Abstract

A system for axially preloading a component, comprising a housing and a component disposed radially internal to the housing. The housing comprises a threaded inner circumferential surface with a first thread pitch (Pl). The system further comprises an outer annulus radially inward of the housing, comprising a threaded outer circumferential surface with a thread pitch substantially equal to the first thread pitch (Pl) and a threaded inner circumferential surface with a second thread pitch (P2) and an inner annulus radially inward of the outer annulus, comprising a threaded outer circumferential surface with a thread pitch substantially equal to the second thread pitch (P2). The housing is provided with a first number (Nl) of keyways disposed around its circumference. The outer annulus is provided with a second number (N2) of keyways disposed around its circumference. The inner annulus is provided with a third number (N3) of keyways disposed around its circumference. The outer annulus is configured to rotate with respect to the housing to enable alignment of a keyway provided in the outer annulus and a keyway in the housing. The inner annulus is configured to rotate with respect to the outer annulus to enable alignment of a keyway provided in the inner annulus and a keyway in the outer annulus. The inner annulus is configured to be translated axially towards the component upon rotation of the outer annulus when the inner annulus and the housing are rotationally locked to one another.

IPC Classes  ?

• F16B 39/02 - Locking of screws, bolts, or nuts in which the locking takes place after screwing down
• F16B 39/04 - Locking of screws, bolts, or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, wedge, cotter-pin, screw
• F16C 35/067 - Fixing them in a housing
• F16C 41/00 - Other accessories for bearings

Abstract

There is provided a rotary mechanism (202) comprising an earth annulus (220a), an output annulus (230), a radially inner bearing race formed on or by one of the earth annulus and the output annulus (220a, 230), a radially outer bearing race partially formed on or by the other of the earth annulus and the output annulus (230, 220a), an opening (262a) in the other of the earth annulus and the output annulus (230, 220a), and a removable cap (100) configured to be received by the other of the earth annulus and the output annulus (230, 220a) to form a raceway (240a) with the radially inner bearing race and the radially outer bearing race and to close the opening (262a), the raceway (240a) extending circumferentially and between the earth annulus (220a) and the output annulus (230b). The earth annulus (220a) is rotatable relative to the output annulus (230). A plurality of bearings (250) is received in the raceway (240a). The plurality of bearings (250) is insertable into and/or removable from the raceway (240a) via the opening (262a) when the removable cap (100) is removed. The removable cap (100) is configured to be radially retained by an annular component extending at least partially around the other of the earth annulus and the output annulus (230, 220a).

IPC Classes  ?

• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• F16C 33/60 - RacewaysRace rings divided
• F16C 33/72 - Sealings
• F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear

Abstract

A strain wave gear comprising: a wave generator configured to contact a spline, the wave generator being rotatable; and a coupler configured to couple a driver shaft to the wave generator, the coupler permitting displacement of the driver shaft relative to the wave generator.

IPC Classes  ?

• F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
• F16H 35/00 - Gearings or mechanisms with other special functional features
• F16H 49/00 - Other gearing

Abstract

A rotary mechanism includes: an earth annulus, an output annulus, a radially inner bearing race formed on or by one of the earth annulus and the output annulus, a radially outer bearing race partially formed on or by the other of the earth annulus and the output annulus, an opening in the other of the earth annulus and the output annulus, and a removable cap configured to be received by the other of the earth annulus and the output annulus to form a raceway with the radially inner bearing race and the radially outer bearing race and to close the opening. The raceway extends circumferentially and between the earth annulus and the output annulus. The earth annulus is rotatable relative to the output annulus. A plurality of bearings is received in the raceway and is insertable into and removable from the raceway via the opening when the cap is removed.

IPC Classes  ?

• F16H 19/08 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion

Abstract

A hydraulic rotary gearless actuator is provided. The hydraulic gearless actuator includes an input stage and an output stage. The input stage includes a piston linearly translatable within an input cylinder. The output stage includes first and second output cylinders defining first and second tracks, respectively, and a trunnion assembly connected to the piston and including first and second rollers engageable with the first and second tracks, respectively. The output stage is configured to convert linear translation of the piston into rotation of the first output cylinder relative to the second output cylinder by the trunnion assembly being driven linearly by the linear translation of the piston and the first and second rollers engaging with the first and second tracks, respectively.

IPC Classes  ?

• F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement

Abstract

A rotary actuator assembly for moving a first relatively movable part relative to a second relatively movable part. The assembly includes: a rotary actuator having a plurality of annular earth members for attachment to one of the first and the second relatively movable parts and one or more annular output members for attachment to the other of the first and second relatively movable parts. The annulus of the earth members and the one or more output members are coaxial defining a lumen through the rotary actuator along an actuator axis A. The assembly also includes at least one rotary motor arranged to rotate the annular output member relative to the annular earth members, about the actuator axis A. The rotary actuator also includes a rod extending through the lumen and extending axially beyond the earth members.

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

A system for axially preloading a component includes: a housing and a component disposed radially internal to the housing. The housing includes a threaded inner circumferential surface with a first thread pitch (P1). The system further includes an outer annulus radially inward of the housing that a threaded outer circumferential surface with a thread pitch substantially equal to the first thread pitch (P1) and a threaded inner circumferential surface with a second thread pitch (P2) and an inner annulus radially inward of the outer annulus, that includes a threaded outer circumferential surface with a thread pitch substantially equal to the second thread pitch (P2). The housing is provided with a first number (N1) of keyways disposed around its circumference. The outer annulus is provided with a second number (N2) of keyways disposed around its circumference. The inner annulus is provided with a third number (N3) of keyways around its circumference.

IPC Classes  ?

• F16C 43/04 - Assembling rolling contact bearings

Abstract

A strain wave drive includes: an elliptical wave generator shaft rotatable about an axis (X); a flexible flex spline mounted around the wave generator shaft; a ring gear assembly mounted around the flex spline, the ring gear assembly comprising an output ring gear having a circular inner periphery and being sandwiched between two earth ring gears each having a circular inner periphery. The flex spline has a first set of a first number of radially outwardly extending teeth around its outer periphery. Each earth ring gear has the first number of radially inwardly extending teeth to engage with the first set of teeth of the flex spline. The flex spline has a second set of the first number of radially outwardly extending teeth around its outer periphery wherein the output ring gear has a second number of radially inwardly extending teeth.

IPC Classes  ?

• F16H 49/00 - Other gearing
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical

Abstract

A control scheme for starting a dual channel permanent magnet motor drive system under a one-switch short circuit (OSSC) fault on one channel in which the reference torque used for controlling the faulty channel is varied as a function of motor speed according to a certain predefined function to optimise the torque produced by the faulty channel whilst also keeping the current within the faulty channel below the current limit of the power inverter within the faulty channel.

IPC Classes  ?

• H02P 21/34 - Arrangements for starting
• H02P 21/30 - Direct torque control [DTC] or field acceleration method [FAM]

Abstract

A control scheme for starting a dual channel permanent magnet motor drive system under a one-switch short circuit (OSSC) fault of one channel. The power inverter topology is selected such that in the event of an OSSC fault affecting a channel, the power inverter is operable to produce intermittent assistive torque using the remaining switches. During start-up, before driving the rotor in continuous rotation, the rotor is moved from its initial angular position to a position where it can provide assistive torque. In this way, the rotor position can be optimised to achieve the benefit of the assistive torque from the faulty channel, thus allowing start-up under overload conditions.

IPC Classes  ?

• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A method for driving a tilt rotor between vertical and horizontal using a variable displacement motor controlled in response to a swash angle of the motor measured in a feedback loop. The loop includes an algorithm configured to monitor change in swash angle as the motor speed reduces and the actual tilt position of the rotor pylon approaches the second position and, based on the change and actual tilt position, to limit change in swash angle to be within a predetermined range as a percentage of the operating load.

IPC Classes  ?

• B64C 27/605 - Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical including swash plate, spider or cam mechanisms
• B64C 27/32 - Rotors
• B64C 27/52 - Tilting of rotor bodily relative to fuselage
• B64C 27/57 - Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement characterised by the control initiating means, e.g. manually actuated automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust
• B64C 27/64 - Transmitting means, e.g. interrelated with initiating means or means acting on blades using fluid pressure, e.g. having fluid power amplification
• B64C 29/00 - Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft
• B64F 5/60 - Testing or inspecting aircraft components or systems

Abstract

A strain wave gear system includes a circular spline arranged around a longitudinal axis, a flexible spline within and coaxial with the circular spline and a wave generator within and coaxial with the flexible spline. The wave generator is non-circular in a plane perpendicular to the longitudinal axis. The flexible spline is arranged to flex in response to rotation of the wave generator. The wave generator is configured to rotate about the longitudinal axis such that the flexible spline is arranged to selectively engage with the circular spline. The strain wave gear system further includes a bearing arrangement between and coaxial with the wave generator and the flexible spline. The bearing arrangement comprises a plurality of bearings and a cage arranged to retain the plurality of bearings. The plurality of bearings are located at more than two axial positions within the cage.

IPC Classes  ?

