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:
Nov. 04, 2003
Filed:
Aug. 26, 2002
Thomas C. Rytlewski, Auburn, MI (US);
David R. Aden, Saginaw, MI (US);
James L. Davison, Freelan, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid from a first discharge port to the primary discharge outlet, and a second fluid passageway within the housing passes fluid from a second discharge port to a common port of the flow control valve. In a first position, the valve directs fluid from the second discharge port to the primary discharge outlet. In a second position, the valve diverts fluid from the second discharge port to the auxiliary discharge outlet. The valve may be positioned in response to such operating conditions as excessive pressure differential between the high and low-pressure sides, excessive pump rate of rotation (RPM), or excessive rate of fluid flow, among others.