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:
May. 18, 1982
Filed:
Jun. 26, 1979
Winfried de Maight, Mutlangen, DE;
Ronald Schutze, Mogglingen, DE;
Zahnradfabrik Friedrichshafen, AG., Friedrichshafen, DE;
Abstract
A throttle valve biased to open position by a spring is interposed in the return line of a steering control valve in a booster steering system. The essential feature of the invention is that one face of the valve is exposed to feed pressure acting against a valve opening bias spring to produce the throttling effect in accordance with construction and design of the valve and the system in which it may be used. The invention is particularly intended for use with booster steering control valves in neutral or steering position and ensures throttling of return flow to the system sump only during a steering operation. The invention is usable in steering mechanisms such as shown in the patent to Wagner et al., U.S. Pat. No. 3,964,371.