Ocean Power Technologies, Inc.

United States of America

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        Patent 69
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        United States 36
        World 28
        Canada 16
Date
2025 February 2
2025 January 1
2025 (YTD) 3
2024 3
2023 1
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IPC Class
F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member 17
F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore 13
F03B 13/10 - Submerged units incorporating electric generators or motors 11
F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy 11
F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore 10
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NICE Class
38 - Telecommunications services 7
42 - Scientific, technological and industrial services, research and design 6
35 - Advertising and business services 4
40 - Treatment of materials; recycling, air and water treatment, 4
07 - Machines and machine tools 3
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Status
Pending 9
Registered / In Force 71

1.

MERROWS

      
Application Number 1841955
Status Registered
Filing Date 2024-09-18
Registration Date 2024-09-18
Owner Ocean Power Technologies, Inc. (USA)
NICE Classes  ?
  • 35 - Advertising and business services
  • 38 - Telecommunications services

Goods & Services

Electronic data collection and data submission services for business purposes in the fields of surface, and areas adjacent to the sea, ocean, or other navigable waterway using computers and sensors. Electronic data transmission using electronic or telecommunications equipment located on and within buoys or autonomous surface vessels on, under, adjacent to, or bordering on a sea, ocean, or other navigable waterway.

2.

SYSTEM AND METHOD FOR VEHICLE CHARGING

      
Application Number 18936528
Status Pending
Filing Date 2024-11-04
First Publication Date 2025-02-20
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Sarokhan, Joseph
  • Mehlman, Joshua
  • Butler, Ethan
  • Goldstein, David

Abstract

A system for charging electric vehicles on or near water includes a charging station and a shore station. The charging station comprises an aquatic structure which can be attached and/or moored to a shore and/or the ground/bed of the body of water, and receptacles that are assembled around the aquatic structure and connected to it. The receptacles are preferably all water-proof, and collectively house various components for allowing the recharging of an electric vehicle. The shore station is remote and mechanically disconnected from the charging station. The shore station is at least partially, if not entirely, above water and attached to the shore of the body of water, for example to a quayside. The shore station includes communication means that complement the communication means of the charging station.

IPC Classes  ?

  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
  • B60L 53/12 - Inductive energy transfer
  • B60L 53/16 - Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
  • B60L 53/35 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
  • B60L 53/53 - Batteries
  • B60L 53/57 - Charging stations without connection to power networks
  • B60L 53/66 - Data transfer between charging stations and vehicles
  • H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

3.

OPT. SCIENCE BUT NOT FICTION.

      
Serial Number 98945014
Status Pending
Filing Date 2025-01-08
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 38 - Telecommunications services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Telecommunications services, namely, electronic data transmission through the use of electronic equipment located on and within buoys distributed in bodies of water for receiving and transmitting electrical signals; providing cellular telephone services and telecommunication gateway services Custom manufacture of equipment for generating power from ocean waves; custom manufacture of autonomous surface vessels; custom manufacture of equipment in the nature of an electric power generator that generates power from ocean waves Product design and development in the field of systems for generating electrical power from wave energy; product design and development of autonomous surface vessels; product design and development of equipment in the nature of an electric power generator that generates power from ocean waves

4.

SYSTEM AND METHOD FOR VEHICLE CHARGING

      
Application Number US2024021635
Publication Number 2024/206410
Status In Force
Filing Date 2024-03-27
Publication Date 2024-10-03
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Sarokhan, Joseph
  • Mehlman, Joshua
  • Butler, Ethan
  • Goldstein, David

Abstract

A system for charging electric vehicles on or near water includes a charging station and a shore station. The charging station comprises an aquatic structure which can be attached and/or moored to a shore and/or the ground/bed of the body of water, and receptacles that are assembled around the aquatic structure and connected to it. The receptacles are preferably all water-proof, and collectively house various components for allowing the recharging of an electric vehicle. The shore station is remote and mechanically disconnected from the charging station. The shore station is at least partially, if not entirely, above water and attached to the shore of the body of water, for example to a quayside. The shore station includes communication means that complement the communication means of the charging station.

IPC Classes  ?

  • B60L 53/12 - Inductive energy transfer
  • B60L 53/14 - Conductive energy transfer
  • B60L 53/53 - Batteries
  • B63B 22/02 - Buoys specially adapted for mooring a vessel
  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
  • H01M 10/44 - Methods for charging or discharging
  • B60L 53/51 - Photovoltaic means
  • B60L 53/52 - Wind-driven generators
  • B63B 22/18 - Buoys having means to control attitude or position, e.g. reaction surfaces or tether

5.

MERROWS

      
Application Number 238243900
Status Pending
Filing Date 2024-09-18
Owner Ocean Power Technologies, Inc. (USA)
NICE Classes  ?
  • 35 - Advertising and business services
  • 38 - Telecommunications services

Goods & Services

(1) Electronic data collection and data submission services for business purposes in the fields of surface, and areas adjacent to the sea, ocean, or other navigable waterway using computers and sensors. (2) Electronic data transmission using electronic or telecommunications equipment located on and within buoys or autonomous surface vessels on, under, adjacent to, or bordering on a sea, ocean, or other navigable waterway.

6.

MERROWS

      
Serial Number 98504273
Status Pending
Filing Date 2024-04-17
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 35 - Advertising and business services
  • 38 - Telecommunications services
  • 42 - Scientific, technological and industrial services, research and design
  • 45 - Legal and security services; personal services for individuals.

Goods & Services

Electronic data collection and data submission services for business purposes in the fields of the surface, sub-surface, and areas adjacent to a sea, ocean, or other navigable waterway using computers and sensors. Electronic data transmission using electronic or telecommunications equipment located on and within buoys or autonomous surface vessels on, under, adjacent to, or bordering on a sea, ocean, or other navigable waterway Electronic data collection, namely, electronic monitoring of the surface, sub-surface, and areas adjacent to a sea, ocean, or other navigable waterway using computers and sensors. Surveillance services relating to the surface, sub-surface, and areas adjacent to a sea, ocean, or other navigable waterway.

7.

OCEAN SECURITY IS NATIONAL SECURITY

      
Serial Number 97782018
Status Pending
Filing Date 2023-02-06
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 38 - Telecommunications services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 35 - Advertising and business services
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Electronic data transmission through the use of electronic equipment located on and within buoys distributed in bodies of water for receiving and transmitting electrical signals or located on and with autonomous surface vessels; transfer of data by telecommunication; telecommunication gateway services using equipment on or within buoys and on or within autonomous surface vessels Custom manufacture of equipment platforms for data collection, surveillance, communications and for generating power from ocean waves Data collection and aggregation, namely, electronic data collection and data submission services for business purposes in the field of maritime domain awareness Product design and development in the field of systems for collecting data in marine environments and for generating electrical power from wave energy; data collection and aggregation, namely, electronic monitoring and reporting of maritime domain awareness data using computers or sensors

8.

OPT

      
Serial Number 97976742
Status Registered
Filing Date 2022-02-10
Registration Date 2023-11-28
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 07 - Machines and machine tools
  • 09 - Scientific and electric apparatus and instruments
  • 38 - Telecommunications services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Electric power generators that generate power from ocean waves Equipment in the nature of a buoy being an apparatus for converting ocean wave energy into mechanical and electrical energy Telecommunications services, namely, electronic data transmission through the use of electronic equipment located on and within buoys distributed in bodies of water for receiving and transmitting electrical signals; providing cellular telephone services and telecommunication gateway services using equipment on or within buoys and on or within autonomous surface vessels Custom manufacture of equipment for generating power from ocean waves Product design and development in the field of systems for generating electrical power from wave energy

9.

Miscellaneous Design

      
Serial Number 97977988
Status Registered
Filing Date 2022-02-10
Registration Date 2024-06-18
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 38 - Telecommunications services
  • 40 - Treatment of materials; recycling, air and water treatment,
  • 12 - Land, air and water vehicles; parts of land vehicles
  • 42 - Scientific, technological and industrial services, research and design

Goods & Services

Telecommunications services, namely, electronic data transmission through the use of electronic equipment located on and within buoys distributed in bodies of water for receiving and transmitting electrical signals; providing cellular telephone services and telecommunication gateway services Custom manufacture of equipment for generating power from ocean waves Autonomous surface vessels Product design and development in the field of systems for generating electrical power from wave energy

10.

Miscellaneous Design

      
Serial Number 97261862
Status Pending
Filing Date 2022-02-10
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ?
  • 07 - Machines and machine tools
  • 09 - Scientific and electric apparatus and instruments

Goods & Services

Electric power generators that generate power from ocean waves Equipment in the nature of a buoy being an apparatus for converting ocean wave energy into mechanical and electrical energy

11.

