A piston housing unit comprises a housing with a longitudinal axis, a piston rod that is displaceable, in particular along the and/or around the longitudinal axis, a guide/damping unit for guiding and damping the displacement of the piston rod.

A shock strut includes a first piston having a first hollow interior and a second piston having a second hollow interior. The first piston is movably mounted to the second piston. The shock strut additionally includes a housing having a third hollow interior, and the second piston is movably mounted to the housing. In response to application of a force to the shock strut, the first piston is receivable within the second piston during a first stage of compression and together, the first piston and the second piston are receivable within the housing during a second stage of compression.

A bearing spring/damper system of a vehicle wheel has a hydraulic vibration damper consisting of a damper cylinder and a damper piston guided therein, the piston rod of which hydraulic vibration damper is fastened to the vehicle body, whilst the damper cylinder is supported to a wheel guiding element. A pretension spring is clamped functionally between the damper piston and a pretension piston which can be displaced hydraulically in the longitudinal direction of the piston rod. The pretension piston is supported hydraulically with respect to the damper cylinder by a support chamber filled with the hydraulic medium of the vibration damper, and can be displaced by a conveying device, which conveys hydraulic medium into or out of the support chamber. The pretension spring is parallel-connected in every possible position of the pretension piston of a bearing spring ultimately clamped between the vehicle body and the wheel for force transmission.

A method and apparatus for a shock absorber for a vehicle having a gas spring with first and second gas chambers, wherein the first chamber is utilized during a first travel portion of the shock absorber and the first and second chambers are both utilized during a second portion of travel. In one embodiment, a travel adjustment assembly is configured to selectively communicate a first gas chamber with a negative gas chamber.

A suspension element includes a main body having an end cap defining an internal volume and a tubular element slidably engaged with the main body. The suspension element further includes a first piston and a flow control element. The flow control element is configured to prevent movement of the tubular element relative the main body in a direction. The suspension element may further include a locking member and a piston. The locking member may be configured to engage a barrier of the main body when the first piston traverses at least a predetermined distance towards the end cap. The locking member may be affixed to the tubular element and may fully surround the tubular element. Together the flow control element and the locking member are configured to prevent movement of the suspension element.

An aircraft landing gear shock absorbing strut having an outer cylinder and a sliding tube coupled within the cylinder bore to move between compressed and extended conditions. The cylinder and tube define a variable-volume internal chamber. The internal chamber is divided into a first spring chamber and a second spring chamber. The first spring chamber is a pneumatic chamber containing a first gas that is compressed when the strut moves from the extended condition to the compressed condition to provide compression damping. The second spring chamber contains a second gas and a hydraulic liquid, and is configured to compress the second gas when the strut moves from the extended condition to the compressed condition. The second spring chamber contains one or more damping orifices through which the oil passes as the strut extends to provide recoil damping during extension of the strut.

A damper for a train coupler is shown, comprising a hydraulic balancing chamber (115) defined in an annular space between a piston (101) and a housing (102) in which the piston is movably received, wherein the balancing chamber is in flow communication with a hydraulic high-pressure chamber (103) via inlet and outlet bores (116; 130) formed through a slip-ring (117) that journals the piston in the housing. A portion (129) of the piston is shielded in a buffer chamber (128) formed in the annular space between the piston and the housing, in axial alignment with the balancing chamber.

A suspension element includes a main body having an end cap defining an internal volume and a tubular element slidably engaged with the main body. The suspension element further includes a first piston and a flow control element. The flow control element is configured to prevent movement of the tubular element relative the main body in a direction. The suspension element may further include a locking member and a piston. The locking member may be configured to engage a barrier of the main body when the first piston traverses at least a predetermined distance towards the end cap. The locking member may be affixed to the tubular element and may fully surround the tubular element. Together the flow control element and the locking member are configured to prevent movement of the suspension element.

A shock absorber includes a compensator and a variable volume chamber. The compensator contains a compressible fluid and the variable volume chamber contains a substantially incompressible fluid. During a compression stroke, an increase in the volume of the incompressible fluid in the variable volume chamber compresses the compensator and thereby increases the available volume in the variable volume chamber.

A dual-axle vehicle corner assembly which may include a sub-frame, a first arm connected to the sub-frame and rotatable with respect to the sub-frame about a first arm axis, the first arm having a first axle axis about which a first wheel rotates when connected to the first arm, a second arm connected to the sub-frame and rotatable with respect to the sub-frame about a second arm axis, the second arm having a second axle axis about which a second wheel rotates when connected to the second arm, and a suspension system comprising a piston assembly interconnecting the first arm and the second arm, the piston assembly is to controllably increase and decrease a length of the piston assembly to control a distance between the first axle axis and the second axle axis.