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. 11, 1990
Filed:
Sep. 13, 1989
Holger V Hayn, Bad Vibel, DE;
Juergen Rausch, Eschborn/Ts., DE;
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
A master brake cylinder (2) communicates with wheel brakes through brake conduits (8, 9). Pumps (20, 21) deliver fluid to the brake conduits (8, 9) through pressure conduits (22, 23). Upon commencement of an anti-lock control, the pump drive M is turned on and check valve (26) in the brake conduit is blocked. In conventional systems, the check valve could, during a control operation, open upon an increased pressure fluid requirement of the wheel brakes. Use of a diaphragm in the pressure conduit (22) insures that the dynamic pressure in the chamber (37) will hold the switch piston (28) in all circumstances in a displaced position so that the valve ball (45) blocks the valve passage (46), and the brake conduit (8) is interrupted.