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. 07, 2009
Filed:
Aug. 15, 2006
William Joseph Foor, Clayton, MI (US);
William Joseph Foor, Clayton, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
Accordingly, the present invention provides a power steering pump having a filter that removes contaminants from fluid flowing through the relief system of the power steering pump. The power steering pump includes a housing having a longitudinal bore communicating with a fluid outlet. A fluid discharge port communicates with the bore and a fluid bypass port also communicates with the bore. A flow control member is situated in the bore and forms a outlet passage communicating with the fluid outlet. A flow control valve is slidably received in the bore. The flow control valve operates to open and allow communication between the fluid discharge port and the outlet passage in the flow control member. When the fluid flow from the fluid discharge port reaches a suitable pressure, the valve opens further to allow fluid flow from the fluid discharge port to the bypass port. A fluid pressure passage communicates pressure from the fluid outlet to a pressure sensing chamber forming part of the flow control valve assembly. A filter located downstream from the flow control member operates to filter fluid passing through the fluid pressure passage, and thereby, prevents contamination from entering the relief system of the power steering pump.