Patent ID: 7156214
Filing Date: 2007-01-02
Classification: F16F

Abstract:
1. A vibration damper comprising: a cylinder filled with damping medium; a piston rod guided in the cylinder in an axially movable manner, the piston rod carrying a first piston which divides the cylinder into a work space on the piston rod side and a work space remote from the piston rod; at least one damping valve arranged in the first piston and connecting the work space on the piston rod side to the work space remote from the piston rod; and an amplitude-selective damping device providing damping separately from the at least one damping valve and comprising a housing which is axially movable in one of the work spaces, a second axially movable separating piston contained in the housing and separating the housing into a first work chamber and a second work chamber, and a bypass connecting at least one of the work spaces to the first work chamber; and a switchable valve controlling the bypass.