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:
Apr. 19, 2022
Filed:
Oct. 30, 2017
Taiho Kogyo Co., Ltd., Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Yuji Suzuki, Toyota, JP;
Akihiro Uto, Toyota, JP;
Naoyuki Miyara, Nagoya, JP;
Hiroki Hara, Nagoya, JP;
Shinsuke Kiyomiya, Seto, JP;
Akira Fujii, Toyota, JP;
TAIHO KOGYO Co., Ltd., Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A vane pump includes a housing, a rotor, a vane and a reed valve. A position at which the sliding direction of the vane with respect to the rotor is inverted from outward to inward is defined as a reference position, and a section of the pump chamber on the discharge hole side with respect to the reference position is defined as a discharge section. A pressure relief groove is disposed in a portion of the bottom wall portion corresponding to the discharge section with a clearance secured between the peripheral wall portion and the pressure relief groove. When the vane overlaps the pressure relief groove, a pair of the working chambers communicate with each other via the pressure relief groove.