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. 23, 1993
Filed:
Oct. 23, 1991
Masahiko Hara, Kanagawa, JP;
Atsugi Unisia Corporation, Atsugi, JP;
Abstract
A vane pump is disclosed, which comprises a body structure defining a space which has mutually opposed surfaces; a cam ring tightly disposed in the space; a rotor having a plurality of radially extending vane mounting grooves and rotatably disposed in the cam ring having both sides thereof slidably contacting with the opposed surfaces of the body structure; and a plurality of vanes slidably disposed in the vane mounting grooves in such a manner that heads of the vanes slidably contact with an inner surface of the cam ring. In the invention, the rotor is formed at at least one side thereof with a throttle groove to which bottom portions of the vane mounting grooves are exposed.