OPT

      
Serial Number 97261869
Status Registered
Filing Date 2022-02-10
Registration Date 2024-02-27
Owner Ocean Power Technologies, Inc. ()
NICE Classes  ? 12 - Land, air and water vehicles; parts of land vehicles

Goods & Services

Autonomous surface vessels

12.

Wave energy converter including a dual-point absorber connected to an above-water installation via a linkage

      
Application Number 17200173
Grant Number 11459997
Status In Force
Filing Date 2021-03-12
First Publication Date 2021-09-30
Grant Date 2022-10-04
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Parsa, Kourosh
  • Williams, Neil

Abstract

A dual-point absorber includes a first buoy, a second buoy, and a power take-off. The first buoy of the dual-point absorber is connected to a linkage. The second buoy of the dual-point absorber is capable of a movement relative to the first buoy. The power take-off is coupled to the first buoy and the second buoy. The linkage can be used to reduce a heave movement of the first buoy that is caused by waves.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
  • B63B 22/04 - Anchoring arrangements
  • H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices

13.

INSTALLATION-CONNECTED DUAL-POINT ABSORBER

      
Document Number 03112864
Status Pending
Filing Date 2021-03-22
Open to Public Date 2021-09-26
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Parsa, Kourosh
  • Williams, Neil

Abstract

A dual-point absorber includes a first buoy, a second buoy, and a power take-off. The first buoy of the dual-point absorber is connected to a linkage. The second buoy of the dual-point absorber is capable of a movement relative to the first buoy. The power take-off is coupled to the first buoy and the second buoy. The linkage can be used to reduce a heave movement of the first buoy that is caused by waves.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

14.

Subsurface marine battery pack

      
Application Number 16684922
Grant Number 11258105
Status In Force
Filing Date 2019-11-15
First Publication Date 2020-05-21
Grant Date 2022-02-22
Owner Ocean Power Technologies, Inc. (USA)
Inventor Sarokhan, Joseph

Abstract

A subsurface battery system includes a ballast mass at the seafloor, a deep-sea electronics module, having an interface to seafloor payloads, and a subsurface buoyant pressure vessel having a battery. The ballast mass is attached to the deep-sea electronics module. The deep-sea electronics module is connected to the battery. The subsurface buoyant pressure vessel is submerged to a water depth of approximately 50 meters to 500 meters. The system is used for powering the seafloor payloads.

IPC Classes  ?

  • H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • B63B 35/00 - Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
  • H01M 50/20 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders

15.

ELECTRIC POWER GENERATION AND STORAGE BUOY

      
Application Number US2019046499
Publication Number 2020/037039
Status In Force
Filing Date 2019-08-14
Publication Date 2020-02-20
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Sarokhan, Joseph

Abstract

A system includes a fuel burner disposed within a buoy, and at least one fuel tank coupled to the fuel burner. The fuel tank preferably contains ethanol or propane. The system comprises either a thermoelectric generator or an electrical generator mechanically coupled to a heat engine. The ethanol or propane is burned to generate electric power. At least a portion of the electric power that is generated is stored in a battery system so that the system can provide peak levels of electric power consumption that are relatively large. The system can be used in autonomous marine applications.

IPC Classes  ?

  • B63B 22/16 - Buoys specially adapted for marking a navigational route
  • F02G 1/043 - Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
  • H01L 35/30 - SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR - Details thereof operating with Peltier or Seebeck effect only characterised by the heat-exchanging means at the junction
  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices

16.

Electric power generation and storage buoy

      
Application Number 16540286
Grant Number 10933958
Status In Force
Filing Date 2019-08-14
First Publication Date 2020-02-20
Grant Date 2021-03-02
Owner Ocean Power Technologies, Inc. (USA)
Inventor Sarokhan, Joseph

Abstract

A system includes a fuel burner disposed within a buoy, and at least one fuel tank coupled to the fuel burner. The fuel tank preferably contains ethanol or propane. The system comprises either a thermoelectric generator or an electrical generator mechanically coupled to a heat engine. The ethanol or propane is burned to generate electric power. At least a portion of the electric power that is generated is stored in a battery system so that the system can provide peak levels of electric power consumption that are relatively large. The system can be used in autonomous marine applications.

IPC Classes  ?

  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
  • H02S 10/10 - PV power plantsCombinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
  • H02S 10/20 - Systems characterised by their energy storage means
  • H02S 10/40 - Mobile PV generator systems
  • B63B 22/24 - Buoys container type, i.e. having provision for the storage of material
  • H01L 35/30 - SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR - Details thereof operating with Peltier or Seebeck effect only characterised by the heat-exchanging means at the junction
  • H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines

17.

High DC voltage to low DC voltage conversion apparatus including rechargeable batteries

      
Application Number 16348668
Grant Number 10938232
Status In Force
Filing Date 2017-11-10
First Publication Date 2019-09-05
Grant Date 2021-03-02
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Sarokhan, Joseph

Abstract

A buffered power transfer apparatus includes rechargeable batteries. The buffered power transfer apparatus is used on demand to convert high voltage DC to low voltage DC at maximum efficiency with minimum standby losses. The buffered power transfer apparatus may be used in a Wave Energy Converter.

IPC Classes  ?

  • H02J 7/04 - Regulation of the charging current or voltage
  • H02J 7/16 - Regulation of the charging current or voltage by variation of field
  • H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

18.

POWER TAKE OFF SYSTEM FOR WAVE ENERGY CONVERTER BUOY

      
Document Number 03043309
Status Pending
Filing Date 2017-03-22
Open to Public Date 2018-05-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Safabakhsh, Mojtaba
  • Dubey, Chandreshkumar
  • Borgmann, John Joseph, Jr.

Abstract

A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members

19.

PRINTED CIRCUIT BOARD FOR THE ELECTRICAL SYSTEM OF A WAVE ENERGY CONVERTER

      
Application Number US2017061087
Publication Number 2018/089781
Status In Force
Filing Date 2017-11-10
Publication Date 2018-05-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Sarokhan, Joseph
  • Kalanick, Michael

Abstract

The electrical system of a Wave Energy Converter is built into a unitary Printed Circuit Board, thereby vastly simplifying the assembly process, reducing cost, and improving reliability. The unitary Printed Circuit Board integrates power electronics that handles power distribution, with sensors and command circuitry that controls battery charging, battery management, and provides protective features.

IPC Classes  ?

  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy
  • F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
  • H02N 2/08 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners using travelling waves, e.g. linear motors
  • H01L 41/083 - Piezo-electric or electrostrictive elements having a stacked or multilayer structure

20.

HIGH DC VOLTAGE TO LOW DC VOLTAGE CONVERSION APPARATUS INCLUDING RECHARGEABLE BATTERIES

      
Document Number 03043518
Status Pending
Filing Date 2017-11-10
Open to Public Date 2018-05-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Sarokhan, Joseph

Abstract

A buffered power transfer apparatus includes rechargeable batteries. The buffered power transfer apparatus is used on demand to convert high voltage DC to low voltage DC at maximum efficiency with minimum standby losses. The buffered power transfer apparatus may be used in a Wave Energy Converter.

IPC Classes  ?

  • G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
  • H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters

21.

POWER TAKE OFF SYSTEM FOR WAVE ENERGY CONVERTER BUOY

      
Application Number US2017023488
Publication Number 2018/089038
Status In Force
Filing Date 2017-03-22
Publication Date 2018-05-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Safabakhsh, Mojtaba
  • Dubey, Chandreshkumar
  • Borgmann, John Joseph Jr.

Abstract

A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.

IPC Classes  ?

  • F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members
  • F03B 3/16 - Stators
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore

22.

HIGH DC VOLTAGE TO LOW DC VOLTAGE CONVERSION APPARATUS INCLUDING RECHARGEABLE BATTERIES

      
Application Number US2017061082
Publication Number 2018/089778
Status In Force
Filing Date 2017-11-10
Publication Date 2018-05-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Sarokhan, Joseph

Abstract

A buffered power transfer apparatus includes rechargeable batteries. The buffered power transfer apparatus is used on demand to convert high voltage DC to low voltage DC at maximum efficiency with minimum standby losses. The buffered power transfer apparatus may be used in a Wave Energy Converter.

IPC Classes  ?

  • H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
  • G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

23.

Power take off system for wave energy converter buoy

      
Application Number 15465585
Grant Number 10273930
Status In Force
Filing Date 2017-03-21
First Publication Date 2018-05-10
Grant Date 2019-04-30
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Safabakhsh, Mojtaba
  • Dubey, Chandreshkumar
  • Bordmann, John Joseph

Abstract

A power-take-off system for use in a wave energy converter buoy employs a meshing nut and screw shaft assembly for motion conversion. That is, the motion of the buoy float is coupled to drive the nut along the screw shaft on which it is mounted. The linear movement of the nut along the shaft causes the shaft to rotate and this rotational motion is then coupled to rotate an electrical generator.

IPC Classes  ?

  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

24.

