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. 28, 2002
Filed:
Jun. 16, 2000
Wendell L. Gilbert, Pleasant Shade, TN (US);
David E. Panter, Jr., Lebanon, TN (US);
TRW Inc., Lyndhurst, OH (US);
Abstract
A hydraulic power steering system ( ) for turning steerable wheels of a vehicle. The system ( ) comprises a steering gear ( ) including a hydraulic motor and a steering valve. The steering gear is susceptible to pressure fluctuations that cause noise during steering. The system ( ) further comprises a pressure relief valve ( ) having an unactuated condition and actuated conditions. The pressure relief valve ( ), in the unactuated condition, restricts fluid flow through the pressure relief valve ( ). In an actuated condition, the pressure relief valve ( ) permits fluid flow through the pressure relief valve ( ). The pressure relief valve ( ) progressively is operable from the unactuated condition to an actuated condition as a pressure differential between the inlet ( ) and the outlet ( ) of the steering gear ( ) increases.