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:
Jul. 25, 2017
Filed:
Feb. 19, 2014
Applicant:
Hitachi Automotive Systems Steering, Ltd., Saitama, JP;
Inventors:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD., Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 14/18 (2006.01); F04C 14/22 (2006.01); F04C 2/344 (2006.01); F04C 14/24 (2006.01); B62D 5/06 (2006.01); F04C 2/04 (2006.01); F04C 14/26 (2006.01); F04C 15/00 (2006.01);
U.S. Cl.
CPC ...
F04C 14/223 (2013.01); B62D 5/062 (2013.01); F04C 2/04 (2013.01); F04C 2/344 (2013.01); F04C 14/226 (2013.01); F04C 14/24 (2013.01); F04C 14/26 (2013.01); F04C 15/0057 (2013.01); F04C 2270/58 (2013.01); F04C 2270/585 (2013.01);
Abstract
A variable displacement vane pump and a power steering can secure a discharge flow rate when a steering wheel is turned, and restrict the discharge flow rate when the steering wheel is not turned. In the variable displacement vane pump and power steering system, a bypass line is formed. The bypass line causes a hydraulic fluid in a high pressure chamber of a control valve, which controls an eccentricity of a cam ring, to flow directly to a low pressure chamber side of the control valve. The hydraulic fluid flows directly to the low pressure chamber side of the control valve when the steering wheel is turned.