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:
Apr. 24, 2007
Filed:
Aug. 15, 2005
Kazuyoshi Uchino, Saitama, JP;
Kazuyoshi Uchino, Saitama, JP;
Unisia JKC Steering Systems Co., Ltd., Kanagawa, JP;
Abstract
Within a cam ring (), a rotor having a plurality of vanes () is eccentrically disposed. A metering orifice () is provided halfway on a discharge passage () of pressure fluid discharged from the pump, and a control valve is activated due to a pressure difference between the upstream and downstream sides of the metering orifice (). A fluid pressure of the first fluid pressure chamber () is controlled by activation of the control valve (). The second fluid pressure chamber () is shut off from the control valve () to introduce a pressure on the suction side at any time. To return the cam ring () in a direction of expanding a pump chamber (), an internal pressure of the cam ring () is applied in the return direction.