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, 1984
Filed:
Mar. 09, 1983
Applicant:
Inventor:
Paul O Wendler, Saginaw, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417283 ; 417299 ; 417310 ;
Abstract
A hydraulic power steering system has a vane type pump which is operable to supply fluid to a power steering gear at a volumetric rate determined in part by the system pressure or system demand. The flow from the pumping chambers is partially bypassed through a bypass passage formed between the cam ring and the pump thrust plate. The bypass passage is urged to the open position by a bypass spring which urges separation between the cam ring and the thrust plate. The pressure plate of the pump responds to system pressure or demand to urge the cam ring into abutment with the thrust plate thereby reducing the opening and decreasing the bypass flow.