POWERBUOY

      
Serial Number 87182867
Status Registered
Filing Date 2016-09-26
Registration Date 2018-11-06
Owner OCEAN POWER TECHNOLOGIES, INC. ()
NICE Classes  ? 07 - Machines and machine tools

Goods & Services

equipment in the nature of a buoy for converting ocean wave energy into mechanical and/or electrical energy

25.

Mooring anchor system for wave energy converters (WECS)

      
Application Number 13685705
Grant Number 09222458
Status In Force
Filing Date 2012-11-27
First Publication Date 2014-05-29
Grant Date 2015-12-29
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Hart, Philip R.

Abstract

A mooring system for a plurality of wave energy converters (WECs) includes a multiplicity of anchors coupled to form an array of contiguous hexagonal shaped cells. Each cell has 3 WECs and 3 anchors located at the vertices of the hexagon, with a WEC alternating with an anchor going around the perimeter of the cell. Except for the cells at the edges of the array, each WEC is connected to two anchors of its cell and an anchor of an adjacent contiguous cell. Each WEC is connected to three different anchors via 3 mooring lines spaced 120 degrees apart about the WEC. The ratio of the number of anchors per WEC is decreased by connecting each anchor to more than one WEC. The cells can be arranged to form many different patterns. In one embodiment a plurality of WECs and anchors are deployed in a generally triangular formation extending from an apex of the triangular formation to a base.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

26.

Reaction mass and spring oscillator for wave energy converter

      
Application Number 13507507
Grant Number 08763389
Status In Force
Filing Date 2012-07-05
First Publication Date 2014-01-09
Grant Date 2014-07-01
Owner Ocean Power Technologies, Inc. (USA)
Inventor Stewart, David B.

Abstract

A reaction mass and a spring are configured to form an “oscillator”. The reaction mass is coupled to, and can wrap around, a first pulley via a first belt/cable. The spring is coupled to, and can wrap around, a second pulley via a second belt/cable. The first and second pulleys are mechanically linked together and are mounted so they rotate in tandem. The diameter of the second pulley is different than the diameter of the first pulley to cause the reaction mass to travel a different distance than the spring in response to the up down motion of the reaction mass. The first and second pulleys may be circular with the second pulley being made smaller than first. Alternatively, the first pulley may be circular and the second pulley a cam of varying radius.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore
  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

27.

Ocean wave energy converter including control system for disabling active rectification when generator output power is less than a conversion loss

      
Application Number 13374350
Grant Number 09945348
Status In Force
Filing Date 2011-12-22
First Publication Date 2013-06-27
Grant Date 2018-04-17
Owner Ocean Power Technologies, Inc. (USA)
Inventor Sarokhan, Joseph

Abstract

An electric generator driven by a source of variable energy produces at its output an alternating current (AC) output voltage and current which is converted via controllable active switching circuitry into a direct current (DC) voltage which is stored in an energy storage element. Power losses are associated with the active switching circuit and the AC to DC conversion. The power available at the output of the generator can be determined. If the available power is less than the power losses the controllable switching circuitry is disabled.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy
  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy

28.

ANCHORING APPARATUS FOR WAVE ENERGY CONVERTERS

      
Application Number US2012056784
Publication Number 2013/048915
Status In Force
Filing Date 2012-09-23
Publication Date 2013-04-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Powers, William, B.
  • Chi, Wei-Ming

Abstract

An anchoring enclosure embodying the invention includes a chamber whose buoyancy can be controlled by pumping a gas (e.g., air) or a liquid {e.g., sea water) into the chamber- The anchoring enclosure includes a bottom extension for embedding the anchoring enclosure into the sea bed. The anchoring enclosure may include a piping system for blowing a fluid below the bottom enclosure and raising the enclosure and/or an anti-scouring skirt extending about the perimeter of the lower portion of the structure and outward from the anchoring enclosure for resting along the bottom of the body of water and preventing water movement from disturbing the embedded bottom extension.

IPC Classes  ?

  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy

29.

PITCH DRIVEN WAVE ENERGY CONVERTER DEVICES AND SYSTEMS

      
Document Number 02831292
Status In Force
Filing Date 2012-03-26
Open to Public Date 2012-10-04
Grant Date 2019-05-14
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David B.

Abstract

A wave energy converter (WEC) buoy includes at least one pitch-driven WEC ("PDWEC") device. Each PDWEC device includes two reaction masses which are placed at diametrically opposite ends of a container designed to float along the surface of a body of water and to move In response to the pitching motion of the waves. The reaction masses are interconnected so that when one reaction mass moves up, the diametrically opposed reaction mass moves down, and vice-versa. The movement of the reaction masses drives power take off (PTO) devices to produce useful energy. The reaction masses may be interconnected by any suitable linking system. One or more PDWEC device may be combined with a heave responsive device to produce a WEC buoy which can produce a power output in response to pitch or heave motion.

IPC Classes  ?

30.

MULTI-MODE WAVE ENERGY CONVERTER DEVICES AND SYSTEMS

      
Document Number 02831296
Status In Force
Filing Date 2012-03-26
Open to Public Date 2012-10-04
Grant Date 2019-10-01
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David B.
  • Eder, James E.

Abstract

A wave energy converter (WEC) system includes WEC devices which can function to produce useful energy (power) efficiently in response to heave motion and/or pitch motion and/or roll motion. Pitch responsive devices are deployed around the outer periphery of a container and one (or more) heave responsive device is located about the center of the container. The pitch responsive devices may be of the type defined as PDWECs which include two reaction masses which are primarily operable in response to pitching motion or they may be of the type which includes one reaction mass operable in response to pitch and/or heave motion,

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03G 7/08 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching, or like movements, e.g. from the vibrations of a machine

31.

Pitch and heave driven wave energy converter system including cable supported reaction masses

      
Application Number 13428877
Grant Number 09790913
Status In Force
Filing Date 2012-03-23
First Publication Date 2012-10-04
Grant Date 2017-10-17
Owner Ocean Power Technologies, Inc. (USA)
Inventor Stewart, David B.

Abstract

A wave energy converter (WEC) buoy includes at least one pitch-driven WEC (“PDWEC”) device. Each PDWEC device includes two reaction masses which are placed at diametrically opposite ends of a container designed to float along the surface of a body of water and to move in response to the pitching motion of the waves. The reaction masses are interconnected so that when one reaction mass moves up, the diametrically opposed reaction mass moves down, and vice-versa. The movement of the reaction masses drives power take off (PTO) devices to produce useful energy. The reaction masses may be interconnected by any suitable linking system. One or more PDWEC device may be combined with a heave responsive device to produce a WEC buoy which can produce a power output in response to pitch or heave motion.

IPC Classes  ?

  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
  • F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups

32.

Ball and socket power cable connector

      
Application Number 13431775
Grant Number 08869524
Status In Force
Filing Date 2012-03-27
First Publication Date 2012-10-04
Grant Date 2014-10-28
Owner Ocean Power Technologies, Inc (USA)
Inventor
  • Stewart, David B.
  • Powers, William B.

Abstract

Apparatus for connecting a power cable to a marine vessel which is subject to pitch, heave, roll and yaw motion includes a ball and socket device for decreasing the twisting and bending of the power cable. The socket is attached to the vessel and the ball can rotate freely Within the socket but its up down motion is restricted. The power cable's outer protective sheath is attached to the ball while its conductors pass through the ball and are connected to an internal connector. A flexible cable (wire) is connected between the internal connector and electrical equipment internal to the marine vessel.

IPC Classes  ?

  • F03C 1/00 - Reciprocating-piston liquid engines
  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • B63B 21/00 - Tying-upShifting, towing, or pushing equipmentAnchoring
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

33.

Autonomously operated buoys with power generation and power usage control

      
Application Number 13065679
Grant Number 08723355
Status In Force
Filing Date 2011-03-28
First Publication Date 2012-10-04
Grant Date 2014-05-13
Owner Ocean Power Technologies (USA)
Inventor
  • Eder, James E.
  • Sarokhan, Joseph A.

Abstract

Apparatus, intended to be deployed in a body of water, includes a payload comprised of a multiplicity of different electronic and electromechanical loads and a wave energy converter (WEC) system responsive to the amplitude of waves in the body of water for producing electrical power, which is a function of the wave amplitudes, to power the payload. The apparatus includes switching circuitry for controlling the application of power to selected ones of the loads. Control circuitry and devices which are responsive to the electric power being produced control the switching circuitry for controlling the amount of power supplied to, and consumed by, the loads.

IPC Classes  ?

  • B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles
  • B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
  • H02G 3/00 - Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
  • F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
  • H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator

34.

WAVE ENERGY CONVERTER WITH ASYMMETRICAL FLOAT

      
Application Number US2011001350
Publication Number 2012/134422
Status In Force
Filing Date 2011-08-01
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Taylor, George, W.
  • Gerber, James, S.