• F16H 49/00 - Other gearing

Abstract

An actuation system comprises a plurality of actuators, a common power drive unit for driving the actuators and a transmission line transmitting drive from the common drive unit to the plurality of actuators. A clutch is arranged in the transmission line between the power drive unit and the plurality of actuators for selectively disconnecting the power drive unit from the plurality of actuators. At least one sensor is provided for sensing an abnormal load condition in the actuation system. The at least one sensor is operatively coupled to a clutch control which is configured such that when the at least one sensor senses an abnormal load condition, the clutch control is operative to disengage the clutch so as to disconnect the power drive unit from the plurality of actuators. A brake is operative to brake the actuators upon disengagement of the clutch.

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• B64C 9/26 - Adjustable control surfaces or members, e.g. rudders forming slots at the front of the wing by multiple flaps
• F16H 61/12 - Detecting malfunction or potential malfunction, e.g. fail safe

Abstract

A bus controller-based programmable logic device (PLD) architecture is provided and includes a dual-port unit interposed between bus controllers. The dual port unit includes first and second data transfer layers. The first data transfer layer includes write and read areas for data transfer between the first and second bus controllers, respectively. A write to the read area is prevented during a read by the second bus controller. The second data transfer layer includes read and write areas for data transfer between the first and second bus controllers, respectively. A write to the read area is prevented during a read by the first bus controller.

IPC Classes  ?

• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Abstract

A rotary actuator includes: a shaft; a first threaded portion and a second threaded portion formed on the shaft and axially spaced from each other. A first nut is mounted for movement along the first threaded portion and a second nut is mounted for movement along the second threaded portion. A plurality of first and second components extend radially outward from the first and second nut. An earth sleeve and an output sleeve extend around the shaft and the first and second nuts. The shaft is configured to be driven to rotate about a longitudinal axis thereof relative to the earth sleeve. The earth sleeve comprises a plurality of axially extending earth guides. The output sleeve comprises a plurality of first guides and a plurality of second guides. Each first component engages with a respective first guide and a respective earth guide for movement there along.

IPC Classes  ?

• F16H 25/20 - Screw mechanisms
• B64C 13/50 - Transmitting means with power amplification using electrical energy

Abstract

An actuator includes an input shaft, a wave generator, a pair of flex splines, a pair of earth annuli, and an output annulus. Each of the pair of flex splines are earthed to an earth annulus. The output annulus comprises a circular spline. The wave generator is configured to be activated by rotation of the input shaft, and the wave generator is configured to elastically deform both of the pair of flex splines when the input shaft activates the wave generator.

IPC Classes  ?

• F16H 19/08 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16H 49/00 - Other gearing

Abstract

A strain wave gear includes a wave generator configured to contact a spline, the wave generator being rotatable. The strain wave gear also includes a coupler configured to couple a driver shaft to the wave generator. The coupler permits displacement of the driver shaft relative to the strain wave generator.

IPC Classes  ?

• F16H 57/022 - Adjustment of gear shafts or bearings
• F16H 49/00 - Other gearing

Abstract

A two-stage servo valve comprising a first drive stage and a second fluid transfer stage. The fluid transfer stage includes a housing having a plurality of ports and a spool axially moveable within an axial cavity defined within the housing to control flow of fluid between the plurality of ports according to the axial position of the spool, wherein the drive stage is configured to cause axial movement of the spool. The housing has three ports, a first port being a supply port fluidly connected to a second port, being a control port, via a supply channel (sc) and a first control channel (cc1) via the spool cavity, and a third port being a return port fluidly connected to the control port via a return channel (rc) and a second control channel (cc2) via the spool cavity.

IPC Classes  ?

• F15B 13/043 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves

Abstract

A two-stage servo valve comprising a first, drive stage (11) and a second fluid transfer stage, the fluid transfer stage comprising a housing (140) having a plurality of ports (70, 80, 90) and a spool (50) axially moveable within an axial cavity (142) defined within the housing to control flow of fluid between the plurality of ports according to the axial position of the spool, wherein the drive stage is configured to cause axial movement of the spool; wherein the housing comprises three ports, a first port being a supply port fluidly connected to a second port, being a control port, via a supply channel (sc) and a first control channel (cc1) via the spool cavity, and a third port being a return port fluidly connected to the control port via a return channel (rc) and a second control channel (cc2) via the spool cavity, and wherein the spool comprises a middle portion (53) and first and second end portions (51a, 51b), a first opening (52) defined between a first edge (K1) of the middle portion and the first end portion and a second opening (54) defined between a second edge (L1) of the middle portion and the second end portion, the first and second openings (52, 54) being sized such that in a neutral position, the first opening (52) does not overlap both the supply channel and the first control channel and the first edge K1 is positioned to prevent fluid flow between the supply channel and the first control channel and the second opening (54) does not overlap both the return channel and the second control channel and the second edge L1 is positioned to prevent fluid flow between the second control channel and the return channel; in a first axial position, the first edge K1 is positioned such that the first opening (52) overlaps at least a portion of both the supply channel and the first control channel to allow fluid flow between the supply channel and the first control channel, and the second opening (54) does not overlap both the return channel and the second control channel and the second edge L1 is positioned to prevent fluid flow between the second control channel and the return channel; and in a second axial position, the second edge L1 is positioned such that the second opening (54) overlaps at least a portion of both the return channel and the second control channel to allow fluid flow between the return channel and the second control channel, and the first opening (52) does not overlap both the supply channel and the first control channel and the first edge K1 is positioned to prevent fluid flow between the supply channel and the first control channel.

IPC Classes  ?

• F16K 1/24 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
• F16K 21/00 - Fluid-delivery valves
• F16K 31/00 - Operating meansReleasing devices

Abstract

A strain wave gearing system is includes: wave generator; a rigid spline; a flex spline disposed between the wave generator and the rigid spline; and a coupling element. The flex spline comprises a first mating element. The coupling element comprises a second mating element. The coupling element and the flex spline are mated by cooperation of the first mating element and the second mating element so as to prevent rotational motion of the flex spline relative to the coupling element. The first mating element is movable relative to the second mating element to thereby permit deformation of the flex spline relative to the coupling element.

IPC Classes  ?

• F16H 49/00 - Other gearing
• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing

Abstract

A strain wave gearing system (100) is provided comprising a wave generator (110); a rigid spline; a flex spline (120) disposed between the wave generator (110) and the rigid spline; and a coupling element (130). The flex spline (120) comprises a first mating element (124). The coupling element (130) comprises a second mating element (132). The coupling element (130) and the flex spline (120) are mated by cooperation of the first mating element (124) and the second mating element (132) so as to prevent rotational motion of the flex spline (120) relative to the coupling element (130). The first mating element (124) is movable relative to the second mating element (132) to thereby permit deformation of the flex spline (120) relative to the coupling element (130).

IPC Classes  ?

• F16H 1/28 - Toothed gearings for conveying rotary motion with gears having orbital motion
• F16H 49/00 - Other gearing

Abstract

A braking device for a flight control system includes a drive shaft for applying a drive torque to a flight control surface. The braking device comprises a housing component comprising a first braking surface. The system also includes a trolley having a second braking surface configured to contact the first braking surface to provide a braking torque. The trolley is configured to receive an input torque from the drive shaft, wherein the trolley is configured to apply a contact force between the first and second braking surfaces in response to the input torque. Also provided is a flight control system comprising the braking device and a drive shaft for applying a drive torque to a flight control surface, and an aircraft comprising the flight control system.

IPC Classes  ?

• B60T 8/17 - Using electrical or electronic regulation means to control braking
• B60T 13/66 - Electrical control in fluid-pressure brake systems
• B64C 25/44 - Actuating mechanisms

Abstract

A braking device for a flight control system is provided, the flight control system comprising a drive shaft for applying a drive torque to a flight control surface. The braking device comprises a housing component comprising a first braking surface; and a trolley comprising a second braking surface configured to contact the first braking surface to provide a braking torque. The trolley is configured to receive an input torque from the drive shaft, wherein the trolley is configured to apply a contact force between the first and second braking surfaces in response to the input torque. Also provided is a flight control system comprising the braking device and a drive shaft for applying a drive torque to a flight control surface, and an aircraft comprising the flight control system as described above.

IPC Classes  ?

• B64C 9/32 - Air braking surfaces
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical

Abstract

A ball nut and screw assembly includes a screw, and a nut received on the screw. A first raceway having a helical portion is defined between a convex groove of the screw and a concave groove of the nut. The first raceway has adjacent concave grooves to provide said helical portion. A first plurality of balls are in said first raceway, and a first radial outboard raceway is provided at a first end of the first raceway and a second radial outboard raceway provided at a second end of said first raceway. The first and second outboard radial raceways are formed between a concave groove formed in a first outboard component and the outermost, external surface of the screw that is in a position between said adjacent grooves of said screw and at least a first bearing ball is provided in said first radial outboard raceway.

