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:
Jul. 25, 1989
Filed:
Apr. 01, 1988
Heinz Knecht, Eitorf, DE;
Alfred Preukschat, Konigswinter, DE;
Boge AG, , DE;
Abstract
Shock absorber for vehicles, in which there is a damping element, which has a work cylinder holding a damping medium and divided into two work chambers by a piston, whereby at least partly to control the damping force, an electromagnetically activated and axially moving valve body of a valve pressurizes a flow passage. A variable damping adjustment becomes possible, and by means of a variably controlled damping valve, any desired adjustable damping of the decompression and compression stage can be achieved. In addition, by varying the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, designed as the armature of an electromagnet, can be influenced. A seat surface is oriented together with the end surface of the valve body, whereby at least a portion of the end surface of the valve body and of the valve seat are located at a distance from one another. Varying the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, can be influenced. This configuration makes is possible to achieve a partial pressure reduction influencing the valve body in the area of the valve seat.