Patent ID: 7017719

Claim:
A vibration damper with adjustable damping force, comprising: a pressure tube in which a piston rod with a piston is guided with freedom of axial movement, the piston dividing the pressure tube into a working space around the piston rod and a working space away from the piston rod, the working spaces being filled with damping medium; a fluid connection comprising a mainstream and a sidestream connecting the two working spaces, the fluid connection being wholly outside the piston, the damping medium moving in a first direction through the connection when the piston rod is moving inward and a second direction through the connection when the piston rod is moving outward; a first adjustable damping valve in the fluid connection, the first adjustable damping valve receiving damping medium moving in the first direction and directing the damping medium to the working space around the piston rod and to a compensating space, the first adjustable damping valve comprising a mainstream channel leading to the working space around the piston rod and a sidestream channel leading to the compensating space, whereby the first adjustable damping valve can be controlled by the sidestream; and a separating wall in a first control space, the sidestream channel being located in the separating wall and connecting the sidestream to the mainstream channel for directing the mainstream from the working space away from the piston rod to the compensating space.