Abstract

A wave energy converter (WEC) having an asymmetrically shaped float and a spar which move relative to each other in response to the waves. The asymmetrical float has one side longer than the other. A power take off device (PTO) is coupled between the asymmetric float and the spar for converting their relative motion into useful power. Apparatus is coupled to the WEC for: (a) orienting and rotating the longer side of the float to face and receive oncoming waves to increase energy capture when the waves have an amplitude below a predetermined value for improving the power generation of the WEC; and (b) rotating the float to orient the narrower side of the float to face and receive the incoming waves when the waves have an amplitude above a predetermined value, so as to reduce the forces to which the WEC is subjected.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

35.

PITCH DRIVEN WAVE ENERGY CONVERTER DEVICES AND SYSTEMS

      
Application Number US2012030583
Publication Number 2012/135127
Status In Force
Filing Date 2012-03-26
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David, B.

Abstract

A wave energy converter (WEC) buoy includes at least one pitch-driven WEC ("PDWEC") device. Each PDWEC device includes two reaction masses which are placed at diametrically opposite ends of a container designed to float along the surface of a body of water and to move In response to the pitching motion of the waves. The reaction masses are interconnected so that when one reaction mass moves up, the diametrically opposed reaction mass moves down, and vice-versa. The movement of the reaction masses drives power take off (PTO) devices to produce useful energy. The reaction masses may be interconnected by any suitable linking system. One or more PDWEC device may be combined with a heave responsive device to produce a WEC buoy which can produce a power output in response to pitch or heave motion.

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors

36.

MULTI-MODE WAVE ENERGY CONVERTER DEVICES AND SYSTEMS

      
Application Number US2012030603
Publication Number 2012/135138
Status In Force
Filing Date 2012-03-26
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David, B.
  • Eder, James, E.

Abstract

A wave energy converter (WEC) system includes WEC devices which can function to produce useful energy (power) efficiently in response to heave motion and/or pitch motion and/or roll motion. Pitch responsive devices are deployed around the outer periphery of a container and one (or more) heave responsive device is located about the center of the container. The pitch responsive devices may be of the type defined as PDWECs which include two reaction masses which are primarily operable in response to pitching motion or they may be of the type which includes one reaction mass operable in response to pitch and/or heave motion,

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors

37.

AUTONOMOUSLY OPERATED BUOYS WITH POWER GENERATION AND POWER USAGE CONTROL

      
Document Number 02831260
Status In Force
Filing Date 2011-08-01
Open to Public Date 2012-10-04
Grant Date 2018-07-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Eder, James E.
  • Sarokhan, Joseph A.

Abstract

Apparatus, intended to be deployed in a body of water, includes a payload comprised of a multiplicity of different electronic and electromechanical loads and a wave energy converter (WEC) system responsive to the amplitude of waves in the body of water for producing electrical power, which is a function of the wave amplitudes, to power the payload. The apparatus includes switching circuitry for controlling the application of power to selected ones of the loads. Control circuitry and devices which are responsive to the electric power being produced control the switching circuitry for controlling the amount of power supplied to, and consumed by, the loads.

IPC Classes  ?

  • B63B 22/00 - Buoys
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
  • H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines

38.

WAVE ENERGY CONVERTER WITH ROTARY HYDRAULIC SPRING

      
Document Number 02831417
Status In Force
Filing Date 2012-03-26
Open to Public Date 2012-10-04
Grant Date 2019-12-03
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David B.

Abstract

The generally up and down movement of a reaction mass is converted into rotary motion which is used to drive a rotary hydraulic spring comprised of a rotary hydraulic pump motor and an accumulator to produce a "spring" function. The invention is particularly applicable to wave energy converters (WECs) having a reaction mass which needs to be coupled to a spring to ensure Its oscillation and to cause it to be centered about its center of travel. The linear up-down motion of a reaction mass may be converted via a linear-to-rotary translator to rotary motion to drive a rotary hydraulic pump/motor so as to provide spring action to the reaction mass and ensure its oscillation and proper positioning.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03G 7/08 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching, or like movements, e.g. from the vibrations of a machine

39.

BALL AND SOCKET POWER CABLE CONNECTOR

      
Document Number 02831445
Status In Force
Filing Date 2012-03-27
Open to Public Date 2012-10-04
Grant Date 2019-09-24
Owner OCEAN POWER TECHNOLOGIES, INC (USA)
Inventor
  • Stewart, David B.
  • Powers, William B.

Abstract

Apparatus for connecting a power cable to a marine vessel which is subject to pitch, heave, roll and yaw motion includes a ball and socket device for decreasing the twisting and bending of the power cable. The socket is attached to the vessel and the ball can rotate freely within the socket but its up down motion is restricted. The power cable's outer protective sheath is attached to the ball while its conductors pass through the ball and are connected to an internal connector. A flexible cable (wire) is connected between the internal connector and electrical equipment internal to the marine vessel.

IPC Classes  ?

  • B63B 17/00 - Vessels parts, details, or accessories, not otherwise provided for
  • B63B 22/00 - Buoys
  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy
  • F16L 5/00 - Devices for use where pipes, cables or protective tubing pass through walls or partitions
  • H01R 13/00 - Details of coupling devices of the kinds covered by groups or
  • H01R 13/02 - Contact members

40.

Wave energy converter with asymmetrical float

      
Application Number 13065673
Grant Number 08904778
Status In Force
Filing Date 2011-03-28
First Publication Date 2012-10-04
Grant Date 2014-12-09
Owner Ocean Power Technologies, Inc (USA)
Inventor
  • Gerber, James S.
  • Taylor, George W.

Abstract

A wave energy converter (WEC) having an asymmetrically shaped float and a spar which move relative to each other in response to the waves. The asymmetrical float has one side longer than the other. A power take off device (PTO) is coupled between the asymmetric float and the spar for converting their relative motion into useful power. Apparatus is coupled to the WEC for: (a) orienting and rotating the longer side of the float to face and receive oncoming waves to increase energy capture when the waves have an amplitude below a predetermined value for improving the power generation of the WEC; and (b) rotating the float to orient the narrower side of the float to face and receive the incoming waves when the waves have an amplitude above a predetermined value, so as to reduce the forces to which the WEC is subjected. There is no known WEC system with an asymmetrical float which is raised and lowered by the waves.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

41.

Multi-mode wave energy converter devices and systems

      
Application Number 13430052
Grant Number 08723351
Status In Force
Filing Date 2012-03-26
First Publication Date 2012-10-04
Grant Date 2014-05-13
Owner Ocean Power Technologies, Inc (USA)
Inventor
  • Stewart, David B.
  • Eder, James E.

Abstract

A wave energy converter (WEC) system includes WEC devices which can function to produce useful energy (power) efficiently in response to heave motion and/or pitch motion and/or roll motion. Pitch responsive devices are deployed around the outer periphery of a container and one (or more) heave responsive device is located about the center of the container. The pitch responsive devices may be of the type defined as PDWECs which include two reaction masses which are primarily operable in response to pitching motion or they may be of the type which includes one reaction mass operable in response to pitch and/or heave motion.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

42.

Wave energy converter with rotary hydraulic spring

      
Application Number 13430599
Grant Number 09115686
Status In Force
Filing Date 2012-03-26
First Publication Date 2012-10-04
Grant Date 2015-08-25
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David B.

Abstract

The generally up and down movement of a reaction mass is converted into rotary motion which is used to drive a rotary hydraulic spring comprised of a rotary hydraulic pump motor and an accumulator to produce a “spring” function. The invention is particularly applicable to wave energy converters (WECs) having a reaction mass which needs to be coupled to a spring to ensure its oscillation and to cause it to be centered about its center of travel. The linear up-down motion of a reaction mass may be converted via a linear-to-rotary translator to rotary motion to drive a rotary hydraulic pump/motor so as to provide spring action to the reaction mass and ensure its oscillation and proper positioning.

IPC Classes  ?

  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups

43.

AUTONOMOUSLY OPERATED BUOYS WITH POWER GENERATION AND POWER USAGE CONTROL

      
Application Number US2011001351
Publication Number 2012/134423
Status In Force
Filing Date 2011-08-01
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Eder, James, E.
  • Sarokhan, Joseph, A.

Abstract

Apparatus, intended to be deployed in a body of water, includes a payload comprised of a multiplicity of different electronic and electromechanical loads and a wave energy converter (WEC) system responsive to the amplitude of waves in the body of water for producing electrical power, which is a function of the wave amplitudes, to power the payload. The apparatus includes switching circuitry for controlling the application of power to selected ones of the loads. Control circuitry and devices which are responsive to the electric power being produced control the switching circuitry for controlling the amount of power supplied to, and consumed by, the loads.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

44.

WAVE ENERGY CONVERTER WITH ROTARY HYDRAULIC SPRING

      
Application Number US2012030630
Publication Number 2012/135154
Status In Force
Filing Date 2012-03-26
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David, B.