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

Abstract

A ball nut and screw assembly is described herein comprising: a screw (15), anda nut (11) received on the screw (15), a first raceway (16) having a helical portion defined between a convex groove of the screw (15) and a concave groove of the nut (11); said first raceway (16) having adjacent concave grooves to provide said helical portion, a first plurality of balls (13) provided in said first raceway (16), and further comprising a first radial outboard raceway (18) provided at a first end of said first raceway (16) and a second radial outboard raceway (19) provided at a second end of said first raceway (16), and wherein said first and second outboard radial raceways (18, 19) are formed between a concave groove formed in a first outboard component (20a) and the outermost, external surface of the screw (15) that is in a position between said adjacent grooves of said screw (15) and at least a first bearing ball (13a) provided in said first radial outboard raceway (18) and at least a second bearing ball (13b) provided in said second radial outboard raceway (19).

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members

Abstract

A drive for a harmonic gear assembly, comprising an input shaft having a shaft axis (A) and an epicyclic carrier unit removably mounted around, and coaxial with the input shaft, the epicyclic carrier unit comprising a carrier having an interior circumference designed to match the outer circumference of the shaft and further comprising a first roller assembly mounted at a first location around the circumference of the carrier unit and comprising a first roller shaft extending substantially parallel to the shaft axis and a first roller rotatably mounted around the first rotor shaft, and a second roller assembly mounted at a second location around the circumference of the carrier unit and comprising a second roller shaft extending substantially parallel to the shaft axis and a second roller rotatably mounted around the second rotor shaft, the first and second rollers extending radially outwards from the carrier to define a major axis between the radially outer surfaces of the first and second rollers, and wherein the outer surface of the carrier unit at locations other than the first and second locations defines a minor axis.

IPC Classes  ?

• F16H 49/00 - Other gearing
• F16H 19/08 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
• B64C 13/02 - Initiating means

Abstract

A drive for a harmonic gear assembly, comprising an input shaft having a shaft axis (A) and an epicyclic carrier unit removably mounted around, and coaxial with the input shaft, the epicyclic carrier unit comprising a carrier (40) having an interior circumference designed to match the outer circumference of the shaft and further comprising a first roller assembly (42a, 50a) mounted at a first location around the circumference of the carrier unit and comprising a first roller shaft (42a) extending substantially parallel to the shaft axis and a first roller (50a) rotatably mounted around the first rotor shaft, and a second roller assembly mounted at a second location around the circumference of the carrier unit and comprising a second roller shaft (42b) extending substantially parallel to the shaft axis and a second roller (50b) rotatably mounted around the second rotor shaft, the first and second rollers extending radially outwards from the carrier to define a major axis between the radially outer surfaces of the first and second rollers, and wherein the outer surface of the carrier unit at locations other than the first and second locations defines a minor axis:

IPC Classes  ?

• B64C 13/24 - Transmitting means
• F16H 1/10 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes one of the members being internally toothed
• F16H 49/00 - Other gearing

Abstract

A computer implemented method (400, 401) for testing a rescue hoist is described herein, wherein the hoist comprises a motor drive train (10). The motor drive train (10) comprising: a primary load brake (13), a secondary load brake (20) and a cable drum (18) comprising a cable. The method (400, 401) comprises the steps of: reeling (420) the cable out of the cable drum (18) followed by reeling the cable in at a speed that is sufficient to disengage the primary load brake (13) and verifying (430) that the cable drum (18) is rotating. If it is verified that the cable drum is rotating, the method further comprises the step of decreasing the motor torque output (450, 455), before engaging (470) the secondary brake (21). The method further comprises the step of verifying that said cable drum (18) has stopped rotating (480), and if it is verified that the cable drum (18) has stopped rotating, disengaging the secondary brake (21), restoring torque motor output (500) and then reeling said cable is reeled in to the homed position 510 and the test is confirmed to have been passed (520). This computer implemented method can be performed by a controller that has been configured to carry out these method steps.

Abstract

A method for testing a rescue hoist that includes motor drive train. The motor drive train includes: a primary load brake, a secondary load brake and a cable drum comprising a cable. The method includes: reeling the cable out of the cable drum followed by reeling the cable in at a speed that is sufficient to disengage the primary load brake and verifying that the cable drum is rotating. When verified that the cable drum is rotating, the method further comprises the step of decreasing the motor torque output, before engaging the secondary brake. The method further comprises the step of verifying that said cable drum has stopped rotating, and if it is verified that the cable drum has stopped rotating, disengaging the secondary brake, restoring torque motor output and then reeling said cable is reeled into the homed position and the test is confirmed to have been passed.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• B66D 3/18 - Power-operated hoists

Abstract

A skew sensing apparatus for detecting skew in at least one, or a plurality of control surfaces of a vehicle. The apparatus includes a tension cord which is held under tension between a) a first spring associated with a sensor and a sensor target and b) an opposing second spring. During normal operation, the apparatus is configured to maintain said sensor target in a first position relative to said sensor, thereby indicating said normal operation. During an abnormal operation, the apparatus is configured to shunt said tension cord such that said sensor target is translated to a second position, relative to said sensor thereby indicating said abnormal status.

IPC Classes  ?

• B64D 45/00 - Aircraft indicators or protectors not otherwise provided for

Abstract

A skew sensing apparatus (100) for detecting skew in at least one, or a plurality of control surfaces (1) of a vehicle is described herein; comprising a tension cord (20) which is held under tension between a) a first spring (14) associated with a sensor (17) and a sensor target (16) and b) an opposing second spring (15) and wherein during normal operation, said apparatus is configured to maintain said sensor target (16) in a first position relative to said sensor (17), thereby indicating said normal operation, and wherein, in an abnormal operation, said apparatus is configured to shunt said tension cord (20) such that said sensor target (16) is translated to a second position, relative to said sensor (17) thereby indicating said abnormal status.

IPC Classes  ?

• B64C 13/24 - Transmitting means
• B64D 45/00 - Aircraft indicators or protectors not otherwise provided for
• G07C 11/00 - Arrangements, systems or apparatus for checking, e.g. the occurrence of a condition, not provided for elsewhere

Abstract

A drive system for an actuator comprises first and second motors, and first and second input shafts connected to be driven by the respective first and second motors. Each of the first and second input shafts comprises a first overrunning clutch configured to rotate with the input shaft in a first direction, and a second overrunning clutch configured to rotate with the input shaft in a second direction. A first drive gear is configured to be driven by either one of the first overrunning clutches, and a second drive gear is configured to be driven by either one of the second overrunning clutches, and an output clutch and an output shaft are arranged to be driven by the first drive gear in a first mode of operation of the drive system and be driven by the second drive gear in a second mode of operation of the drive system.

IPC Classes  ?

• F16H 19/02 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion
• F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
• F16D 13/24 - Friction clutches with axially-movable clutching members with conical friction surfaces
• F16D 41/16 - Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like the action being reversible
• B64C 13/38 - Transmitting means with power amplification

Abstract

A drive system (2) for an actuator comprises first and second motors (4, 6), and first and second input shafts (14, 16) connected to be driven by the respective first and second motors (4, 6). Each of the first and second input shafts (14, 16) comprises a first overrunning clutch (46a, 46b) configured to rotate with the input shaft (14, 16) in a first direction, and a second overrunning clutch (46c, 46d) configured to rotate with the input shaft (14, 16) in a second direction. A first drive gear (60) is configured to be driven by either one of the first overrunning clutches (46a, 46b), and a second drive gear (62) is configured to be driven by either one of the second overrunning clutches (46c, 46d), and an output clutch (64) and an output shaft (18) are arranged to be driven by the first drive gear (60) in a first mode of operation of the drive system (2) and be driven by the second drive gear (62) in a second mode of operation of the drive system (2).

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• F16H 1/22 - Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shaftsToothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with arrangements for dividing torque between two or more intermediate shafts
• F16H 29/00 - Gearings for conveying rotary motion with intermittently-driving members, e.g. with freewheel action

Abstract

An actuator assembly includes a compliant actuator shaft having an axis (A) and a first end and a second end, a drive assembly provided at the first end of the compliant actuator shaft to cause rotation of the compliant actuator shaft about the axis and an overtravel stop mechanism. The overtravel stop mechanism includes: a screw shaft mounted to and arranged to rotate with the second end of the compliant actuator shaft, the screw shaft having an outer thread extending in the axial direction; a nut threadedly mounted to the outer thread of the screw shaft that moves axially relative to the screw shaft as the screw shaft rotates; a first stop fixed to and radially extending from the screw shaft to define the axial limit of movement of the nut relative to the screw shaft, in a first axial direction.

IPC Classes  ?

