Patent ID: 7104369

Claim:
A vibration damper comprising: a cylinder filled with damping medium; a piston rod connected to a piston in said cylinder, said piston separating said cylinder into a working space on the piston rod side and a working space away from the piston rod, said piston having at least one first through-channel with a respective at least one outlet for flow in a first direction; a bypass which connects the working space on the piston rod side to the working space away from the piston rod as a function of the position of the piston in the cylinder; and a first valve disk covering said outlet of said at least one first through-channel, said first valve disk being movable from a closed position to an open position, said first valve disk having a first pressure-actuated surface and a second pressure-actuated surface which are separated when the first valve disk is in the closed position, said first pressure-actuated surface being exposed to pressure via said at least one through channel, said second pressure-actuated surface being exposed to pressure via said bypass as a function of the position of the piston in the cylinder.