Abstract

The generally up and down movement of a reaction mass is converted into rotary motion which is used to drive a rotary hydraulic spring comprised of a rotary hydraulic pump motor and an accumulator to produce a "spring" function. The invention is particularly applicable to wave energy converters (WECs) having a reaction mass which needs to be coupled to a spring to ensure Its oscillation and to cause it to be centered about its center of travel. The linear up-down motion of a reaction mass may be converted via a linear-to-rotary translator to rotary motion to drive a rotary hydraulic pump/motor so as to provide spring action to the reaction mass and ensure its oscillation and proper positioning.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

45.

BALL AND SOCKET POWER CABLE CONNECTOR

      
Application Number US2012030754
Publication Number 2012/135228
Status In Force
Filing Date 2012-03-27
Publication Date 2012-10-04
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David B.
  • Powers, William B.

Abstract

Apparatus for connecting a power cable to a marine vessel which is subject to pitch, heave, roll and yaw motion includes a ball and socket device for decreasing the twisting and bending of the power cable. The socket is attached to the vessel and the ball can rotate freely within the socket but its up down motion is restricted. The power cable's outer protective sheath is attached to the ball while its conductors pass through the ball and are connected to an internal connector. A flexible cable (wire) is connected between the internal connector and electrical equipment internal to the marine vessel.

IPC Classes  ?

  • H01R 13/00 - Details of coupling devices of the kinds covered by groups or

46.

WAVE ENERGY CONVERTER AND POWER TAKE OFF SYSTEM

      
Document Number 02745387
Status In Force
Filing Date 2009-11-23
Open to Public Date 2011-05-26
Grant Date 2017-01-03
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Eder, James E.
  • Stewart, David B.

Abstract

A wave energy converter (WEC) includes a float tending to move in phase with the waves, a spar tending to move out of phase with the float and power take off device (PTO) coupled between the float and spar for converting their relative motion into useful energy. The PTO in-cludes a rack and pinion mechanism which drives a high-torque, multi-pole, permanent magnet generator (PMG) to produce electrical signals of relatively high frequency relative to the frequency of the waves and the basic motion of the rack and pinion mechanism. In accordance with one aspect of the invention, the rack and pinion mechanism may be located within the spar which may be hermetically sealed by a sealing mechanis'm which allows a thrust rod coupled between the float and spar to move up and down with little friction to ensure efficient operation. In addition, a braking arrangement is provided for inhibiting relative motion between the float and spar during extreme severe wave conditions. In this way, the pinion gears and generators need only be sized for the operational wave conditions.

IPC Classes  ?

  • E02B 9/08 - Tide or wave power plants
  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore

47.

WAVE ENERGY CONVERTER AND POWER TAKE OFF SYSTEM

      
Application Number US2009006272
Publication Number 2011/062576
Status In Force
Filing Date 2009-11-23
Publication Date 2011-05-26
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Eder, James, E.
  • Stewart, David, B.

Abstract

A wave energy converter (WEC) includes a float tending to move in phase with the waves, a spar tending to move out of phase with the float and power take off device (PTO) coupled between the float and spar for converting their relative motion into useful energy. The PTO includes a rack and pinion mechanism which drives a high-torque, multi-pole, permanent magnet generator (PMG) to produce electrical signals of relatively high frequency relative to the frequency of the waves and the basic motion of the rack and pinion mechanism. In accordance with one aspect of the invention, the rack and pinion mechanism may be located within the spar which may be hermetically sealed by a sealing mechanis'm which allows a thrust rod coupled between the float and spar to move up and down with little friction to ensure efficient operation. In addition, a braking arrangement is provided for inhibiting relative motion between the float and spar during extreme severe wave conditions. In this way, the pinion gears and generators need only be sized for the operational wave conditions.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

48.

Wave energy converter and power take off system

      
Application Number 12587651
Grant Number 08487459
Status In Force
Filing Date 2009-10-09
First Publication Date 2011-04-14
Grant Date 2013-07-16
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Eder, James E.
  • Stewart, David B.

Abstract

A wave energy converter (WEC) includes a float tending to move in phase with the waves, a spar tending to move out of phase with the float and power take off device (PTO) coupled between the float and spar for converting their relative motion into useful energy. The PTO includes a rack and pinion mechanism which drives a high-torque, multi-pole, permanent magnet generator (PMG) to produce electrical signals of relatively high frequency relative to the frequency of the waves and the basic motion of the rack and pinion mechanism. In accordance with one aspect of the invention, the rack and pinion mechanism may be located within the spar which may be hermetically sealed by a sealing mechanism which allows a thrust rod coupled between the float and spar to move up and down with little friction to ensure efficient operation. In addition, a braking arrangement is provided for inhibiting relative motion between the float and spar during extreme severe wave conditions. In this way, the pinion gears and generators need only be sized for the operational wave conditions.

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator

49.

WEC with improved power take off apparatus

      
Application Number 12798055
Grant Number 08476782
Status In Force
Filing Date 2010-03-29
First Publication Date 2010-10-21
Grant Date 2013-07-02
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Chi, Wei-Ming
  • Hart, Philip R.

Abstract

A wave energy converter (WEC) includes a float and a spar for guiding the up and down movement of the float in response to the waves. A power take off (PTO) device coupled between the float and the spar and mounted within one of the float and spar such that the PTO includes apparatus responsive to the mechanical interaction of the float with the portion of the spar in proximity to the float for converting their relative motion into useful energy. In one embodiment the PTO includes a linear rack extending along an external portion of the spar and a linear to rotary converter, mounted within the float, including a double sided toothed belt for engaging the rack and causing rotation of the rotary converter to drive an electric generator. In another embodiment the PTO includes tires mounted within the float which rotate as the float moves up and down. In another embodiment the PTO includes a rack and pinion arrangement with one of them connected to the spar and the other mounted in the float.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

50.

Power take off apparatus for a WEC

      
Application Number 12798054
Grant Number 08456030
Status In Force
Filing Date 2010-03-29
First Publication Date 2010-10-14
Grant Date 2013-06-04
Owner Ocean Power Technologies, Inc. (USA)
Inventor Chi, Wei-Ming

Abstract

A wave energy converter (WEC) includes a float which moves generally in phase with the waves and whose up and down motion is guided by and along a spar having an upper portion and a lower portion. A power take off (PTO) device is coupled between the float and the spar for converting their relative motion into useful energy. In some embodiments, the PTO includes (a) a drum having an axis of rotation rotatably mounted within one of the float and spar; and (b) cabling means connected between the drum and the other one of the float and spar for causing the drum to rotate as a function of the up and down motion of the float. In other embodiments, the PTO system is formed using a pre-tensioned roller chain wound around sprocket wheels located within one of the spar and float with the opposite ends of the chain connected to the other one of the spar and float to cause rotation of the sprocket wheels in response to movement of the float relative to the spar.

IPC Classes  ?

  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore

51.

WEC WITH IMPROVED POWER TAKE OFF APPARATUS

      
Application Number US2010000933
Publication Number 2010/117414
Status In Force
Filing Date 2010-03-29
Publication Date 2010-10-14
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Chi, Wei-Ming
  • Hart, Philip, R.

Abstract

A wave energy converter (WECe) includes a float and a spar for guiding the up and down movement of the float in response to waves. A power take off (PTA) device coupled between the float and the spar and mounted within one of the float and spar such that the PTA includes apparatus responsive to the mechanical Interaction of the float with the portion of the spar in proximity to the float for converting their relative motion into useful energy. In one embodiment the PTA includes a linear rack extending along an external portion of the spar and a linear to rotary converter, mounted within the float, including a double sided toothed belt for engaging the rack and causing rotation of the rotary converter to drive an electric generator. In another embodiment the PTA includes tires mounted within the float which rotate as the float moves up and down.

IPC Classes  ?

  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore

52.

IMPROVED POWER TAKE OFF APPARATUS FOR A WEC

      
Application Number US2010000934
Publication Number 2010/117415
Status In Force
Filing Date 2010-03-29
Publication Date 2010-10-14
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Chi, Wei-Ming

Abstract

A wave energy converter (WEC) includes a float which moves generally in phase with the waves and whose up and down motion is guided by and along a spar having an upper portion and a lower portion. A power take off (PTO) device is coupled between the float and the spar for converting their relative motion into useful energy. In some embodiments, the PTO includes (a) a drum having an axis of rotation rotatably mounted within one of the float and spar; and (b) cabling means connected between the drum and the other one of the float and spar for causing the drum to rotate as a function of the up and down motion of the float. In other embodiments, the PTO system is formed using a pre-tensioned roller chain wound around sprocket wheels located within one of the spar and float with the opposite ends of the chain connected to the other one of the spar and float to cause rotation of the sprocket wheels in response to movement of the float relative to the spar.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

53.