• F16H 25/20 - Screw mechanisms

Abstract

An actuator assembly comprising: a compliant actuator shaft (12) having an axis (A) and a first end (12a) and a second end (12b); a drive assembly (30, 32, 34) provided at the first end of the compliant actuator shaft to cause rotation of the compliant actuator shaft about the axis; an overtravel stop mechanism (20) comprising: a screw shaft (14), coaxial with the compliant actuator shaft (12), and mounted to and arranged to rotate with the second end of the compliant actuator shaft, the screw shaft having an outer thread (16) extending in the axial direction; a nut (60) threadedly mounted to the outer thread (16) of the screw shaft and arranged to move axially relative to the screw shaft as the screw shaft rotates; a first stop (40a) fixed to and radially extending from the screw shaft to define the axial limit of movement of the nut relative to the screw shaft, in a first axial direction, as the screw shaft rotates, by abutment of the nut (60) against the first stop (40a); and wherein the first end (12a) of the compliant actuator shaft (12) is provided with a first number n of splines (36) for spline engagement with the drive assembly and the second end (12b) of the compliant actuator shaft is provided with a second number of splines (38), the second number being one spline more than the first number of splines, for spline engagement with the screw shaft.

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16H 25/20 - Screw mechanisms

Abstract

An actuator arrangement includes an actuator screwshaft configured to receive a female connector, a lockpin having a male connector that is connected to the female connector. When the actuator screwshaft is rotated, in use, the lockpin is configured to move from a first position to a second position.

IPC Classes  ?

• F16B 7/04 - Clamping or clipping connections
• F16B 7/18 - Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements

Abstract

An actuator arrangement includes an actuator screwshaft (420) configured to receive a female connector (220), a lockpin (200) having a male connector (210) that is connected to the female connector (200). When the actuator screwshaft (420) is rotated, in use, the lockpin (200) is configured to move from a first position to a second position.

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft
• F16B 19/00 - Bolts without screw-threadPins, including deformable elementsRivets
• F16B 21/12 - Means without screw-thread for preventing relative axial movement of a pin, spigot, shaft, or the like and a member surrounding itStud-and-socket releasable fastenings without screw-thread by separate parts with locking-pins or split-pins thrust into holes
• F16H 25/20 - Screw mechanisms

Abstract

A rotary actuator assembly for moving a first relatively movable part relative to a second relatively movable part. The assembly includes a rotary actuator having a plurality of circumferential earth members for attachment to one of the first and the second relatively movable parts and a plurality of circumferential output members for attachment to the other of the first and second relatively movable parts. At least the plurality of circumferential earth members or the plurality of circumferential output members is provided with radially outwardly extending locking features around their circumference configured to be received in a mounting sleeve having complementary locking features to engage with the radially outwardly extending locking features.

IPC Classes  ?

• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• B64F 5/10 - Manufacturing or assembling aircraft, e.g. jigs therefor

Abstract

A rotary actuator assembly for moving a first relatively movable part (1) relative to a second relatively movable part (2), the assembly comprising a rotary actuator (100) having a plurality of circumferential earth members (1120) for attachment to one of the first and the second relatively movable parts and a plurality of circumferential output members (1140) for attachment to the other of the first and second relatively movable parts, and wherein at least the plurality of circumferential earth members or the plurality of circumferential output members is provided with radially outwardly extending locking features (1121, 1141) around their circumference configured to be received in a mounting sleeve having complementary locking features to engage with the radially outwardly extending locking features.

IPC Classes  ?

• B64C 3/38 - Adjustment of complete wings or parts thereof
• B64C 9/02 - Mounting or supporting thereof
• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing

Abstract

A system architecture for a backup thrust reverser actuation system control is provided. The system architecture includes an AC power supply (101, 201) of an aircraft, a power supply (102, 202) and a motor control (103, 203) adapted to control an electric motor (M) of a thrust reverser actuation system. The system architecture further includes a backup power supply (105, 212) adapted to provide power to the electric motor in the event that the power supply fails

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• F02K 1/76 - Control or regulation of thrust reversers

Abstract

A method of determining the status of a lock. The method includes reading data from a proximity switch and calculating an inductance value from a solenoid, the proximity switch and solenoid located in or around a lock, and processing the data from the proximity switch and the inductance value. The method further includes comparing the processed data with an expected value to confirm the lock status.

IPC Classes  ?

• G01D 5/20 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
• E05B 81/74 - Monitoring or sensing, e.g. by using switches or sensors the lock status, i.e. locked or unlocked condition by sensing the state of the actuator
• B64D 33/00 - Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for

Abstract

A system architecture for a backup thrust reverser actuation system control is provided. The system architecture includes an AC power supply of an aircraft, a power supply and a motor control adapted to control an electric motor (M) of a thrust reverser actuation system. The system architecture further includes a backup power supply adapted to provide power to the electric motor in the event that the power supply fails

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A rotary actuator mounting system configured to attach a rotary actuator to and between two relatively moveable parts, the rotary actuator being attached to a first of the two relatively moveable parts and to a second of the relatively moveable parts such that operation of the actuator causes one of the first and second relatively movable parts to rotate relative to the other of the first and second relatively movable parts about an axis of the rotary actuator. The system includes a compliant attachment component connecting the actuator to the first relatively moveable part, the compliant attachment component having a first end attached to the first movable part and a second end attached to the actuator, and wherein at least one of the first and the second end is in the form of a ball bearing arranged to be received in a complementary socket on the actuator and/or the first movable part.

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16H 19/08 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion

Abstract

A rotary actuator mounting system configured to attach a rotary actuator (10) to and between two relatively moveable parts (1, 2), the rotary actuator being attached to a first (1) of the two relatively moveable parts and to a second (2) of the relatively moveable parts such that operation of the actuator causes one of the first and second relatively movable parts to rotate relative to the other of the first and second relatively movable parts about an axis of the rotary actuator, the system further comprising a compliant attachment component (30) connecting the actuator to the first relatively moveable part, the compliant attachment component having a first end (301) attached to the first movable part (1) and a second end attached to the actuator (10), and wherein at least one of the first and the second end is in the form of a ball bearing arranged to be received in a complementary socket on the actuator and/or the first movable part.

IPC Classes  ?

• B64C 3/38 - Adjustment of complete wings or parts thereof
• B64C 9/02 - Mounting or supporting thereof

Abstract

A system architecture for operation of aircraft flaps. The system architecture includes a first pair of motor drive units, the first pair comprising a first motor drive unit (MD1) and a second motor drive unit (MD3), and a second pair of motor drive units, the second pair comprising a third motor drive unit (MD2) and a fourth motor drive unit (MD4). The system further includes a first plurality of switches connected between the first motor drive unit (MD1) and the second motor drive unit (MD3), the first plurality of switches configured to operate a first electric motor and a second electric motor, and a second plurality of switches connected between the third motor drive unit (MD2) and the fourth motor drive unit (MD4), the second plurality of switches configured to operate a third electric motor and a fourth electric motor.

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• B64C 9/06 - Adjustable control surfaces or members, e.g. rudders with two or more independent movements
• H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors

Abstract

A system architecture for operation of aircraft flaps is provided. The system architecture includes a first pair of motor drive units, the first pair comprising a first motor drive unit (MD1) and a second motor drive unit (MD3), and a second pair of motor drive units, the second pair comprising a third motor drive unit (MD2) and a fourth motor drive unit (MD4). The system further includes a first plurality of switches connected between the first motor drive unit (MD1) and the second motor drive unit (MD3), said first plurality of switches configured to operate a first electric motor (201) and a second electric motor (202), and a second plurality of switches connected between the third motor drive unit (MD2) and the fourth motor drive unit (MD4), said second plurality of switches configured to operate a third electric motor (203) and a fourth electric motor (204).

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy

Abstract

A method for monitoring the health of an electromechanical actuator “EMA” includes: generating a reference profile curve that is representative of a required demand of a measurable characteristic of the EMA; defining upper and lower tolerance limits of said reference profile curve; measuring said characteristic of said EMA and generating a measured curve profile based on said measurement; determining if the generated measured profile curve lies within the upper and lower tolerance limits of said reference profile curve; and if said generated measured profile curve does not lie within the upper and lower tolerance limits, providing an indication that said EMA is unhealthy.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

ABSTRACTELECTRIC ACTUATOR HEALTH MONITORINGA method (100) is described herein for monitoring the health of an electromechanical actuator "EMA" (10) comprising: generating a reference profile curve that is representative of a required demand of a measurable characteristic of the EMA. The method comprises the steps of defining (130) upper and lower tolerance limits of said reference profile curve, measuring (150) said characteristic of said EMA and generating a measured curve profile based on said measurement; determining (160) if the generated measured profile curve lies within the upper and lower tolerance limits of said reference profile curve, and if said generated measured profile curve does not lie within the upper and lower tolerance limits, providing an indication that said EMA is unhealthy.[Fig. 7]Date Recue/Date Received 2022-08-09

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• B64F 5/60 - Testing or inspecting aircraft components or systems
• G01P 3/44 - Devices characterised by the use of electric or magnetic means for measuring angular speed
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
• G01R 31/34 - Testing dynamo-electric machines

Abstract

The present invention provides a power inverter topology (400) for converting a DC input to one or more phases of AC output (412), and methods for operating the same. The power inverter comprises a switching circuit, an input circuit and a freewheeling diode bridge arrangement. The switching circuit comprises switch arms extending between the upper and lower branches of the switching circuit. The input circuit comprises upper and lower isolating switches (402) that can be selectively operated to respectively isolate the upper and/or lower branches of the switching circuit.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02P 27/00 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage

Abstract

A power inverter topology for converting a DC input to one or more phases of AC output, and methods for operating the same. The power inverter includes a switching circuit, an input circuit and a freewheeling diode bridge arrangement. The switching circuit comprises switch arms extending between the upper and lower branches of the switching circuit. The input circuit includes upper and lower isolating switches that can be selectively operated to respectively isolate the upper and/or lower branches of the switching circuit.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

A leadscrew assembly comprising: a screw shaft (1) along which is formed a first helical groove (10); a primary nut (2) along which is form a second helical groove (20); the first helical groove and the second helical groove cooperating to define a track (10,20); a secondary nut (5) along which is formed a third helical groove (30); the first helical groove and the third helical groove cooperating to define a track (10, 30) with a nominal running clearance; a preload X is provided wherein when a load applied to the screw exceeds the predetermined preload, the secondary nut engages with the track such that load of the screw above preload X is transferred through the secondary nut and thus protecting the primary nut.

