A hydraulic pressure supply unit has a storage chamber which stores hydraulic fluid, a hydraulic pump which is arranged within the storage chamber and dips at least partially into the stored hydraulic fluid, and an electric motor which drives the hydraulic pump. The electric motor is arranged below the hydraulic pump in a separate motor chamber which is situated below the storage chamber, is dry, and is not connected fluidically to the storage chamber. The electric motor is coupled in a thermally transmitting manner to a separating floor, the upper side of which delimits the storage chamber and is wetted continuously with stored hydraulic fluid.
In a mobile stretcher, in order to change the height position of a patient support mounted on a chassis, the chassis geometry is modifiable by a hydraulic drive system. The drive system includes a linear actuator, a pressure supply unit, and a receiving space for hydraulic fluid. A manually actuatable unlocking valve unit directly connects a lifting working chamber of the linear actuator to the receiving space. The valve unit has a control space delimited by a piston element movably guided relative to the housing of the valve unit and which communicates with a lifting attachment, which communicates with the working chamber. The piston element is operatively connected to a valve body interacting with a valve seat of a relief valve between the lifting attachment and a tank attachment communicating with the receiving space. A mechanical actuation input acts on the valve body, with a spring element interposed.
A hydraulic system has two hydraulic circuits, each with a pressure generating unit acting on an actuator unit. The generating units are slot-controlled radial piston pumps and form a pump assembly with a single common pump support and single common rotor. The rotor is rotatable on a free protruding section of a common support hub and has piston-receiving bores on axially offset planes. The hub has two first and two second fluid bores. The first bores communicate with first pump connections and first control openings on the hub on a first plane, and the second fluid bores communicate with second pump connections and second control openings on the hub on a second plane. A first and a second adjustment frame, each having an eccentric ring and acting on the pump pistons, are disposed on respective planes perpendicular to the main axis and independently guided in a linearly movable manner.
F04B 1/053 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
F04B 1/047 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
F04B 1/07 - Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
F04B 11/00 - Equalisation of pulses, e.g. by use of air vesselsCounteracting cavitation
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
F04B 53/16 - CasingsCylindersCylinder liners or headsFluid connections
F15B 7/00 - Fluid-pressure actuator systems in which the movement produced is definitely related to the output of a volumetric pumpTelemotors
F04B 1/0476 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders with two or more serially arranged radial piston-cylinder units located side-by-side
A passenger restraint device of a fairground ride passenger unit, having a passenger space, includes a position-adjustable restraint element and a lockable hydraulic adjuster which acts on the restraint element. The lockable hydraulic adjuster has a cylinder-piston unit and a hydraulic accumulator. The hydraulic accumulator and the cylinder-piston unit of the hydraulic adjuster form a structural unit with a cylinder of the cylinder-piston unit and a cylinder of the hydraulic accumulator arranged next to and parallel to each other as part of the integrated cylinder assembly. A common closure cover is provided on each end face of the integrated cylinder assembly. Please replace the specification with the attached substitute specification. A marked-up and clean version of the amended specification is submitted herewith.
A63G 7/00 - Up-and-down-hill tracks or switchbacks
B60R 21/00 - Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
A hydromechanical linear converter has a cylinder, a piston unit and a seat valve unit. The cylinder and a piston of the piston unit delimit a hydraulic working chamber, into which a working connection and a further fluid connection open, and has a supply connection 10. The valve unit switches between a first position connecting the supply connection to the fluid connection and a second position blocking the fluid connection from the supply connection. The linear converter includes a valve housing with a valve seat 16, a valve body with a valve head cooperating with the seat, a spring unit preloading the valve body into a position corresponding to the first position and an electromagnetic actuator 14 acting on the valve body 12 by purely mechanical action, to move the valve body against the force of the spring unit into a position corresponding to the second switching position.
A hydraulic pressure supply unit has a storage chamber which stores hydraulic fluid, a hydraulic pump which is arranged within the storage chamber and dips at least partially into the stored hydraulic fluid, and an electric motor which drives the hydraulic pump. The electric motor is arranged below the hydraulic pump in a separate motor chamber which is situated below the storage chamber, is dry, and is not connected fluidically to the storage chamber. The electric motor is coupled in a thermally transmitting manner to a separating floor, the upper side of which delimits the storage chamber and is wetted continuously with stored hydraulic fluid.