Advanced wave energy converter control

      
Application Number 12455094
Grant Number 08587139
Status In Force
Filing Date 2009-05-28
First Publication Date 2010-06-17
Grant Date 2013-11-19
Owner Ocean Power Technologies, Inc. (USA)
Inventor Gerber, James S.

Abstract

A wave energy converter (WEC) system includes first and second bodies which can move relative to each other in response to waves and a power-take-off (PTO) device coupled between the two bodies to convert their relative motion into energy. A sensor is used to sense selected characteristics of an incoming wave and produce signals which are applied to a control computer for predicting the impact of the incoming waves on the WEC. Simultaneously, signals indicative of the actual conditions (e.g. the velocity) of the WEC are also supplied to the control computer which is programmed to process the predicted and actual information in order to generate appropriate signals (forces) to the components of the WEC such that the average wave power captured by the PTO is maximized.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore

54.

Float for wave energy converter (WEC)

      
Application Number 12592108
Grant Number 08464527
Status In Force
Filing Date 2009-11-19
First Publication Date 2010-05-27
Grant Date 2013-06-18
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Gerber, James S.
  • Phelan, Christopher Thomas
  • Qiu, Wei
  • Spencer, Donald Smith

Abstract

A float structure for a WEC is designed to have a tapered underside to reduce the impact due to wave slam and bending moments while providing little reduction in the surface area responding to the wave surface in order to maintain the beneficial power generating capability of a “flat” float. The underside of the float presents an inverted wedge section to decrease loads associated with wave slamming. The float may have a generally toroidal or elliptical configuration at and about the “still” water line with the generally submerged underside of the float having a cross section shaped to have one or more inverted triangular sections extending between the outer perimeter of the float and its center to reduce impact loading due to wave slamming while maintaining power producing capability.

IPC Classes  ?

  • F03B 17/02 - Other machines or engines using hydrostatic thrust
  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

55.

FLOAT FOR WAVE ENERGY CONVERTER (WEC)

      
Application Number US2009006184
Publication Number 2010/059209
Status In Force
Filing Date 2009-11-19
Publication Date 2010-05-27
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Gerber, James, S.
  • Phelan, Christopher, T.
  • Qiu, Wei
  • Spencer, Donald, Smith

Abstract

A float structure for a WEC is designed to have a tapered underside to reduce the impact due to wave slam and bending moments while providing little reduction in the surface area responding to the wave surface in order to maintain the beneficial power generating capability of a "flat" float. The underside of the float presents an inverted wedge section to decrease loads associated with wave slamming. The float may have a generally toroidal or elliptical configuration at and about the "still" water line with the generally submerged underside of the float having a cross section shaped to have one or more inverted triangular sections extending between the outer perimeter of the float and its center to reduce impact loading due to wave slamming while maintaining power producing capability.

IPC Classes  ?

  • F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy

56.

WAVE ENERGY CONVERTER WITH INTERNAL MASS ON SPRING OSCILLATOR

      
Application Number US2008012092
Publication Number 2010/047677
Status In Force
Filing Date 2008-10-24
Publication Date 2010-04-29
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Stewart, David, B.

Abstract

A wave energy converter (WEC) system includes a shell containing an internal oscillator comprised of a reaction mass suspended from the shell by an elastic spring in parallel with a constant force spring. The constant force spring provides a relatively constant force (Fc) to counterbalance the static weight of the reaction mass and reduce the extension 'static' length of the elastic spring while the elastic spring exerts a force (Fes) on the reaction mass that is proportional to the displacement, x, of the elastic spring. A power take-off (PTO) device, located within the shell, coupled between the shell and the internal oscillator converts their relative motion into electrical energy.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

57.

ADVANCED WAVE ENERGY CONVERTER CONTROL

      
Application Number US2009003242
Publication Number 2009/148531
Status In Force
Filing Date 2009-05-28
Publication Date 2009-12-10
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Gerber, James, S.

Abstract

A wave energy converter (WEC) system includes first and second bodies which can move relative to each other in response to waves and a power-take-off (PTO) device coupled between the two bodies to convert their relative motion into energy. A sensor is used to sense selected characteristics of an incoming wave and produce signals which are applied to a control computer for predicting the impact of the incoming waves on the WEC. Simultaneously, signals indicative of the actual conditions (e.g. the velocity) of the WEC are also supplied to the control computer which is programmed to process the predicted and actual information in order to generate appropriate signals (forces) to the components of the WEC such that the average wave power captured by the PTO is maximized.

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors

58.

MOORING OF MULTIPLE ARRAYS OF BUOY-LIKE WECS

      
Application Number US2008006477
Publication Number 2009/094000
Status In Force
Filing Date 2008-05-21
Publication Date 2009-07-30
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Draper, Mark, R.
  • Silcock, David, Henry

Abstract

For reducing the number of anchors required for mooring a plurality of WECs in a body of water, the WECs are arrayed in two patterns enabling the sharing of anchors among the WECs. One pattern comprises pluralities of WECs disposed in polygonal shaped cells with an anchor disposed beneath each cell connected to all the WECs in the cell. A second pattern comprises a tessellated pattern of contiguous cells with WECs at the interface between contiguous pairs of cells being common to both cells of the pairs.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

59.

WAVE ENERGY CONVERTER WITH AIR COMPRESSION (WECWAC)

      
Application Number US2007011724
Publication Number 2008/076145
Status In Force
Filing Date 2007-05-16
Publication Date 2008-06-26
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Buffard, Keith
  • Draper, Mark
  • Pullen, Keith
  • Rhodes, Robin

Abstract

A wave energy converter with air compression (WECWAC) includes a cylinder and a piston located within the cylinder dividing the cylinder into an upper chamber and a lower chamber. The cylinder is fixedly attached to a spar whose up/down (heave) motion is restrained. The piston is fixedly attached to, and driven by, a float which moves generally in phase with the waves. Under typical wave conditions the piston functions to compress air within the upper chamber on its up stroke and within the lower chamber on its down stroke, i. e., the system is thus double-acting. In still water, the spar and cylinder combination is designed to drift down into the body of water relative to the piston whereby the size/volume of the upper chamber is decreased (while that of the lower chamber is increased). For small amplitude waves the piston continues to compress air in the upper chamber and this asymmetrical compression continues until the waves reach a predetermine level when 'double-action' is resumed. Controlling the position of the cylinder relative to the piston enables the WECWAC to automatically regulate its compression 'stroke' to suit varying wave conditions. The pressurized air from a WECWAC may be stored and/or processed to drive a turbo-generator or it may be combined with the outputs of other WECWACs to drive a single large and highly efficient turbo-generator.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

60.

Damping plates

      
Application Number 11799138
Grant Number 07594780
Status In Force
Filing Date 2007-05-01
First Publication Date 2008-06-05
Grant Date 2009-09-29
Owner Ocean Power Technologies, Inc. (USA)
Inventor Bull, Diana

Abstract

A damping (or heave) plate comprises a generally flat plate attached, beneath the surface of a sea, and in horizontal orientation, to a structural member subject to being vertically moved in response to passing surface waves. The plate tends to resist vertical movements and has the effect of adding mass to the structure. A vertically extending structure is added to both major surfaces of the heave plate for increasing the volume of water moved by the plate. For minimizing drag forces generally created by use of the damping plate, the vertically extending structure is shaped to include curved hydrodynamic surfaces for minimizing turbulence in the surrounding water.

IPC Classes  ?

61.

Heave plate with improved characteristics

      
Application Number 11796851
Grant Number 07878734
Status In Force
Filing Date 2007-04-30
First Publication Date 2007-12-13
Grant Date 2011-02-01
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Bull, Diana
  • Gerber, James
  • Powers, William

Abstract

Apparatus embodying the invention include a damping plate attached to the submerged end of a spar-like element floating in a body of water. The spar like element tends to move up and down in a vertical direction in response to passing waves. The damping plate has a pair of oppositely facing surfaces extending transversely to the vertical direction of the movement of the spar-like element and vertical structures (“lips”) mounted on the oppositely facing surfaces for increasing the effective mass of water pushed during movement of the damping plate through the water. Damping plates with lips, as per the invention, may be used in wave energy converters to control the relative motion between the spar-like element and a float to increase the energy produced.

IPC Classes  ?

  • E02B 9/08 - Tide or wave power plants
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

62.

Wave energy converter (WEC) with heave plates

      
Application Number 11796852
Grant Number 07877994
Status In Force
Filing Date 2007-04-30
First Publication Date 2007-11-22
Grant Date 2011-02-01
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Bull, Diana
  • Gerber, James
  • Powers, William

Abstract

The stability and power conversion efficiency of a wave energy converter (WEC) which includes a float, a spar and a power taken device (PTO) connected between the spar and the float is increased by connecting a heave plate to the spar in a very secure manner and by carefully limiting the movement between the float and spar to one direction (i.e., up-down motion). Buoyancy chambers may be attached to the WEC to facilitate its transportation and deployment. The WEC may be formed in sections and assembled at, or close to, the point of deployment.