IPC Classes  ?

• F16H 19/02 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion
• F16H 25/20 - Screw mechanisms
• F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts

Abstract

A leadscrew assembly includes a screw shaft along which is formed a first helical groove and a primary nut along which is form a second helical groove. The first helical groove and the second helical groove cooperate to define a track. The assembly also includes a secondary nut along which is formed a third helical groove. The first helical groove and the third helical groove cooperate to define a track with a nominal running clearance. A preload X is provided wherein when a load applied to the screw exceeds the predetermined preload, the secondary nut engages with the track such that load of the screw above preload X is transferred through the secondary nut and thus protecting the primary nut.

IPC Classes  ?

• F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
• F02K 1/76 - Control or regulation of thrust reversers

Abstract

A multi-slice hinge-line actuator includes a plurality of actuator slices mounted around a common axis of rotation and arranged to be rotated around the axis of rotation by a drive means in response to a control signal, the slices spaced axially along the axis of rotation. Each actuator slice has a first attachment means for attachment to a relatively fixed structure and a second attachment means for attachment to a moveable structure to be moved by the actuator in response to the control signal. The actuator also includes means for monitoring a strain pattern in the actuator at a plurality of locations along the axial direction of the actuator.

IPC Classes  ?

• G01M 13/00 - Testing of machine parts
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16H 21/40 - Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and oscillating motion
• G01L 1/20 - Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluidsMeasuring force or stress, in general by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
• G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis

Abstract

A system for detecting rotational over travel includes: an angular position sensor comprising a rotor rotatable about an axis, the angular position sensor configured to output one or more electrical signals to indicate an angular position of the rotor about the axis and/or a number of turns completed by the rotor about the axis; and a device comprising a first operating mode and a second operating mode and configured to transition from the first operating mode to the second operating mode in response to the rotor rotating beyond at least one angular position threshold, wherein the transition from the first operating mode to the second operating mode is independent of the one or more electrical signals.

IPC Classes  ?

• G01D 5/22 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
• G01D 5/347 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
• F16D 65/14 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position

Abstract

The present disclosure relates to a system (10; 50; 60) for detecting rotational over travel, the system (10; 50; 60) comprising: an angular position sensor (12; 52; 62) comprising a rotor (14; 54) rotatable about an axis (16; 48), the angular position sensor (12; 52; 62) configured to output one or more electrical signals to indicate an angular position of the rotor (14; 54) about the axis (16; 46) and/or a number of turns completed by the rotor (14; 54) about the axis (16; 46); and a device comprising a first operating mode and a second operating mode and configured to transition from the first operating mode to the second operating mode in response to the rotor (14; 54) rotating beyond at least one angular position threshold (22, 24; 42), wherein the transition from the first operating mode to the second operating mode is independent of the one or more electrical signals.

IPC Classes  ?

• B64C 13/24 - Transmitting means
• G01D 1/18 - Measuring arrangements giving results other than momentary value of variable, of general application with arrangements for signalling that a predetermined value of an unspecified parameter has been exceeded
• G01D 5/12 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means
• G01D 5/22 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils

Abstract

The disclosure provides a pole-piece structure for a magnetic gear, comprising a plurality of laminate plates, wherein each plate comprises one or more apertures and an aperture in each plate aligns with an aperture in an adjacent plate to form one or more channels extending from a first end of the laminate plates to a second, opposite end of the laminate plates, wherein a resin cast is provided within each channel to hold the plurality of laminate plates together.

IPC Classes  ?

• H02K 49/10 - Dynamo-electric clutchesDynamo-electric brakes of the permanent-magnet type
• H01F 7/02 - Permanent magnets
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H02K 51/00 - Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts

Abstract

A locking pin system comprising: an actuator having an actuator body defining an axial bore along its length; a locking pin axially moveably mounted within the bore, and drive means for driving the locking pin axially along the bore between a locking position extending from the actuator body and an unlocking position relatively retracted into the actuator body; wherein the drive means comprises engagement means for releasably engaging the locking pin, the engagement means being biased to an open position where they are not in engagement with the locking pin, and wherein the bore comprises a first section having a first diameter and a second section having a second, wider diameter.

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft

Abstract

A brake device for braking rotation of an input shaft includes a selectively operable trigger brake that includes: a static element; a trigger brake shaft mounted for rotational and axial movement relative to the static element and the input shaft; a preloaded torsion spring rotationally coupled to the input shaft but permitting a limited rotational movement between the trigger brake shaft and the input shaft; a roller jamming mechanism operable upon the relative rotation between the trigger brake shaft and the input shaft exceeding a predetermined amount to stop rotation of the input shaft upon operation of the trigger brake; and a brake actuator for selectively moving the trigger brake shaft into and out of engagement with a contact surface of the static element. Engagement of the contact surface of the static element and the trigger brake shaft overcomes the preload of the torsion spring.

IPC Classes  ?

• B60T 1/06 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission
• B64C 9/24 - Adjustable control surfaces or members, e.g. rudders forming slots at the front of the wing by single flap
• B64D 45/00 - Aircraft indicators or protectors not otherwise provided for
• F16D 3/10 - Couplings with means for varying the angular relationship of two coaxial shafts during motion
• F16D 3/72 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
• F16D 121/14 - Mechanical
• F16D 125/36 - Helical camsBall-rotating ramps

Abstract

A locking pin system comprising: an actuator (600) having an actuator body (601) defining an axial bore along its length; a locking pin (400) axially moveably mounted within the bore (606), and drive means (700, 900) for driving the locking pin axially along the bore between a locking position extending from the actuator body and an unlocking position relatively retracted into the actuator body; wherein the drive means comprises engagement means (800) for releasably engaging the locking pin, the engagement means being biased to an open position where they are not in engagement with the locking pin, and wherein the bore comprises a first section having a first diameter and a second section having a second, wider diameter, and wherein the bore and the engagement means are configured such that when the engagement means are located in the first section, the actuator body forces the engagement means to a closed position to engage with the locking pin and when the engagement means are in the second section, they return to the open position and out of engagement with the locking pin.

IPC Classes  ?

• A01B 73/02 - Folding frames
• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft
• E05D 11/10 - Devices for preventing movement between relatively-movable hinge parts
• F16B 19/00 - Bolts without screw-threadPins, including deformable elementsRivets
• F16H 25/20 - Screw mechanisms

Abstract

A multi-slice hinge-line actuator comprising: a plurality of actuator slices (20) mounted around a common axis of rotation (12) and arranged to be rotated around the axis of rotation by a drive means in response to a control signal, the slices spaced axially along the axis of rotation; each actuator slice having a first attachment means (24) for attachment to a relatively fixed structure and a second attachment means (26) for attachment to a moveable structure to be moved by the actuator in response to the control signal; and means for monitoring a strain pattern in the actuator at a plurality of locations along the axial direction of the actuator.

IPC Classes  ?

• B64C 13/38 - Transmitting means with power amplification
• B64F 5/60 - Testing or inspecting aircraft components or systems
• F16H 35/18 - Turning devices for rotatable members, e.g. shafts
• G01B 7/16 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
• G01M 13/00 - Testing of machine parts

Abstract

A brake device (40) for braking rotation of an input shaft (46) is provided. The brake device comprises:a selectively operable trigger brake (42) comprising:a static element;a trigger brake shaft (56) mounted for rotational and axial movement relative to the static element and the input shaft (46);a preloaded torsion spring (120) rotationally coupled to the input shaft (46) but permitting a limited rotational movement between the trigger brake shaft (56) and the input shaft (46);a roller jamming mechanism (42) operable upon the relative rotation between the trigger brake shaft (56) and the input shaft (46) exceeding a predetermined amount to stop rotation of the input shaft (46) upon operation of the trigger brake (42); anda brake actuator (62) for selectively moving the trigger brake shaft (56) into and out of engagement with a contact surface of the static element;wherein the engagement of the contact surface of the static element and the trigger brake shaft (56) overcomes the preload of the torsion spring (120) so as to produce a relative rotation between the trigger brake shaft (56) and the input shaft (46) to operate the roller jamming mechanism (44).

