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. 10, 2009
Filed:
Aug. 30, 2006
Joey D. Edson, Seymour, MO (US);
Randy C Foster, Strafford, MO (US);
Richard J. Meckstroth, Vonore, TN (US);
Billy L. Speer, Springfield, MO (US);
Joey D. Edson, Seymour, MO (US);
Randy C Foster, Strafford, MO (US);
Richard J. Meckstroth, Vonore, TN (US);
Billy L. Speer, Springfield, MO (US);
Fluid Routing Solutions, Inc., Rochester Hills, MI (US);
Abstract
An electrically actuated, hydraulic power steering system is provided. The steering system includes a hydraulic pump for generating hydraulic pressure, a hydraulic fluid reservoir, a hydraulic cylinder, and a control valve arrangement that selectively connects the hydraulic cylinder to the pump and the hydraulic fluid reservoir. The control valve arrangement is characterized during the on-center position by a first and a second chamber of the hydraulic cylinder being in fluid communication with each other but not with the fluid reservoir. In one embodiment, the steering system has a steering sensor, a control box, and two pressure accumulators for providing at least two levels of steering assist.