A hydraulic lifting column comprising a base structure, a head structure and a lifting structure. The lifting structure comprising a hydraulic power unit and hydraulic linear actuators extending between the base structure and the head structure, the hydraulic power unit acting on the hydraulic linear actuators. The lifting structure comprising four linear actuator units with a mutually parallel, vertically oriented working direction. Each linear actuator unit comprising a double cylinder having two-cylinder bores arranged next to one another and two piston structures with piston rods oriented parallel to one another and extendable in opposite directions from the double cylinder. The four lower piston rods are connected to the base structure at the corners of a first quadrilateral and the four upper piston rods are connected to the head structure at the corners of a second quadrilateral.
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
B66F 7/20 - Lifting frames, e.g. for lifting vehiclesPlatform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement
F15B 15/02 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
F15B 15/18 - Combined units comprising both motor and pump
A61G 13/06 - Adjustable operating tablesControls therefor raising or lowering of the whole table surface
A lifting device comprises a delivery direction-reversible hydraulic unit and at least three hydraulic lifting cylinders. The hydraulic cylinders are dimensioned in a stepped manner in such a way that the piston rod working space of an n-th lifting cylinder and the piston working space of an (n+1)-th lifting cylinder, with n from 1 to z−1, wherein z indicates the number of hydraulic lifting cylinders of the lifting device, have the same effective area. The at least three lifting cylinders are hydraulically connected in series in such a way that the respective working spaces with the same effective area are directly fluidically coupled by means of a hydraulic connection. The piston working space of the first lifting cylinder and the piston rod working space of the z-th lifting cylinder are in fluid connection with the connections of the delivery direction-reversible hydraulic unit.
B66F 7/08 - Lifting frames, e.g. for lifting vehiclesPlatform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
B66F 9/06 - Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
G05D 1/02 - Control of position or course in two dimensions
B65G 1/06 - Storage devices mechanical with means for presenting articles for removal at predetermined position or level
G05D 1/00 - Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
B60T 1/14 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting otherwise than by retarding wheels, e.g. jet- action directly on road
F16D 63/00 - Brakes not otherwise provided forBrakes combining more than one of the types of groups
The passenger-retaining device (2) of a fairground ride passenger unit, which furthermore has a passenger receptacle (1), comprises a positionally variable retaining element (6) and, acting thereon, a lockable hydraulic adjuster (10) having a cylinder-piston unit (11) and a hydraulic accumulator (12). Here, the hydraulic accumulator (12) and the cylinder-piston unit (11) of the hydraulic adjuster (10) form a structural unit in that the cylinder (19) of the cylinder-piston unit (11) and a cylinder (14), arranged next to and parallel to the latter, of the hydraulic accumulator (12) are part of an integrated cylinder assembly (21) which comprises, on both sides, a respective common closure cover.
In a mobile stretcher, in order to change the height position of a patient support mounted on a chassis, the geometry of the chassis is modifiable by means of a hydraulic drive system. The latter comprises a linear actuator, a pressure supply unit, and a receiving space for hydraulic fluid, and it moreover has a manually actuatable unlocking valve unit (14) for the direct connection of a stroke working space of the linear actuator to the receiving space for hydraulic fluid. The unlocking valve unit (14) has a control space (28), which is delimited by a piston element (30) guided movably relative to the housing (21) of the valve unit and which communicates with the stroke attachment (23) communicating with the stroke working space. The piston element (30) is operatively connected here to a valve body (27) which interacts with a valve seat (26) of a relief valve (16) configured between the stroke attachment (23) and a tank attachment (25) communicating with the receiving space (6). Moreover, a mechanical actuation input (35) of the valve unit (14) acts on the valve body (27), with interpositioning of a spring element (40).
F15B 13/01 - Locking-valves or other detent devices
A61G 7/012 - Beds specially adapted for nursingDevices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame
The invention relates to a hydraulic system comprising two hydraulic circuits, each of which comprises a pressure generating unit that acts on an actuator unit with a reversible pump direction. The first and the second pressure generating unit is designed as a slot-controlled radial piston pump (22, 23). The radial piston pumps form a pump assembly (24) with a single common pump support (25) and a single common rotor (33) which is mounted on a free protruding section (32) of a common pump support hub (27) fixed on one side in a rotatable manner about a main axis (X) and has pump piston bores (36) that are arranged on two axially offset planes and are used to receive oscillating pump pistons (35). The pump support hub (27) has two first fluid bores and two second fluid bores (56), wherein the two first fluid bores communicate with two first pump connections and two first control openings arranged on the pump support hub (27) on a first pump piston plane, and the two second fluid bores (56) communicate with two second pump connections and two second control openings (59) arranged on the pump support hub (27) on a second pump piston plane. A first adjustment frame (37) and a second adjustment frame (42), each of which comprises an eccentric ring (39) that is received in the frame and acts on the pump pistons (35), are received in the pump support (25) on a respective plane perpendicular to the main axis (X) so as to be guided in a linearly movabe manner independently of each other.