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F16D 41/064 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
• F16D 63/00 - Brakes not otherwise provided forBrakes combining more than one of the types of groups

Abstract

A braking unit includes a braking means and means, configured to receive power from a power line, for engaging and disengaging the braking means. A first power signal line is provided that is connected to the means for engaging and disengaging said braking means and a second power signal line is also provided that is connected to said means for engaging and disengaging said braking means. The first power signal line is connected to the means for engaging and disengaging the braking means via a first power switching device and the second power signal line is connected to the means for engaging and disengaging the braking means via a second power switching device.

IPC Classes  ?

• B64C 25/46 - Brake regulators for preventing skidding or aircraft somersaulting
• B60T 8/17 - Using electrical or electronic regulation means to control braking

Abstract

A system for controlling a hydraulic component. The system includes a control system configured to carry out a health check routine having steps of (A) fluidly connecting one of the hydraulic supply systems with the component until (i) a predetermined pressure is reached on the hydraulic supply side and/or the hydraulic return side, and/or (ii) a predetermined amount of time has passed; then (B) isolating the pressurised hydraulic fluid within the hydraulic supply side and the hydraulic return side so that hydraulic fluid leaks from the hydraulic supply side to the hydraulic return side via the controlled leakage; (C) monitoring the pressure of hydraulic fluid within the hydraulic supply side (50S) and/or the hydraulic return side over time; and then (D) determining if the pressure of hydraulic fluid within the hydraulic supply side and/or the hydraulic return side follows a predetermined or expected pattern.

IPC Classes  ?

• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• B64C 13/40 - Transmitting means with power amplification using fluid pressure
• F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
• G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors

IPC Classes  ?

• B64C 13/00 - Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
• F16D 71/00 - Mechanisms for bringing members to rest in a predetermined position
• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors

Abstract

There is provided a system (10) for controlling a hydraulic component (50). The system comprises a hydraulic component (50) comprising a hydraulic supply side (50S) and a hydraulic return side (50R), wherein the component further comprises a controlled leakage between the hydraulic supply side (50S) and the hydraulic return side (50R). The system further comprises a plurality of hydraulic supply systems (20, 30), each configured to selectively supply pressurised hydraulic fluid to the component (50), as well as a device (40) configured to monitor the pressure of hydraulic fluid within the hydraulic supply side (50S) and/or the hydraulic return side (50R). The system comprises a control system configured to carry out a health check routine on one or more of the hydraulic supply systems (20, 30), the routine comprising the steps of (A) fluidly connecting one of the hydraulic supply systems (20, 30) with the component (50) until (i) a predetermined pressure is reached on the hydraulic supply side (50S) and/or the hydraulic return side (50R), and/or (ii) a predetermined amount of time has passed; then (B) isolating the pressurised hydraulic fluid within the hydraulic supply side (50S) and the hydraulic return side (50R) so that hydraulic fluid leaks from the hydraulic supply side (50S) to the hydraulic return side (50R) via the controlled leakage; (C) monitoring the pressure of hydraulic fluid within the hydraulic supply side (50S) and/or the hydraulic return side (50R) over time; and then (D) determining if the pressure of hydraulic fluid within the hydraulic supply side (50S) and/or the hydraulic return side (50R) follows a predetermined or expected pattern.

IPC Classes  ?

• B64C 13/42 - Transmitting means with power amplification using fluid pressure having duplication or stand-by provisions
• B64F 5/60 - Testing or inspecting aircraft components or systems
• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere

Abstract

A ball screw assembly includes a screw shaft along which is formed a first helical groove; a nut along which is form a second helical groove; the first helical groove and the second helical groove cooperating to define a track, a plurality of balls arranged in the track and configured to move along the track in response to relative motion between the screw shaft and the nut such that rotational motion of the screw is translated to linear motion of the nut via the balls and vice versa. The assembly also includes a bypass shoe arranged between the nut and the track and spaced from the track by a predetermined preload X, wherein when a load applied to the nut exceeds the predetermined preload, the bypass shoe engages with the track such that motion of the screw is transferred to motion of the nut via the shoe and bypasses the balls.

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
• F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts

Abstract

A ball screw assembly comprising: a screw shaft (1) along which is formed a first helical groove (3); a nut (2) along which is form a second helical groove (3'); the first helical groove and the second helical groove cooperating to define a track (3, 3'); a plurality of balls (4) arranged in the track and configured to move along the track in response to relative motion between the screw shaft and the nut such that rotational motion of the screw is translated to linear motion of the nut via the balls and vice versa; and further comprising: a bypass shoe (7) arranged between the nut and the track and spaced from the track by a predetermined preload X, wherein when a load applied to the nut exceeds the predetermined preload, the bypass shoe engages with the track such that motion of the screw is transferred to motion of the nut via the shoe and bypasses the balls.

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• F02K 1/76 - Control or regulation of thrust reversers
• F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members

Abstract

An actuator system for actuating movement of a control surface of an aircraft wing includes a common input rail connectable to a means for providing movement to said input rail. The system also includes: a plurality of rotary geared actuators “RGAs”; a common output rail connectable to said control surface; wherein each of said plurality of RGAs is connected to said input rail by an individual input clutch and also connected to said output rail by an individual output clutch, and wherein the input clutch functions independently of the output clutch.

IPC Classes  ?

• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical

Abstract

A rotary geared actuator (RGA) for actuating movement of a first movable surface and a second movable surface. The RGA include an input shaft configured to receive torque in use, and an output shaft comprising means configured to communicate with and move both said first surface and said second surface in use. The actuator may be used in a leading edge high lift architecture for an aircraft wing, or may be used in other applications.

IPC Classes  ?

• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing

Abstract

A rotary geared actuator (RGA) (211b) is described herein for actuating movement of a first movable surface (210A) and a second movable surface (210B); the RGA (211b) comprising: an input shaft (231) configured to receive torque in use, and an output shaft (232) comprising means configured to communicate with and move both said first surface (210A) and said second surface (210B) in use. The actuator may be used in a leading edge high lift architecture for an aircraft wing, or may be used in other applications.

IPC Classes  ?

• B64C 3/50 - Varying camber by leading or trailing edge flaps
• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts

Abstract

An actuator system (100) is described herein for actuating movement of a control surface (3) of an aircraft wing (1), said system (100) comprising: a common input rail (160) connectable to a means for providing movement to said input rail (160); a plurality of rotary geared actuators "RGAs" (110); a common output rail (130) connectable to said control surface (3); wherein each of said plurality of RGAs (110) is connected to said input rail (160) by an individual input clutch (170) and also connected to said output rail (130) by an individual output clutch (171), and wherein the input clutch (170) functions independently of the output clutch (171). A method for manufacturing such an actuator system (100) is also disclosed.

IPC Classes  ?

• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical

Abstract

A biasing system for an actuator. The system includes a lock sleeve, a lock shaft, a tine having a tine finger extending along a longitudinal axis, a biasing member and a biasing spring. The biasing member and biasing spring are configured to maintain a position of the tine finger away from the longitudinal axis in the direction of the lock sleeve when the lock shaft and the lock sleeve are deployed, in use, such that, when the lock sleeve is returned, the tine finger is biased against the lock sleeve to prevent the lock sleeve from returning to a locked position before the lock shaft is able to return to a locked position.

IPC Classes  ?

• F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant

Abstract

A thrust bearing seal for radially sealing a gap between a first component and a second component. The seal includes an external sealing cap that extends circumferentially around an outer circumferential surface of at least a section of said first component and a projection that extends radially inwardly from said external sealing cap and into said gap.

IPC Classes  ?

• F16C 33/74 - Sealings of sliding-contact bearings
• F16C 17/04 - Sliding-contact bearings for exclusively rotary movement for axial load only
• F16J 15/3216 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction parallel to the surfaces
• F16J 15/3236 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings

Abstract

A biasing system for an actuator is provided. The system comprises a lock sleeve (120), a lock shaft (130), a tine (100) having a tine finger (101) extending along a longitudinal axis, a biasing member (142) and a biasing spring (140). The biasing member (142) and biasing spring (140) are configured to maintain a position of the tine finger (101) away from the longitudinal axis in the direction of the lock sleeve when the lock shaft (120) and the lock sleeve (130) are deployed, in use, such that, when the lock sleeve (120) is returned, the tine finger (101) is biased against the lock sleeve (120) to prevent the lock sleeve (120) from returning to a locked position before the lock shaft (130).

IPC Classes  ?

• B64D 33/04 - Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
• F02K 1/54 - Nozzles having means for reversing jet thrust
• F02K 1/76 - Control or regulation of thrust reversers
• F16B 7/10 - Telescoping systems

Abstract

A thrust bearing seal (100, 100a) for radially sealing a gap between a first component (110) and a second component (120) is described herein. The seal (100, 100a) comprises an external sealing cap (170, 170) that extends circumferentially around an outer circumferential surface of at least a section of said first component (110) and wherein said sealing component further comprises a projection (180, 180) that extends radially inwardly from said external sealing cap (170, 170a) and into said gap.

IPC Classes  ?

• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• F16C 33/74 - Sealings of sliding-contact bearings
• F16J 15/3284 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structureSelection of materials

Abstract

A door arrangement, for use on an aircraft, includes a door and an actuation arrangement. The arrangement is configured to move the door between an open position and a closed position. The actuation arrangement includes: a first member coupled to the door such that movement of the first member moves the door; a second member pivotally coupled to the first member and arranged to drive movement of the first member, wherein the second member is movable between a first position which corresponds to the door being in an open position and a second position which corresponds to the door being in a closed position; and an actuator arranged to rotate the second member between the first position and second positions. The door arrangement further comprises a fixed stop.

IPC Classes  ?

• B64C 1/00 - FuselagesConstructional features common to fuselages, wings, stabilising surfaces or the like
• B64C 1/14 - WindowsDoorsHatch covers or access panelsSurrounding frame structuresCanopiesWindscreens

Abstract

A rotary geared actuator RGA includes an actuator body that has a gear or gears and means configured to rotate said gear or gears about a first central longitudinal axis X′. The RGA also includes a drive transmission shaft extending along a second central longitudinal axis X″, means for rotating said drive transmission shaft about said central longitudinal axis X″, and means for translating said rotation of said drive transmission shaft to said gears so as to cause rotation of said gears about said first central longitudinal axis X′. The second central longitudinal axis X″ of said drive transmission shaft is laterally offset from said first central longitudinal axis X′.

IPC Classes  ?

• F16H 1/46 - Systems consisting of a plurality of gear trains, each with orbital gears
• F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear

Abstract

A door arrangement (2), for use on an aircraft, comprising a door (4A) and an actuation arrangement (6), configured to move the door (4A) between an open position and a closed position. The actuation arrangement (6) comprises a first member (8) coupled to the door (4A) such that movement of the first member (8) moves the door (4A); a second member (14) pivotally coupled to the first member (8) and arranged to drive movement of the first member (8), wherein the second member (14) is movable (14) between a first position which corresponds to the door (4A) being in an open position and a second position which corresponds to the door (4A) being in a closed position; and an actuator (18) arranged to rotate the second (14) member between the first position and second positions. The door arrangement (2) further comprises a fixed stop (26) arranged such that when the second member (14) is in the second position, an external force (50) acting on the door (4A) acting to move the door towards its open position causes at least one of the first member (8) or second member (14) to contact the fixed stop (26) and thereby prevent movement of the door (4A) towards the open position.

IPC Classes  ?

• B64C 1/14 - WindowsDoorsHatch covers or access panelsSurrounding frame structuresCanopiesWindscreens
• E05F 15/00 - Power-operated mechanisms for wings
• E06B 5/00 - Doors, windows, or like closures for special purposesBorder constructions therefor

Abstract

A rotary geared actuator RGA (100) is described herein comprising: an actuator body comprising: a gear or gears (140, 150, 160a, 160b) and means configured to rotate said gear or gears about a first central longitudinal axis X'; and a drive transmission shaft (210) extending along a second central longitudinal axis X", and means for rotating said drive transmission shaft (210) about said central longitudinal axis X", and means for translating said rotation of said drive transmission shaft (210) to said gears (140, 150, 160a, 160b) so as to cause rotation of said gears (140; 150; 160a, 160b) about said first central longitudinal axis X', and wherein said second central longitudinal axis X" of said drive transmission shaft (210) is laterally offset from said first central longitudinal axis X'. A method for manufacturing such a RGA is also described.

IPC Classes  ?

• B64C 3/50 - Varying camber by leading or trailing edge flaps
• B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
• F16H 1/20 - Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members

Abstract

An assembly for moving a tip of an airfoil (e.g., an aircraft wing tip) relative to a fixed body of the airfoil. The assembly includes a linear actuator configured to pivotally attach to both the fixed body of the airfoil and the movable tip of the airfoil, such that the linear actuator is configured to extend between a first pivotal attachment on the fixed body and a second pivotal attachment on the movable tip. The linear actuator is configured to repeatedly move the tip of the airfoil from an unfolded position to a folded position, wherein throughout such movement the linear actuator is configured to pivot about both the first and second pivotal attachments.

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft

Abstract

A system for stopping rotation of a first gear and a second gear on a shaft, The first gear and second gear are concentric and rotatable about said shaft. The first gear and the second gear are driven by the same input system and the first gear and the second gear are configured to rotate at differential speeds and independently to each other. The first gear comprises a first end stop and the second gear comprises a second end stop and the first end stop and the second end stop are configured to engage each other when the first gear and the second gear have each rotated a predetermined number of turns. Engagement of the first end stop with the second end stop is configured to prevent rotation of the first gear and the second gear and cause a stall in the system.

IPC Classes  ?

• F16H 35/00 - Gearings or mechanisms with other special functional features

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft

IPC Classes  ?

• F16D 71/00 - Mechanisms for bringing members to rest in a predetermined position
• F16H 1/00 - Toothed gearings for conveying rotary motion
• F16H 35/00 - Gearings or mechanisms with other special functional features

Abstract

A linear actuator includes a screw shaft comprising a screw thread and having a longitudinal axis A, a nut movable along the screw shaft from a retracted position to an extended position, and a plurality of rollers movable with the nut. Each roller includes a cylindrical surface configured to roll along one or more flanks of the screw thread, such that rotation of the screw shaft causes the rollers to roll along the flank(s) so that the nut translates in an axial direction along the screw shaft. The screw thread has a variable lead angle. The actuator can be part of a power door opening system of an aircraft.

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
• F16H 25/20 - Screw mechanisms
• B64C 9/36 - Adjustable control surfaces or members, e.g. rudders collapsing or retracting against or within other surfaces or other members the members being fuselages or nacelles

Abstract

An apparatus for a thrust reverser actuation system (“TRAS”), the apparatus comprising: an input shaft; a first component located concentrically around the input shaft; a second component located concentrically around the first component; a first ballscrew mechanism between the input shaft and the first component, and configured such that rotational movement of the input shaft causes a translational movement of the first component via the first ballscrew mechanism; and a second ballscrew mechanism between the first component and the second component, and configured such that rotational movement of the first component causes a translational movement of the second component via the second ballscrew mechanism.

IPC Classes  ?

• F16H 25/20 - Screw mechanisms
• F02K 1/76 - Control or regulation of thrust reversers
• F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members
• F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
• F02K 1/15 - Control or regulation

Abstract

A thrust reverser is described that comprises a new type of locking means for locking an actuator in position so that maintenance can be performed on the machine. The locking means comprises a removable locking device for preventing movement of an actuator. The locking means may also function in one configuration as an end cap. An actuator is also described comprising a removable torque limiting device for limiting torque of the actuator.

IPC Classes  ?

• F02K 1/76 - Control or regulation of thrust reversers

Abstract

An anti-rotational locking apparatus for locking an elongate rotatable element in a particular rotational position with respect to a housing include: a sleeve having an internal profile for slidably receiving therethrough a rotatable elongate element having a portion with an external profile configured to positively engage with the internal profile of the sleeve; a housing; and a locking pin. The sleeve has a flange with a first opening therein and the housing has a second opening therein, the locking pin being insertable in the openings. The flange is arranged for slidable alignment with the second opening in the housing such that when the openings are aligned, the locking pin may be inserted in the openings to lock the flange to the housing and thereby prevent rotation of the flange and of an elongate element extending therethrough and engaged therewith with respect to the housing.

IPC Classes  ?

• F16C 1/26 - Construction of guiding-sheathings or guiding-tubes
• F16G 11/02 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cablesFastening means which engage a sleeve or the like fixed on the cable
• F16G 11/12 - Connections or attachments, e.g. turnbuckles, adapted for straining of cables, ropes or wire
• F16C 11/10 - Arrangements for locking

Abstract

An apparatus configured to measure the output of a rotary actuator unit includes a rotary actuator unit. The unit includes a stationary portion, a rotating portion, and a main rotational axis (L) that runs in an axial direction from a first end of the rotary actuator unit to a second end of the rotary actuator unit. The first end is opposite the second end. The apparatus also includes a linear position sensor comprising a follower, a sensor, and a sensor arm, wherein the follower is attached to the sensor by sensor arm; and wherein the sensor is attached to the stationary portion. The apparatus also includes a follower track attached or formed in, or on, to the rotating portion. The follower track is aligned in the circumferential direction that is perpendicular to axial direction of the main rotational axis (L). The follower is configured to follow the follower track.

IPC Classes  ?

• G01D 5/00 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable

Abstract

A system for detecting a fault in a locking pin for use in an aircraft includes the locking pin; means for receiving a static air temperature; and a controller; wherein said locking pin comprises an internal heater element and at least one internal temperature sensor provided therein. The system also includes means for transmitting said measured temperature sensor information from said at least internal temperature sensor and said static air temperature information to said controller. The controller is configured to compare the static air temperature information with said locking pin temperature sensor information and determine if a difference between the measurements is above a static v. internal temperature threshold value.

IPC Classes  ?

