Patent ID: 7628256

Claim:
A vibration damper providing amplitude-dependent damping for motor vehicles, comprising: a first damping device including a piston rod which is disposed in a damping tube so as to moveable in an oscillating manner axially therein, and a damping piston supported by the piston rod which divides an interior of the damping tube into a piston rod-side working chamber and a working chamber remote from the piston rod; and a second damping device being disposed hydraulically parallel to the damping piston and comprising an equalizing chamber which is disposed in a hollow chamber of the piston rod, each end surface of the hollow chamber axially delimiting the equalizing chamber including at least one recess, the at least one additional permanent magnet being inserted into the at least one recess, said equalizing chamber being divided into a first partial chamber and a second partial chamber by a separating piston which is disposed so as to be axially displaceable in the equalizing chamber, the first partial chamber being hydraulically connected to the piston rod-side working chamber and the second partial chamber being hydraulically connected to the working chamber remote from the piston rod, the separating piston including at least one permanent magnet, and at least one additional permanent magnet being disposed in each end region of the equalizing chamber, the at least one permanent magnet and the at least one additional permanent magnet being disposed with respect to one another such that magnetic poles having the same polarity face each other in end positions of the axial displacement capability of the separating piston, only a single one of said at least one additional permanent magnet being disposed in each said end region of the equalizing chamber, the at least one additional permanent magnet being pressed into the at least one recess of the end surface, and being thus connected to the piston rod by a press-fit arrangement a hydraulic connection between the working chamber remote from the piston rod and the second partial chamber being formed by a bore penetrating the piston rod and the at least one additional permanent magnet.