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. 05, 2019
Filed:
May. 25, 2016
Mazda Motor Corporation, Hiroshima, JP;
Kenta Honda, Aki-gun, JP;
Tomohiro Koguchi, Higashihiroshima, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Abstract
An oil pump device includes an oil pump () and an electrically operated control valve (). The valve adjusts hydraulic pressures to be applied to a decrease-side control pressure chamber (A) for causing a pump casing () to swing in the discharge amount decrease direction and an increase-side control pressure chamber (B) for causing the pump casing to swing in the discharge amount increase direction so as to hold the pump casing at a predetermined approximately intermediate position between the maximum swing position in the discharge amount decrease direction and the maximum swing position in the discharge amount increase direction by balancing the urging forces of a decrease-side return spring () for urging the pump casing in the discharge amount decrease direction and an increase-side return spring () for urging the pump casing in the discharge amount increase direction when supply of current to the valve is stopped.