An air spring includes a first body; a first piston sealed against a first wall of the first body; a cup having a second wall; and a second piston, wherein the cup and the second piston are configured such that: in an extended position, the second piston does not seal against the second wall, in an intermediate position, the second piston seals against the second wall, and as the first piston moves from the intermediate position to a compressed position, a spring rate of the air spring will increase at a higher rate than if the second piston were not sealed against the second wall.

A damper assembly includes a housing having a tubular shape defining a main chamber extending along a center axis. A piston is movable along the center axis and divides the main chamber into a compression chamber and a rebound chamber. The piston includes a piston body defining a frequency-adaptive orifice (FAO) passage providing fluid communication between the compression chamber and the rebound chamber. The piston includes an FAO valve assembly having an FAO cover member configured to block fluid flow therethrough in response to application of a low-frequency excitation, and allowing fluid flow through the FAO passage in response to application of a high-frequency excitation. The FAO valve assembly also includes a tappet configured to translate relative to the piston body to bias the FAO cover member to selectively cover the FAO passage in response to the application of the low-frequency excitation.

A kinetic seat assembly includes a primary seat cushion frame, a secondary seat cushion frame movable relative to the primary seat cushion frame, a primary seat back frame, a secondary seat back frame movable relative to the primary seat back frame, a pair of lateral dampers extending between the primary seat back frame and the secondary seat back frame, a pair of vertical dampers extending between the secondary seat back frame and the primary seat cushion frame, a pair of fluid reservoirs for providing a fluid into the pair of lateral dampers and the pair of vertical dampers, and an electronic control unit configured to control the rate at which the fluid is provided to and drawn out of each of the dampers to control a damping effect. In embodiments, an end of the lateral dampers is permitted to move freely relative to the secondary seat back frame.

A shock absorber includes: a piston which is connected to an upper end of a rod by a fixing member and moves forward and backward in a cylinder; a conductor member which penetrates the piston from an upper end of an outer tube and extends into the rod; a coil which is provided in the rod so as to be capable of detecting a displacement of the conductor member with respect to the rod; an elastic body made of a resin material which is provided adjacent to the conductor member and on an outer side of an outer peripheral surface of the conductor member; and a support portion which supports an outer peripheral surface of the elastic body so as to restrict movement of the elastic body in a direction intersecting a center line of the conductor member.

An anti-cavitation piston for use with shock absorbers is provided. The anti-cavitation piston enables improved damping performance and pressure balance. An embodiment of the anti-cavitation piston includes a two part main piston having a first piston member coupled to a second piston member and additional ports and valving to control damping and reduce or inhibit cavitation during compression and rebound strokes of the shock absorber. Another embodiment of the anti-cavitation piston includes a twin piston device having a first piston and a second piston and additional boost valves, other valving and electronic valving and ports to control damping and reduce or inhibit cavitation during compression and rebound strokes of the shock absorber.

A vibration damper for a vehicle comprises a damper tube filled with hydraulic fluid, a working piston, which is connected to a piston rod and is arranged movably back and forth within the damper tube, the interior of the damper tube being divided by the working piston into a first working chamber on the piston rod side and a second working chamber away from the piston rod, an auxiliary piston, which is mounted on the piston rod, and a compression stop assembly with a compression stop receptacle mounted inside the damper tube, for receiving the auxiliary piston in the compression stage, wherein the compression stop receptacle comprises a sleeve-shaped region with a constant diameter and has at least one expansion protruding radially from the sleeve-shaped region.

A hydraulic vibration damper comprises a damper tube having a hollow main body, a first end, and a second end opposite to the first end, a piston rod that extends into the damper tube through the second end of the damper tube, a primary piston mounted on the piston rod inside the damper tube, a secondary piston mounted on the piston rod inside the damper tube, and a two-stage jounce cut off assembly mounted directly to, and in direct contact with, an inner surface of the hollow main body of the damper tube, wherein the jounce cut off assembly is located between the first end of the damper tube and the secondary piston, and wherein the jounce cut off assembly is configured to increase a hydraulic resistance to movement of the piston rod through the damper tube when the secondary piston engages the jounce cut off assembly.

A vibration damper includes an end-stop control valve that progressively adds end-of-stroke damping force to complement the damping force provided by a main piston. The end-stop control valve may include a valve piston assembly that has a valve piston insert, a piston that is disposed radially outside the valve piston insert, and a valve disc stack-up that is supported on a hub of the valve piston insert and a valve seat of the piston. The valve piston insert and the piston may be arranged so as to be longitudinally movable relative to one another. Consequently, the preload of the valve disc stack-up increases as the valve piston assembly contacts a catch piston and begins end-of-stroke damping. Transitioning from an initial preload to a maximum preload during the end-of-stroke damping event progressively increases damping resistance and thereby improves NVH characteristics.

A sealing device for hydraulic equipment according to the invention includes an outer member having an annular shape, an inner member inserted into the outer member, and a seal ring housed in an annular groove disposed in the outer circumference of the inner member and abutting on the outer member to prevent a liquid from passing through a gap between the outer member and the inner member. The annular groove of the inner member has a bottom portion including a recess for restraining axial displacement of the seal ring relative to the annular groove.