Abstract:
There is described a landing gear having a bogie including a elongated beam (2) for accommodating at least two axles receiving each a pair of ground engaging wheels, at least one axle (5) being pivotally mounted on the elongated beam. The landing gear further includes axle travel limitation means (10) extending between said pivotable axle and said elongated beam to be hitched up thereto, said travel limitation means being deformable one way starting from an stable and lockable state thereof corresponding to a landing position of said pivotable axle. There are also described independently lockable and actuatable telescopic struts.
Abstract:
A device may be used to limit flexion of the spine without substantially limiting extension of the spine. Various accessories, instruments, and methods may be used to help deploy the flexion limiting device, manipulate, and adjust it.
Abstract:
A device may be used to limit flexion of the spine without substantially limiting extension of the spine. Various accessories, instruments, and methods may be used to help deploy the flexion limiting device, manipulate, and adjust it.
Abstract:
A landing gear (70) for an aircraft, the landing gear including an axle (14) pivotally connected to a bogie beam (12) and a locking device (11c), the locking device being arranged to couple the axle to the bogie beam, the locking device including a movable member and a follower (22), the movable member (60) being arranged to be moved by an actuator between first and second configurations, the locking device being arranged such that movement of the movable member towards the second configuration causes corresponding movement of the follower so as to transfer a steering force to the axle through the follower which causes the axle to rotate in a first direction, wherein, with the movable member in the first configuration, the locking device is arranged with the follower in a first configuration that inhibits the movable member being moved by an external force applied to the axle and, with the movable member in the second configuration, the locking device is arranged with the follower in a second configuration that permits the movable member to be moved by an external force applied to the axle.
Abstract:
A main landing gear assembly for an aircraft comprising: an elongate beam pivotally coupled about its longitudinal axis to the aircraft such that the axis of rotation of the elongate beam is generally parallel to the longitudinal axis of the aircraft fuselage; a shock strut pivotally coupled at a first end to the elongate beam and coupled at a second end to a wheel assembly; a folding forward stay pivotally coupled at a first end to the elongate beam and pivotally coupled at a second end to the shock strut; and a rigid rear stay pivotally coupled at a first end to the aircraft and pivotally coupled at a second end to the shock strut, the rigid rear stay being arranged to restrain the path of the shock strut when moving between a deployed and a retracted position such that the wheel assembly is located forward and inboard in the retracted position in comparison with its location in the deployed position.
Abstract:
A landing gear for an aircraft comprises: a shock absorber strut (1) with upper and lower telescoping portions (2, 3), the upper portion (2) being connectable to the airframe of the aircraft; an arm (4) to extend fore and aft relative to the aircraft and carrying a landing wheel, (7, 7 1 ), and pivotally connected by a main pivot (5) to the lower portion (3) of the shock absorber strut; and a load reacting unit (9) connected between the arm (4) and the shock absorber strut (1) for reacting to load applied between the arm and shock absorber strut on landing, and an indicator (60) for monitoring the load applied to the load reacting unit (9) on landing. The load reacting unit (9) may be connected between a forward end of the arm (4) and the upper portion (2) of the shock absorber strut to make the gear act as a semi-levered landing gear. Alternatively, the load reacting unit (9) may be connected between the arm (4) and the lower portion (3) of the shock absorber strut to act as a pitch trimmer. The arm (4) may comprise a bogie beam with fore and aft landing wheels (7, 7 1 ) with the main pivot (5) therebetween. The load reacting unit (9) preferably comprises a fluid pressure unit and the indicator (60) comprises a mechanical indicator that operates at a predetermined pressure threshold.
Abstract:
A spinal implant for limiting flexion of the spine includes a tether structure for encircling adjacent spinal processes. Usually, a pair of compliance members will be provided as part of the tether structure for elastically limiting flexion while permitting an extension. A cross-member is provided between the compliance member or other portions of the tether structure to stabilize the tether structure and prevent misalignment after implantation.
Abstract:
A spinal implant for limiting flexion of the spine includes a tether structure for encircling adjacent spinal processes. Usually, a pair of compliance members will be provided as part of the tether structure for elastically limiting flexion while permitting an extension. A cross-member is provided between the compliance member or other portions of the tether structure to stabilize the tether structure and prevent misalignment after implantation.
Abstract:
A pin joint assembly for an aircraft landing gear comprising: an elongate joint pin (206); at least one first lug (202a, 202) through which the joint pin passes; and at least one second lug (204) through which the joint pin passes; wherein the joint pin includes first (212) and second (212a) retaining elements located at opposite ends of the joint pin and arranged to maintain the location of the joint pin relative to the first and second lugs, and wherein the pin joint assembly further comprises a respective resilient member (214, 214a) located between each of the retaining elements and a respective one of the first and second lugs, each resilient element being elastically deformable.
Abstract:
An aircraft landing gear including a shock absorber and a fluid replenishment device, the shock absorber having a compression chamber containing hydraulic fluid and the fluid replenishment device including a recuperator chamber for providing hydraulic fluid to the compression chamber of the shock absorber, the recuperator chamber including: a closed container defining an internal space and having: a first port coupled in a fluid tight manner to the compression chamber of the shock absorber; a second port arranged to be coupled in a fluid tight manner to a pressurised source of auxiliary hydraulic fluid; and a third port arranged to be coupled in a fluid tight manner to a second source of pressurised fluid; a movable element movably mounted within the container and arranged to divide the internal space into first and second subspaces, the first and second ports being in fluid communication with the first subspace and the third port being in fluid communication with the second subspace; and a valve having a open configuration in which the auxiliary hydraulic fluid may pass into the first subspace and a closed configuration wherein the second port is sealed in a fluid tight manner, wherein the fluid replenishment device is arranged such that, when the pressure of fluid within the second subspace is greater than the pressure of fluid within the first subspace, the movable element moves towards the valve such that it can mechanically couple with the valve so as to open the valve.