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:
Mar. 10, 2020
Filed:
Dec. 22, 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 movably support the vanes and which are formed with columnar grooves accommodating oil on rotation center side, and that rotates due to a rotating force received from a rotation shaft; a cam ring that surrounds the rotor; and an inner plate that is disposed on one end portion side of the cam ring in a direction of a rotation axis to cover an opening of the cam ring. The inner plate includes a first portion that is provided to face the grooves, and supplies low pressure oil to the grooves, and a second portion which is provided to face the grooves, supplies high pressure oil to the grooves, and has a width in a radial direction of rotation which is different from that of the first portion in the radial direction of rotation.