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. 04, 2020
Filed:
Dec. 13, 2016
Showa Corporation, Gyoda-shi, JP;
Toshio Nishikawa, Haga-gun, JP;
Showa Corporation, Gyoda-shi, JP;
Abstract
An embodiment provides a vane pump device includes multiple vanes; a rotor that includes vane grooves which support the vanes so that the vanes can move in a radial direction of rotation and which form columnar grooves accommodating oil on a rotation center side, and that rotates due to a rotating force received from a rotation shaft; a cam ring that includes an inner circumferential surface facing an outer circumferential surface of the rotor, and surrounds the rotor; and an inner plate that covers an opening of the cam ring. The inner plate includes a first recess portion that supplies low pressure oil to the columnar grooves, a second recess portion that is formed away from the first recess portion, and supplies high pressure oil to the columnar grooves, and an inner-plate first groove connected to the first recess portion and the second recess portion.