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:
Feb. 18, 1986
Filed:
Apr. 09, 1984
Stanley E Anderson, Saginaw, MI (US);
Leonard N Franklin, Jr, Reese, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A demand responsive flow control valve mechanism has a valve member which receives fluid flow from a power steering pump and delivers a predetermined amount of fluid to an operating system such as the power steering gear. The excess fluid delivered by the pump is directed by the valve member to a bypass port from which the excess fluid is returned to the pump or a reservoir. The fluid flow to the operating system is controlled by differential areas disposed on a spool valve and a flow regulating orifice sensitive to system flow from determining the pressure differential to be applied to the differential areas. The operating system has a variable orifice which serves as a demand regulator for establishing the pressure level requirements for the pump. The valve spool responds to the pressure differential and system pressure level to bypass fluid as required. A pair of check valves are disposed in the spool valve and are operable to provide two stages of pressure relief for the operating system.