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. 26, 2015
Filed:
Oct. 14, 2011
Ryouichi Kubo, Kashihara, JP;
Yasuhiro Tomagou, Yao, JP;
Akihiko Shiina, Kashihara, JP;
Masahiko Sakamaki, Yao, JP;
Tetsuya Ozaki, Kitakatsuragi-gun, JP;
Ryouichi Kubo, Kashihara, JP;
Yasuhiro Tomagou, Yao, JP;
Akihiko Shiina, Kashihara, JP;
Masahiko Sakamaki, Yao, JP;
Tetsuya Ozaki, Kitakatsuragi-gun, JP;
JTEKT CORPORATION, Osaka-shi, JP;
Abstract
A hydraulic power steering system includes: a hydraulic cylinder in which an interior is partitioned into first and second hydraulic chambers by a piston on a steered shaft; a variable displacement electric pump that supplies hydraulic fluid to the hydraulic cylinder; a selector valve selectively set in a mode in which the hydraulic fluid is supplied to the first hydraulic chamber and drained from the second hydraulic chamber or in a mode in which the hydraulic fluid is supplied to the second hydraulic chamber and drained from the first hydraulic chamber; a detector that detects torque, steering angle, and/or vehicle speed; and a controller.