Korber Ag

Helmut Neumann

Werner Komossa

A shock absorber wherein the piston of the piston-piston rod assembly divides the internal space of the cylinder into first and second chambers. The piston has first and second passages for the flow of fluid between the chambers in response to shifting the assembly relative to the cylinder and/or vice versa. One of these passages is controlled by a first check valve which prevents the flow of fluid through the one passage from the first chamber into the second chamber. A second check valve prevents the flow of fluid through the other passage from the second chamber into the first chamber. The piston-piston rod assembly further defines a plurality of bypasses each of which is controlled by a solenoid valve as well as by a pressure-responsive valve.

Shock absorber with variable damping characteristic

A shock absorber with a variable damping characteristic has a piston which is reciprocable in a cylinder to divide the oil-filled internal space of the cylinder into two chambers. The chambers are connectable to each other by one or more passages so that oil can flow between the chambers in response to movement of the piston relative to the cylinder and/or vice versa. The piston has several bypasses each of which is controlled by an adjustable electrically operated regulating valve. In order to enhance the accuracy of regulation of flow of oil between the chambers by way of the bypasses, the piston is formed with channels which supply oil between the mobile valving elements and the seats of the valves to thus reduce or eliminate friction between such parts. The films of oil between the valving elements and the respective seats from hydrostatic bearings which ensure that the valving elements can leave their open or closed positions, as well as that the valving elements can move between such positions, with a high degree of predictability and faster than in heretofore known regulating valves. The valving elements can be disposed one behind the other in the axial direction of the piston. Alternatively, at least one valving element can surround at least one other valving element. All valving elements can be mounted for movement relative to a single common seat.

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Glinde, Germany

Helmut Neumann