Patent ID: 7743895

Claim:
A vibration damper comprising: a cylinder; a piston rod guided with freedom of axial movement in the cylinder; a first piston fixed to the piston rod so that the first piston is stationary with respect to the piston rod, said first piston bounding a first working space facing away from the piston rod; a second piston mounted on the piston rod with freedom to move axially with respect to the first piston against the force of at least one restoring spring, said second piston bounding a second working space facing the piston rod and an intermediate working space between the pistons; at least two openings equipped with non-return valves in each of said pistons, said openings connecting said working spaces; and a hydraulic pressure stop limiting the movement of said second piston in at least one direction with respect to said first piston; wherein the pressure stop comprises a displacer sleeve and a stop cup, said displacer sleeve being received in said stop cup to limit movement of said second piston with respect to said first piston, and the restoring spring delimits an annular space between the restoring spring and the piston rod, the displacer sleeve being located inside the annular space and the displacer sleeve has a cross-section which increases as it enters the stop cup, thereby increasing throttling of hydraulic fluid as the sleeve enters the cup.