IPC Classes  ?

  • F03C 1/00 - Reciprocating-piston liquid engines

63.

IMPROVED WAVE ENERGY CONVERTER (WEC) WITH HEAVE PLATES

      
Document Number 02651998
Status In Force
Filing Date 2007-04-30
Open to Public Date 2007-11-15
Grant Date 2014-07-08
Owner OCEAN POWER TECHNOLOGIES, INC (USA)
Inventor
  • Powers, William B.
  • Gerber, James
  • Bull, Diana

Abstract

The stability and power conversion efficiency of a wave energy converter (WEC) which includes a float, a spar and a power taken device (PTO) connected between the spar and the float is increased by connecting a heave plate to the spar in a very secure manner and by carefully limiting the movement between the float and spar to one direction (i.e., up-down motion). Buoyancy chambers may be attached to the WEC to facilitate its transportation and deployment. The WEC may be formed in sections and assembled at, or close to, the point of deployment.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

64.

HEAVE PLATE WITH VERTICAL STRUCTURES

      
Application Number US2007010412
Publication Number 2007/130334
Status In Force
Filing Date 2007-04-30
Publication Date 2007-11-15
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Powers, William, B.
  • Gerber, James
  • Bull, Diana

Abstract

Apparatus embodying the invention include a damping plate attached to1 the submerged end of a spar-like element floating in a body of water. The spar like element tends to move up and down in a vertical direction in response to passing waves. The damping plate has a pair of oppositely facing surfaces extending transversely to the vertical direction of the movement of the spar-like element and vertical structures ('lips') mounted on the oppositely facing surfaces for increasing the effective mass of water pushed during movement of the damping plate through the water. Damping plates with lips, as per the invention, may be used in wave energy converters to control the relative motion between the spar- like element and a float to increase the energy produced. Damping plates with lips, as per the invention, may be used to effectively dampen the motion of an offshore platform to which the spar-like element is fixedly attached.

IPC Classes  ?

  • B63B 39/00 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude
  • F04B 35/02 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being fluid

65.

DAMPING (HEAVE) PLATES HAVING IMPROVED CHARACTERISTICS

      
Application Number US2007010513
Publication Number 2007/130385
Status In Force
Filing Date 2007-05-01
Publication Date 2007-11-15
Owner OCEAN POWER TECHNOLOGEIS, INC. (USA)
Inventor Bull, Diana

Abstract

A damping (or heave) plate comprises a generally flat plate attached, beneath the surface of a sea, and in horizontal orientation, to a structural member subject to being vertically moved in response to passing surface waves. The plate tends to resist vertical movements and has the effect of adding mass to the structure. A vertically extending structure is added to both major surfaces of the heave plate for increasing the volume of water moved by the plate. For minimizing drag forces generally created by use of the damping plate, the vertically extending structure is shaped to include curved hydrodynamic surfaces for minimizing turbulence in the surrounding water.

IPC Classes  ?

  • B63B 39/00 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude
  • F04B 35/02 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being fluid

66.

HEAVE PLATE WITH IMPROVED CHARACTERISTICS

      
Document Number 02651999
Status In Force
Filing Date 2007-04-30
Open to Public Date 2007-11-15
Grant Date 2014-07-08
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Powers, William B.
  • Gerber, James
  • Bull, Diana

Abstract

Apparatus embodying the invention include a damping plate attached to1 the submerged end of a spar-like element floating in a body of water. The spar like element tends to move up and down in a vertical direction in response to passing waves. The damping plate has a pair of oppositely facing surfaces extending transversely to the vertical direction of the movement of the spar-like element and vertical structures ("lips") mounted on the oppositely facing surfaces for increasing the effective mass of water pushed during movement of the damping plate through the water. Damping plates with lips, as per the invention, may be used in wave energy converters to control the relative motion between the spar- like element and a float to increase the energy produced. Damping plates with lips, as per the invention, may be used to effectively dampen the motion of an offshore platform to which the spar-like element is fixedly attached.

IPC Classes  ?

  • B63B 39/00 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude
  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

67.

DAMPING (HEAVE) PLATES HAVING IMPROVED CHARACTERISTICS

      
Document Number 02652000
Status In Force
Filing Date 2007-05-01
Open to Public Date 2007-11-15
Grant Date 2014-07-08
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Bull, Diana

Abstract

A damping (or heave) plate comprises a generally flat plate attached, beneath the surface of a sea, and in horizontal orientation, to a structural member subject to being vertically moved in response to passing surface waves. The plate tends to resist vertical movements and has the effect of adding mass to the structure. A vertically extending structure is added to both major surfaces of the heave plate for increasing the volume of water moved by the plate. For minimizing drag forces generally created by use of the damping plate, the vertically extending structure is shaped to include curved hydrodynamic surfaces for minimizing turbulence in the surrounding water.

IPC Classes  ?

  • B63B 39/00 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude
  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore

68.

Active impedance matching systems and methods for wave energy converter

      
Application Number 11035323
Grant Number 07305823
Status In Force
Filing Date 2005-01-13
First Publication Date 2007-11-15
Grant Date 2007-12-11
Owner Ocean Power Technologies, Inc (USA)
Inventor
  • Stewart, David B.
  • Gerber, James S.

Abstract

The invention relates to active impedance matching systems (AIMS) and methods for increasing the efficiency of a wave energy converter (WEC) having a shaft and a shell intended to be placed in a body of water and to move relative to each other in response to forces applied to the WEC by the body of water. The system includes apparatus for: (a) extracting energy from the WEC and producing output electric energy as a function of the movement of the shell (shaft) relative to the shaft (shell): and (b) for selectively imparting energy to one of the shell and shaft for causing an increase in the displacement and velocity (or acceleration) of one of the shell and shaft relative to the other, whereby the net amount of output electrical energy produced is increased. The apparatus for extracting energy and for selectively supplying energy may be implemented using a single device capable of being operated bi-directionally, in terms of both direction and force, or may be implemented by different devices.

IPC Classes  ?

  • F03C 1/00 - Reciprocating-piston liquid engines

69.

IMPROVED WAVE ENERGY CONVERTER (WEC) WITH HEAVE PLATES

      
Application Number US2007010408
Publication Number 2007/130331
Status In Force
Filing Date 2007-04-30
Publication Date 2007-11-15
Owner OCEAN POWER TECHNOLOGIES, INC (USA)
Inventor
  • Powers, William, B.
  • Gerber, James
  • Bull, Diana

Abstract

The stability and power conversion efficiency of a wave energy converter (WEC) which includes a float, a spar and a power taken device (PTO) connected between the spar and the float is increased by connecting a heave plate to the spar in a very secure manner and by carefully limiting the movement between the float and spar to one direction (i.e., up-down motion). Buoyancy chambers may be attached to the WEC to facilitate its transportation and deployment. The WEC may be formed in sections and assembled at, or close to, the point of deployment.

IPC Classes  ?

  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member

70.

CELL BUOY SYSTEM

      
Document Number 02648183
Status In Force
Filing Date 2007-03-30
Open to Public Date 2007-10-18
Grant Date 2016-06-21
Owner OCEAN POWER TECHNOLOGIES, INC (USA)
Inventor Troutman, Joseph M.

Abstract

A cellular communication system includes an array of buoys disposed in a body of water. Each buoy includes a completer cellular system including a cellular transmission/reception site and associated electrical equipment for processing cellular signals. Each buoy also includes a wave energy converter (WEC) responsive to waves in the body of water for generating electrical energy for powering the associated equipment processing the cellular signals, whereby the cellular system can be continuously operated without any additional power source.

IPC Classes  ?

  • B63B 22/00 - Buoys
  • F03B 13/16 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member
  • H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
  • H01Q 1/34 - Adaptation for use in or on ships, submarines, buoys or torpedoes
  • H04W 16/26 - Cell enhancers, e.g. for tunnels or building shadow

71.

CELL BUOY SYSTEM

      
Application Number US2007008315
Publication Number 2007/117470
Status In Force
Filing Date 2007-03-30
Publication Date 2007-10-18
Owner OCEAN POWER TECHNOLOGIES, INC (USA)
Inventor Troutman, Joseph, M.

Abstract

A cellular communication system includes an array of buoys disposed in a body of water. Each buoy includes a completer cellular system including a cellular transmission/reception site and associated electrical equipment for processing cellular signals. Each buoy also includes a wave energy converter (WEC) responsive to waves in the body of water for generating electrical energy for powering the associated equipment processing the cellular signals, whereby the cellular system can be continuously operated without any additional power source.

IPC Classes  ?

72.

