Abstract: A vibration damper for motor vehicles typically has an external tube, a piston rod and fastening parts for fastening the vibration damper to the wheel suspension and the vehicle body. To prevent friction and or contact corrosion on the surfaces between the external tube and the fastening parts, at least the contact surfaces are provided with a protective metallic aluminum layer.

Abstract: Impact damper for motor vehicles, the impact damper having two tubes which can be pushed one inside the other, the inner tube consisting of a first and second fluid chamber and a gas chamber separated from the first fluid chamber by a separating piston. A third fluid chamber, separated from the second fluid chamber by a work piston can extend the tubes relative to one another by changing the pressure within the fluid chambers.

Abstract: A hydraulic, adjustable vibration damper has an electromagnetically activated damping valve to at least partly control the damping force. In the electromagnet of the damping valve, the base of the armature guide and the end surface of the armature adjacent to the base are configured so that there is at least one recess in one of the parts, into which at least one recess, at least one correspondingly configured extension on the other part projects. With this configuration, the electromagnet is able to attain high forces, largely independent of the distance, over a short work stroke of the armature of the electromagnet.

Abstract: An adjustable vibration damper for motor vehicles has a cylinder containing a damping fluid, an axially-movable piston rod projecting into the cylinder in a sealed manner, and a damping piston fastened to the piston rod to divide the cylinder into two work chambers, whereby a damping valve equipped with an axially movable valve body and a valve seat controls the effective cross section of a damping passage. For this purpose, the valve body, starting from its pressurized end surface, has at least one constant throttle cross section running toward the back side of the valve body, and an additional throttle passage running in the outflow direction, whereby a pilot control element for regulating flow through the additional throttle passage is located in a recess inside the valve body.

Abstract: Impact damper for motor vehicles, the impact damper having two tubes which can be pushed one inside the other, the inner tube having a first and second fluid chamber and a gas chamber separated from the fluid chamber by a separating piston. A third fluid chamber is located behind a work piston and the tubes can be retracted or extended by changing the pressure within the fluid chambers of the impact damper.

Abstract: Hydraulic, adjustable vibration damper, such as for motor vehicles, in which, parallel to the damping valves, there is a bypass whose control body can be closed by a simple hydraulically or pneumatically pressurized adjustment apparatus, and opened by the internal system pressure of the vibration damper. For this purpose, the control body is equipped with a pressure intensifier, whereby on its external circumferential surface, an annular surface is created by a smaller-diameter portion for the application of the system internal pressure.

Abstract: A hydraulically damping rubber, elastomer an/or resilient bearing with at least one fastener is provided. The fastener is configured and designed to be fastened to a vehicle body. The bearing includes at least two fluid chambers containing damping fluid. The fluid chambers are located axially one behind the other in the elastomer body of the bearing. The elastomer body of the bearing is, preferably, designed as a one-piece component. A partition is provided in the bearing to separate the fluid chambers. The partition supports a disk and the partition, the disk and the elastomer body define the configuration of the fluid chambers. A ring-shaped element is also, preferably, provided, which at least, defines a fluid flow connection, or passageway, between the fluid chambers.

Abstract: Controllable vibration dampers for motor vehicles that include a cylinder which contains a damping medium and an axially movable piston rod sealed and submerged in the medium. A damping piston is attached to the piston rod and subdivides the cylinder into a two work chambers. A hollow piston is provided with at least one valve disc which is movable within the piston. The disc moves into and out of engagement with ledge or edge structures provided within the piston when a dampening medium is directed against and past the disc.