F04B 1/053 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
F04B 11/00 - Equalisation of pulses, e.g. by use of air vesselsCounteracting cavitation
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
F04B 53/16 - CasingsCylindersCylinder liners or headsFluid connections
F04B 1/047 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
F04B 1/07 - Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
The invention relates to a human exoskeleton provided for coupling to a human body, comprising a first skeletal structure (1) with a first coupling unit (6) which is suitable for coupling to a first part (4) of the human body, a second skeletal structure (3) which is connected to the first skeletal structure in an articulated manner and which comprises a second coupling unit (9) that is suitable for coupling to a second part (7) of the human body, and an adjustment unit (10) which acts between the first skeletal structure (1) and the second skeletal structure (3) and which comprises at least one hydraulic actuator unit (11) and a hydraulic assembly (12) that acts on the actuator unit and has two pump connections (21a, 21b). The hydraulic assembly (12) is designed such that the delivery rate can be adjusted, and a first pump connection (21a) is fluidically connected to a working chamber (A) of the actuator unit (11) via a pressure line (18a) as well as to the second pump connection (21b) via a discharge line (23, 23a), through which a fluid flows when said working chamber (A) is pressurized and into which a flow throttle (24, 24a) is integrated, and via a settling tank (22) connected downstream of the discharge line.
An electrohydraulic drive unit is provided, comprising a cylinder-piston assembly having a piston-side first hydraulic working chamber and a piston-rod-side second hydraulic working chamber, a tank, a hydraulic pump, which can be driven at variable rotational speed and which has a tank connection point and a working connection point, a valve assembly, which is connected between the working connection point of the hydraulic pump and the cylinder-piston assembly, and an anti-cavitation valve, which is connected between the tank and the first hydraulic working chamber; and a machine controller. Switching valves of the valve assembly can be switched between loading of the first hydraulic working chamber and loading of the second hydraulic working chamber of the cylinder-piston assembly during pumping operation of the hydraulic pump from the working connection point of the hydraulic pump by the machine controller.
F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
B30B 15/20 - Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
F15B 1/02 - Installations or systems with accumulators
F15B 1/027 - Installations or systems with accumulators having accumulator charging devices
An electrohydraulic linear actuator comprises a housing consisting of a tubular profile, which forms a housing shell and in which there is a plurality of cavities, and which is closed at the ends by two housing covers fitted to the ends of the housing shell. A first cavity of the tubular profile forms a cylinder which forms the hydraulic cylinder of a double-acting synchronous cylinder and a second cavity which extends parallel to the first cavity accommodates a hydraulic unit in addition to the hydraulic cylinder, and a hydraulic oil reservoir is formed in said second cavity. Two working chambers of the hydraulic cylinder are separated from each other by a piston unit. The housing has at least one through-hole for a coupling element which forms a mechanical interface with the piston unit. The electric motor of the hydraulic unit is configured as a brushless outrunner motor.
F15B 15/18 - Combined units comprising both motor and pump
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
F15B 15/28 - Means for indicating the position, e.g. end of stroke
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Instruments hydrauliques destinés aux techniques de
manipulation dans le domaine médical, notamment pour les
tables d'opérations et les fauteuils de soins, pour les
machines de fabrication et les machines automatiques de
manipulation, pour les installations d'élévation et de
transport. Instruments hydrauliques destinés aux techniques de
manipulation pour les véhicules de locomotion terrestres,
aériens et nautiques.
HAWE Altenstadt Holding GmbH210384 PWO gilggll GSKHJune 28, 2019ABSTRACTThe chassis of a transportable device comprises a base structure, four casters arranged thereon, four lowerable and raiseable support feet also mounted on the base structure, and a hydraulic support foot actuating device. The hydraulic support foot actuating device has a reservoir (1), a pump (2) manually operable by hand or foot, four support foot linear actuators (3) and a purely hydro-mechanical pipe and valve arrangement (4) which connects the reservoir (1), the pump (2) and the linear actuators (3) to one another. Therein, by means of hydraulic fluid delivered by the pump (2) from the reservoir (1) the two support feet assigned to two primary linear actuators (3a) can be fully extended until a mechanical stop is reached while raising the base structure by first applying pressure to the two primary linear actuators (3a) before applying pressure to the two other, secondary linear actuators (3b).Date Recue/Date Received 2020-11-05