Cell buoy system

      
Application Number 11731380
Grant Number 07965980
Status In Force
Filing Date 2007-03-30
First Publication Date 2007-10-04
Grant Date 2011-06-21
Owner Ocean Power Technologies, Inc. (USA)
Inventor Troutman, Joseph M.

Abstract

A cellular communication system includes an array of buoys disposed in a body of water. Each buoy includes a completer cellular system including a cellular transmission/reception site and associated electrical equipment for processing cellular signals. Each buoy also includes a wave energy converter (WEC) responsive to waves in the body of water for generating electrical energy for powering the associated equipment processing the cellular signals, whereby the cellular system can be continuously operated without any additional power source.

IPC Classes  ?

73.

MOORING OF ARRAYS OF BUOY-LIKE WECS

      
Application Number US2007004877
Publication Number 2007/106323
Status In Force
Filing Date 2007-02-26
Publication Date 2007-09-20
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor Draper, Mark, R.

Abstract

For reducing the number of components required for mooring (by- means of three, 120° spaced apart mooring lines) multiple floating wave energy converters (WECs), a group of six WECs is disposed in a hexagonal pattern with each WEC being disposed at a corner of the hexagon. The WECs are connected to one another by mooring lines extending along sides of the hexagon, each WEC thereby being connected by two, 120° spaced apart mooring lines and with each WEC serving as a mooring point for each of its two adjacent neighbors. A third mooring line for each WEC, spaced 120° from the other two mooring lines, is connected to an auxiliary surface buoy and thence to an anchor.

IPC Classes  ?

  • B63B 22/22 - Inflatable buoys with gas generating means

74.

Wave energy converter utilizing internal reaction mass and spring

      
Application Number 11607386
Grant Number 07443046
Status In Force
Filing Date 2006-12-01
First Publication Date 2007-06-07
Grant Date 2008-10-28
Owner Ocean Power Technologies, Inc (USA)
Inventor
  • Stewart, David B.
  • Gerber, James S.

Abstract

A wave energy converter (WEC) includes a shell suitable for being placed within a body of water. The shell contains an internal oscillator comprising a “reaction mass” and a spring mechanism coupled between the reaction mass and the shell. The shell and internal oscillator are constructed such that, when placed in a body of water and in response to waves in the body of water, there is relative motion between the shell and the internal oscillator's mass. A power take-off (PTO) device is coupled between the internal oscillator and the shell to convert their relative motion into electric energy. In systems embodying the invention, the spring mechanism is designed such that its displacement or movement is less than the displacement or movement of the reaction mass. The spring mechanism may be any device which enables the reaction mass to undergo a given replacement while its displacement or movement is less than that of the reaction mass. This property enables the size of the WEC to be more readily controlled (e.g., made smaller).

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

75.

WAVE ENERGY CONVERTER UTILIZING INTERNAL REACTION MASS AND SPRING

      
Application Number US2006045907
Publication Number 2007/064827
Status In Force
Filing Date 2006-12-01
Publication Date 2007-06-07
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David, B.
  • Gerber, James, S.

Abstract

A wave energy converter (WEC) includes a shell (10) suitable for being placed within a body of water. The shell (10) contains an internal oscillator comprising a 'reaction mass' (20) and a spring mechanism (30) coupled between the reaction mass (20) and the shell (10). The shell (10) and internal oscillator are constructed such that, when placed in a body of water and in response to waves in the body of water, there is relative motion betweenl the shell (10) and the internal oscillator's mass (20). A power take-off (PTO) device (40) is coupled-between the internal oscillator and the shell (10) to convert their relative motion into electric energy. In systems embodying the invention, the spring mechanism (30) is designed such that its displacement or movement is less than the displacement or movement of the reaction mass (20). The spring mechanism (30) may be any device which enables the reaction mass to undergo a given replacement while its displacement or movement is less than that of the reaction mass (20). This property enables the size of the WEC to be more readily controlled (e.g., made smaller).

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

76.

WAVE ENERGY CONVERTER UTILIZING INTERNAL REACTION MASS AND SPRING

      
Document Number 02632158
Status In Force
Filing Date 2006-12-01
Open to Public Date 2007-06-07
Grant Date 2015-02-17
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David B.
  • Gerber, James S.

Abstract

A wave energy converter (WEC) includes a shell (10) suitable for being placed within a body of water. The shell (10) contains an internal oscillator comprising a "reaction mass" (20) and a spring mechanism (30) coupled between the reaction mass (20) and the shell (10). The shell (10) and internal oscillator are constructed such that, when placed in a body of water and in response to waves in the body of water, there is relative motion between1 the shell (10) and the internal oscillator's mass (20). A power take-off (PTO) device (40) is coupled-between the internal oscillator and the shell (10) to convert their relative motion into electric energy. In systems embodying the invention, the spring mechanism (30) is designed such that its displacement or movement is less than the displacement or movement of the reaction mass (20). The spring mechanism (30) may be any device which enables the reaction mass to undergo a given replacement while its displacement or movement is less than that of the reaction mass (20). This property enables the size of the WEC to be more readily controlled (e.g., made smaller).

IPC Classes  ?

  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy

77.

EXPANDABLE WAVE ENERGY CONVERSION SYSTEM

      
Application Number US2006033689
Publication Number 2007/027681
Status In Force
Filing Date 2006-08-28
Publication Date 2007-03-08
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Stewart, David, B.
  • Gerber, James, S.

Abstract

A wave energy converter (WEC) for converting energy contained in surface waves on a body of water to useful energy comprises two floats movable relative to one another in response to passing surface waves. Both floats comprise expandable outer envelopes which have been expanded into full and firm shape. In one process, expansion is obtained by filling the floats with fluids, for example, air and water. The fluids can be pumped into the floats, or the floats can be mechanically expanded in the presence of the fluids for self filling owing to pressure differentials. In one embodiment, a float envelope can comprise of plurality of end to end connected length sections in nested or telescoped relationship. Expansion is obtained by pulling the telescoped sections out from one and other, for example, by pumping fluids into the telescoped sections.

IPC Classes  ?

  • B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices

78.

Wave energy converters (WECs) with linear electric generators (LEGs)

      
Application Number 11081900
Grant Number 07323790
Status In Force
Filing Date 2005-03-15
First Publication Date 2006-09-21
Grant Date 2008-01-29
Owner Ocean Power Technologies, Inc. (USA)
Inventor
  • Taylor, George W.
  • Stewart, David B.

Abstract

An ocean wave energy converter (WEC) utilizes the relative motion between permanent magnet and induction coil assemblies to generate electricity. The permanent magnet assemblies and induction coil assemblies are separately housed in watertight enclosures, enabling a wide range of wave energy converter configurations, nearly unlimited stroke and obviating the need for a common magnet/coil enclosure with seals. The magnet assemblies are constructed with surface or buried magnets. The wave motion moves a magnet assembly relative to a stationary coil assembly, or vice versa. Either the magnet assembly or the induction coil assembly are made long enough to provide the generation of electricity over a desired operational range of travel. Various means are provided to maintain the spacing (“gap”) between the magnetic and coil assemblies relatively constant.

IPC Classes  ?

  • F03B 13/12 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy
  • F03B 13/10 - Submerged units incorporating electric generators or motors
  • H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator

79.

MAKING WAVES IN POWER

      
Serial Number 76664116
Status Registered
Filing Date 2006-08-04
Registration Date 2008-10-21
Owner OCEAN POWER TECHNOLOGIES, INC. ()
NICE Classes  ? 42 - Scientific, technological and industrial services, research and design

Goods & Services

design and development of systems for generating electrical power from wave energy

80.

ACTIVE IMPEDANCE MATCHING SYSTEMS AND METHODS FOR WAVE ENERGY CONVERTER

      
Document Number 02537106
Status In Force
Filing Date 2005-01-13
Open to Public Date 2005-08-04
Grant Date 2011-07-05
Owner OCEAN POWER TECHNOLOGIES, INC. (USA)
Inventor
  • Gerber, James S.
  • Stewart, David B.

Abstract

The invention relates to active impedance matching systems (AIMS) and methods for increasing the efficiency of a wave energy converter (WEC) having a shaft and a shell intended to be placed in a body of water and to move relative to each other in response to forces applied to the WEC by the body of water. The system includes apparatus for: (a) extracting energy from the WEC and producing output electric energy as a function of the movement of the shell (shaft) relative to the shaft (shell): and (b) for selectively imparting energy to one of the shell and shaft for causing an increase in the displacement and velocity (or acceleration) of one of the shell and shaft relative to the other, whereby the net amount of output electrical energy produced is increased. The apparatus for extracting energy and for selectively supplying energy may be implemented using a single device capable of being operated bi-directionally, in terms of both direction and force, or may be implemented by different devices.

IPC Classes  ?

  • F03B 13/18 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein the other member is fixed, at least at one point, with respect to the sea bed or shore