Abstract: An adjustable shock absorber for motor vehicles comprises a cylinder containing damping fluid, a piston rod arranged to be axially displaceable in the cylinder, and a damping piston secured to the inner end of the piston rod. The damping piston divides the cylinder chamber into two working chamber compartments and is provided with fluid flow passages which produce damping forces, the effective cross-section of these flow passages being controllable by a throttling member and an electromagnetic drive controlling the throttling member, with the electromagnetic drive including a coil winding which is mounted in the damping piston. In order to achieve improved control of the damping force the throttling member is under the influence on the one hand of the fluid pressure difference between the two working chamber compartments and on the other hand of a restoring force which is created by the electromagnetic drive.

Abstract: An adjustable shock absorber for motor vehicles has a cylinder containing damping fluid, a piston rod arranged to be axially displaceable in the cylinder, and a damping piston secured to the inner end of the piston rod. The damping piston divides the cylinder chamber into two working chamber compartments and is provided with fluid flow passages which produce damping forces, the effective cross-section of these flow passages being controllable by a throttling member and an electromagnetic drive controlling the throttling member, with the electromagnetic drive including a coil winding which is mounted in the damping piston. In order to achieve improved control of the damping force the throttling member is under the influence on the one hand of the fluid pressure difference between the two working chamber compartments and on the other hand of a restoring force which is created by the electromagnetic drive.

Abstract: A hydropneumatic shock absorber has an outer tube, an inner tube inside the outer tube, forming therewith an outer gas/liquid chamber and itself internally forming an inner chamber and a piston rod inside the inner tube. A body of liquid fills the entire inner chamber and partially fills the outer chamber. A piston on the rod subdivides the inner chamber into an upper and a lower compartment. A foot valve is located at the lower tube ends. A rigid centering washer has an outer periphery engaged against the upper end of the outer tube and an axially extending ridge engaged directly radially against the upper end of the inner tube. A flexible annular outer lip on the washer engages radially against the upper end of the inner tube to bear flexibly to permit limited fluid flow from the upper compartment to the outer chamber while blocking opposite flow. A flexible annular inner seal underneath the ridge on the washer engages radially inwardly against the piston rod.

Abstract: A hydropneumatic shock absorber comprises an outer tube centered on an upright axis, an inner tube coaxially spaced inside the outer tube and forming therewith an outer gas/liquid chamber, a piston rod inside the inner tube, generally coaxial with the tubes, and forming with the inner tube an inner liquid chamber, and a piston carried on the rod and radially outwardly engaging the inner tube, whereby axial displacement of the piston and rod relative to the tubes in one direction pressurizes the inner chamber. A foot valve between the inner and outer chambers permits limited liquid flow therebetween. An annular plug is fixed at the upper axial ends of the tubes and axially upwardly blocks the inner and outer chambers. A guide bushing in the plug surrounds the piston rod and an annular outer seal in the plug surrounds the piston rod above the bushing and forms with the bushing and plug an annular compartment surrounding the rod.

Abstract: A load-carrying, shock absorbing strut is provided comprising an outer tube for carrying a wheel axle journal. There is slidably accommodated in the tube a shock absorber cylinder which is connected with the chassis frame. A downwardly emerging piston rod of the cylinder is fastened to the bottom of the outer tube. Between the shock absorber cylinder and the outer tube there is provided a lubricant annular chamber of constant volume which is closed off above and below by upper and lower guide and sealing rings arranged on the outer tube. A sealing ring is arranged above each guide ring with axially limited play and comprise lubricant-sealing felt rings. To effect good dirt-deflecting action there is present above the upper sealing ring a dirt-deflecting ring which has the dual function of limiting the sealing ring axial play as well as removing dirt from the shock absorber cylinder.