Abstract: A vibration damper having a sensitive response behavior at very low amplitudes comprises a separating piston being disposed inside a bypass so as to move axially freely. The separating piston divides the bypass into two chambers mutually sealed from one another. Two valves are disposed in the bypass. The first valve acts in a compression stage as a pressure limiting valve and as a non return valve in an extension stage. The second valve acts as a pressure limiting valve in the extension stage and as a non return valve in the compression stage.

Abstract: The invention relates to a vibration damper having an amplitude-selective damping device, comprising a damper tube (1) which is filled with damping fluid and in which a piston rod (2) is disposed in such a manner as to be able to move in a reciprocating manner, said piston rod supporting a damping piston (5) which divides the inner space of the damper tube (1) into a piston rod-side working chamber (3) and a working chamber (4) remote from the piston rod, a space (6) to receive damping fluid, which space is disposed inside a bypass provided between the working chambers (3, 4) and hydraulically in parallel with the damping piston (5) and in which an axially moveable separating piston (7) is disposed which divides the space (6) into a piston rod-side chamber (8) and a chamber (9) remote from the piston rod, wherein the bypass comprises at least a first hydraulic connection channel (10), via which the piston rod-side working chamber (3) is connected to the piston rod-side chamber (8), and at least a second

Abstract: A shock-absorbing piston for hydraulic fixtures, especially hydraulic dashpots for motor vehicles, and separating two hydraulics chambers. The body of the piston is breached by one or more ports. The end of each is blocked by a resilient or resiliently loaded cap. The object is to improve the flow of hydraulic fluid. The ports (13 & 14) are sickle-shaped and the cap rests eccentric against the face of the piston's body (16).

Abstract: A shock-absorbing piston for hydraulic fixtures, especially hydraulic dashpots for motor vehicles, and separating two hydraulics chambers. The body of the piston is breached by one or more ports. The end of each is blocked by a resilient or resiliently loaded cap. The object is to improve the flow of hydraulic fluid. The ports (13 & 14) are sickle-shaped and the cap rests eccentric against the face of the piston's body (16).