• G01K 15/00 - Testing or calibrating of thermometers
• H05B 1/02 - Automatic switching arrangements specially adapted to heating apparatus

Abstract

A manual brake override system includes a gear system, an electric motor in operative communication with the input of the gear system, a holding brake in operative communication with the input of the gear system. The holding brake is configured to prevent movement within the gear system when engaged. A manual handwind is provided in operative communication with the input of the gear system and the manual handwind and holding brake are configured such that the input of the gear system can be driven, with the manual handwind, whilst the holding brake is engaged.

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft
• B64C 13/50 - Transmitting means with power amplification using electrical energy
• B64C 13/04 - Initiating means actuated personally
• B64C 23/06 - Influencing air flow over aircraft surfaces, not otherwise provided for by generating vortices

Abstract

A spring assembly comprises an edge wound wave spring and a shim. The spring comprises a plurality of axially spaced, axially compressible wave-like turns extending between a first end portion and a second end portion. The first end portion comprises a plurality of closely arranged parallel turns. The shim comprises a shim body and at least one mounting lug projecting radially from the shim body. The mounting lug is received between adjacent turns of the first end portion of the edge wound wave spring for retaining the shim to the edge wound wave spring.

IPC Classes  ?

• F16F 1/32 - Cup springsDished disc springs
• F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
• F16F 1/06 - Wound springs with turns lying in cylindrical surfaces

Abstract

A manual brake override system, comprising a gear system (6), an electric motor (1) in operative communication with the input (5) of the gear system (6), a holding brake (3) in operative communication with the input (5) of the gear system (6). The holding brake (3) is configured to prevent movement within the gear system (6) when engaged. A manual handwind (4) is provided in operative communication with the input (5) of the gear system (6) and the manual handwind (4) and holding brake (3) are configured such that the input (5) of the gear system (6) can be driven, with the manual handwind (4), whilst the holding brake (3) is engaged.

IPC Classes  ?

• B64C 3/56 - Folding or collapsing to reduce overall dimensions of aircraft
• F16D 59/00 - Self-acting brakes, e.g. coming into operation at a predetermined speed
• F16H 35/18 - Turning devices for rotatable members, e.g. shafts

Abstract

A system for detecting a fault in a locking pin for use in an aircraft is described herein, said system comprising: said locking pin (120); means (160) for receiving a static air temperature; and a controller (150); wherein said locking pin (120) comprises an internal heater element (130) and at least one internal temperature sensor (140) provided therein, said system further comprising means for transmitting said measured temperature sensor information from said at least internal temperature sensor (140) and said static air temperature information to said controller (150), and wherein said controller (150) is configured to compare the static air temperature information with said locking pin temperature sensor information and determine if a difference between the measurements is above a static v. internal temperature threshold value. A system is also described herein for detecting a fault in a locking pin for use in an aircraft, said system comprising: said locking pin (120), wherein said locking pin (120) comprises an internal heater element (130) and at least two internal temperature sensors (140) provided therein, and a controller (150); wherein said controller (150) is configured to compare temperature information from a first of said at least two temperature sensors (140) with a temperature information from a second of said at least two temperature sensors (140), and wherein if said difference between said first and second sensors (140) is above an internal sensor comparison threshold, said controller (150) is configured to determine that at least one of said first and second temperature sensors (140) is faulty. Methods are also described herein.

IPC Classes  ?

• B64D 15/12 - De-icing or preventing icing on exterior surfaces of aircraft by electric heating
• B64D 15/20 - Means for detecting icing or initiating de-icing

Abstract

An actuator system for controlling movement of a plurality of panels. The system includes two lifting mechanisms connected to each panel at two separate locations on the panel, and, for each panel: an actuator in engagement with a first of the lifting mechanisms to drive the lifting mechanism to move the panel, and a torque tube having a first end in engagement with the actuator so as to be rotated by the actuator as the actuator drives the lifting mechanism, the torque tube having a second end in engagement with the other of the two lifting mechanisms to drive the lifting mechanism due to rotation of the torque tube.

IPC Classes  ?

• B64C 9/22 - Adjustable control surfaces or members, e.g. rudders forming slots at the front of the wing
• B64C 13/00 - Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
• B64C 3/28 - Leading or trailing edges attached to primary structures, e.g. forming fixed slots
• B64C 3/38 - Adjustment of complete wings or parts thereof
• B64C 9/16 - Adjustable control surfaces or members, e.g. rudders forming slots at the rear of the wing

Abstract

A rotary seal comprises includes a first annular element, a second annular element and a seal element. The first annular element has a first axially extending flange and a first radially extending flange extending radially from a proximal end of the first axially extending flange. The second annular element has a second axially extending flange and a second radially extending flange extending radially from a proximal end of the second axially extending flange in the same direction as the first radially extending flange. The second annular element is fixed to the first annular element, the second axially-extending flange being received radially on the first axially-extending flange. The second radially extending flange is spaced axially from the first radially extending flange to define a pocket therebetween.

IPC Classes  ?

• F16J 15/3284 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structureSelection of materials

Abstract

A locking system includes a locking element which is movable between a first, locking position and a second unlocking position and an unlocking actuator for moving the locking element (from the first position to the second position over an unlocking stroke length (Su). The system further comprises a control unit configured to command the unlocking actuator to move the locking element from the first position to a third position over an anti-icing stroke length (Sa) which is shorter than the unlocking stroke length (Su).

IPC Classes  ?

• B64D 15/16 - De-icing or preventing icing on exterior surfaces of aircraft by mechanical means, e.g. pulsating mats or shoes attached to, or built into, surface
• B64D 15/20 - Means for detecting icing or initiating de-icing
• F15B 15/26 - Locking mechanisms

Abstract

A thrust reverser actuation system for a jet propulsion engine for a vehicle, the thrust reverser actuation system comprising: a plurality of hydraulically-driven thrust reverser actuators for actuating one or more thrust reverser components of the jet propulsion engine, each actuator comprising: a hydraulic circuit; and a bi-directional electrically-driven pump configured to pump hydraulic fluid through the hydraulic circuit, wherein the hydraulic circuit and the pump are configured such that the direction of the pump dictates the direction of the actuation of the actuator.

IPC Classes  ?

• F02K 1/76 - Control or regulation of thrust reversers
• F15B 11/22 - Synchronisation of the movement of two or more servomotors
• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• F15B 15/18 - Combined units comprising both motor and pump

Abstract

A ballscrew assembly includes a nut having a first helical groove formed on a radially inner surface and defining an axis, a screw disposed along the axis (X) and within the nut and that includes a second helical groove formed on a radially outer surface and opposed to the first helical groove so as to form a helical raceway. The assembly also includes a plurality of balls disposed in the helical raceway and an annular seal disposed radially between the nut and the screw. The seal includes a resilient body and a layer formed of PTFE and disposed radially between the resilient body and the screw and configured to contact the radially outer surface of the screw. An optional annular scraper is disposed axially adjacent to the seal and is configured to receive fluid at one axial end and expel fluid at a second axial end.

IPC Classes  ?

• F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
• F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members
• F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip

Abstract

An actuation system comprises a plurality of actuators, a common power drive unit for driving the actuators and a transmission line transmitting drive from the common drive unit to the plurality of actuators. A clutch is arranged in the transmission line between the power drive unit and the plurality of actuators for selectively disconnecting the power drive unit from the plurality of actuators. At least one sensor is provided for sensing an abnormal load condition in the actuation system. The at least one sensor is operatively coupled to a clutch control which is configured such that when the at least one sensor senses an abnormal load condition, the clutch control is operative to disengage the clutch so as to disconnect the power drive unit from the plurality of actuators. A brake is operative to brake the actuators upon disengagement of the clutch.

IPC Classes  ?

• B64C 13/50 - Transmitting means with power amplification using electrical energy
• B64C 9/26 - Adjustable control surfaces or members, e.g. rudders forming slots at the front of the wing by multiple flaps
• F16H 61/12 - Detecting malfunction or potential malfunction, e.g. fail safe

Abstract

An actuation system (2) comprises a plurality of actuators (10), a common power drive unit (12) for driving the actuators (10) and a transmission line (14) transmitting drive from the common drive unit (14) to the plurality of actuators (10). A clutch (24) is arranged in the transmission line (14) between the power drive unit (12) and the plurality of actuators (10) for selectively disconnecting the power drive unit (12) from the plurality of actuators (4). At least one sensor (26) is provided for sensing an abnormal load condition in the actuation system (2). The at least one sensor (26) is operatively coupled to a clutch control (28) which is configured such that when the at least one sensor (26) senses an abnormal load condition, the clutch control (28) is operative to disengage the clutch (24) so as to disconnect the power drive unit (12) from the plurality of actuators (10). A brake (20) is operative to brake the actuators (10) upon disengagement of the clutch (24).

IPC Classes  ?

• B64C 3/50 - Varying camber by leading or trailing edge flaps
• B64C 13/28 - Transmitting means without power amplification or where power amplification is irrelevant mechanical
• B64C 13/38 - Transmitting means with power amplification
• F16D 9/00 - Couplings with safety member for disconnecting
• F16D 48/00 - External control of clutches
• F16D 67/02 - Clutch-brake combinations