The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1996
Filed:
Mar. 17, 1994
Andreas F orster, Schweinfurt, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
Shock absorber with adjustable damping force, comprising a pressure tube filled with damping medium, in which a piston on an axially movable piston rod divides a work chamber into a piston-side and a non piston-side chamber, whereby there is a damping medium flow between the two work chambers, which is divided into a main flow and a bypass flow, a damping valve device consisting of a damping valve body, with a main stage valve for each flow direction, each of which is formed by a main stage valve body, and a pilot stage valve which activates the main stage valve, an adjustable actuator, which controls a flow connection between the control chamber and a work chamber, whereby the control chamber is limited axially by the first and second spring-loaded main stage valve bodies, whereby the first main stage valve body, during the inflow from the closed valve position into an open position, is moved axially into the control chamber toward the second main stage valve body, which is held in the closed valve position by the damping medium, and when the inflow is in the reverse direction, the second main stage valve body is moved out of the closed valve position into an open position, axially toward the first main valve stage body which is in the closed valve position.