A hydraulic damper for a vehicle including a main tube. A first piston assembly is slideably disposed in the main tube and axially divides the main tube into a rebound chamber and a primary compression chamber. A hydraulic compression stop assembly is disposed in the primary compression chamber and includes a narrowed section extending between an open end and a closed end. A second piston assembly is slideably disposed in the narrowed section and is coupled with the first piston assembly. The second piston assembly has a piston tube that extends between an opened end and a shut end. A displaceable partition is slideably disposed in the piston tube. A first auxiliary compression chamber is defined between the partition and the closed end of the narrowed section. A second auxiliary compression chamber is defined between the partition and the shut end of the piston tube.

The present invention relates to a variable load hydraulic control device comprising an inner tube able to be coupled to an upper tubular head to form an internal chamber and an external chamber, in addition to an inner casing, a floating piston, able to slide between the inner tube and the inner casing , a retaining ring, an upper spring, located between the floating piston and an extension of a washer located inside the upper tubular head, a lower spring, located between the floating piston and an extension of the inner casing, a control surface, a leak opening to communicate the external chamber and the internal chamber, wherein the static load of the hydraulic control device determines the position of the floating piston and the section of passage through the leak opening.

A hydraulic vibration damper may include inner and outer tubes filled with damping liquid, a piston rod projecting axially out of the inner tube and movable in rebound and compression directions, a sealing and guide pack that sealingly closes an end of the outer tube and guides piston rod movement, a working piston for producing damping forces that is fastened to the piston rod and is guided on an inner lateral surface of the inner tube and subdivides the interior of the inner tube into a piston rod-side and piston rod-remote working spaces. The vibration damper has rebound and compression stops. In the piston rod-remote working space, a compression stop, starting from a predetermined retraction travel of the piston rod, may produce a travel- and speed-dependent compression stop force.

The present invention relates to, among other things, a rotational damper comprising a fluid-filled damper housing and within the damper housing a piston rotatably accommodated by a rotation axis of the rotational damper in a first direction and an opposite second direction with a piston rod extending in the direction of the rotation axis; whereby the piston has at least one opening with a flow cross-section which allows for the flow of fluid through the piston, whereby a total flow cross-section is calculated as the sum of the flow cross-sections of the at least one opening. A blocking device can be furthermore assigned to the piston which is capable of reducing the flow cross-section of at least one of the openings during a rotation of the piston in a first direction relative to a rotation of the piston in the second direction.

A hydraulic damper for a vehicle including a main tube. A first piston assembly is slideably disposed in the main tube and axially divides the main tube into a rebound chamber and a primary compression chamber. A hydraulic compression stop assembly is disposed in the primary compression chamber and includes a narrowed section extending between an open end and a closed end. A second piston assembly is slideably disposed in the narrowed section and is coupled with the first piston assembly. The second piston assembly has a piston tube that extends between an opened end and a shut end. A displaceable partition is slideably disposed in the piston tube. A first auxiliary compression chamber is defined between the partition and the closed end of the narrowed section. A second auxiliary compression chamber is defined between the partition and the shut end of the piston tube.

A hydraulic damper for a vehicle including a main tube. A first piston assembly is slideably disposed in the main tube and axially divides the main tube into a rebound chamber and a primary compression chamber. A hydraulic compression stop assembly is disposed in the primary compression chamber and includes a narrowed section extending between an open end and a closed end. A second piston assembly is slideably disposed in the narrowed section and is coupled with the first piston assembly. The second piston assembly has a piston tube that extends between an opened end and a shut end. A displaceable partition is slideably disposed in the piston tube. A first auxiliary compression chamber is defined between the partition and the closed end of the narrowed section. A second auxiliary compression chamber is defined between the partition and the shut end of the piston tube.

A shock absorber is provided that includes a shock body and a shaft assembly. The shock body has an inner chamber. The inner chamber is defined by a cylindrical interior surface. At least one groove is formed in the interior surface within at least one select length of the shock body. A piston of the shaft assembly is received within the inner chamber of the shock body. The piston includes valving to allow dampening matter that is received within the inner chamber to pass through the piston to allow the piston to move within the inner chamber. The at least one groove that is formed within the interior surface is configured to allow at least some of the dampening matter to bypass the valving of the piston to allow the piston to move through the at least one select length with less resistance.

A hydraulic damper includes a hydraulic compression stop arrangement having an insert including a bottom and a fixing member including a body. The bottom is attached to the body through a locking connection preventing axial movement of the insert and transferring pressure exerted on the insert to the fixing member and allowing the cavity of the insert to receive the additional piston during the compression stroke to provide an additional damping force. The body includes a locking plate and the bottom includes a locking yoke with the locking yoke being secured to the locking plate to define the locking connection. The fixing member includes a head and the locking plate extends radially outwardly from the head defining a recess extending about the center axis. The locking yoke, having an arcuate shape and an L-shaped cross section, extends axially outwardly from the bottom to engage the recess forming the locking connection.

A substantially tubular sleeve is arranged in a damping space of the damper containing a damping fluid and has at least one recess at least in an inner face of the sleeve. The recess defines a flow channel for the damping fluid for adaptation of the flow impedance (F) for the damping fluid at least in a direction along a longitudinal axis (LA) of the sleeve. The sleeve is rigidly and releasably connected to the outer body by a number of contact surfaces on an outer surface of the sleeve and/or has at least one guide surface arranged on an inner surface of the sleeve for guiding the piston over the travel path (H).

Also disclosed is a system for modular assembly of a plurality of dampers, method of manufacture for a sleeve, and a method of production for a damper.

The hydraulic shock-absorber comprises a hydraulic stop member having a cup-shaped body, which is adapted to be mounted in a compression chamber, and a plunger, mounted at an end of a rod of the shock-absorber so as to slide in the cup-shaped body when the shock-absorber moves towards the compression end-of-travel position. The cup-shaped body comprises a side wall and a bottom wall which define, along with the plunger, a working chamber in which a damping fluid of the shock-absorber is compressed by the plunger when the latter slides in the working chamber towards the bottom wall of the body. Axial channels are formed on the inner surface of the side wall of the body and allow the damping fluid to flow axially out of the working chamber when the plunger slides in the working chamber towards the bottom wall of the cup-shaped body. The axial channels extend parallel to a longitudinal axis (z) of the cup-shaped body and have a cross-section whose area decreases continuously along this axis (z) towards the bottom wall of the cup-shaped body.