August Bilstein Gmbh & Co Kg

August Bilstein Gmbh & Co.

Max-Otto Rauert

Johannes J De Baan

Josef Ladic

Bernd Oldach

Dietrich Petzsch

Jurgen Bock

Hugo Emde

Hans Munning

Ewald May

Jurgen Doench

Heinrich Sporenberg

The invention relates to shock-absorber pistons which have a piston body mountable on a piston shaft, the piston body having on both faces a circumferential chamber and these chambers being covered by valve spring disks which rest on circumferential shoulders around the circumferential chambers. The piston body has counterflow channels each leading from the circumferential chamber on one face to an aperture outside the circumferential shoulder on the opposite face. In order especially to produce a degressive response to shock as speed increases, and for this purpose to lower the transit flow resistance of the piston body as much as possible, this body is provided with a flattened zone outside of the circumferential shoulder, and provided with transit channels covering the entire area of the body except for radial partitions between the channels, the transit channels extending from radially narrow circumferentially elongated arc shaped slots to circumferentially-short or radially broad trapezoidal openings into the circumferential chambers.

Shock absorber piston

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. Preferably, a hydraulic compensating device which reinforces this restoring force is provided between the throttling member and the electromagnetic drive which counteracts the hydraulic displacement of the throttling member.

Adjustable shock absorber, especially for motor vehicles

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. Preferably, a hydraulic compensating device which reinforces this restoring force is provided between the throttling member and the electromagnetic drive which counteracts the hydraulic displacement of the throttling member.

Growing community of inventors

Ennepetal, Germany

Max-Otto Rauert