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:
Jul. 28, 2020
Filed:
Oct. 25, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Aisin Aw Co., Ltd., Anjo-shi, Aichi-ken, JP;
Takafumi Inagaki, Toyota, JP;
Yoshinobu Soga, Toyota, JP;
Shuji Moriyama, Nagakute, JP;
Yusuke Ohgata, Miyoshi, JP;
Yuji Hattori, Ichinomiya, JP;
Kazumichi Tsukuda, Okazaki, JP;
Akihiko Noborio, Tokai, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
AISIN AW CO., LTD., Anjo, JP;
Abstract
A vane oil pump includes a rotor including a plurality of slits, a housing having an inner circumferential cam surface such that a first pump unit and a second pump unit taking in and discharging oil in accordance with rotation of the rotor are separately disposed in a rotational direction of the rotor, a plurality of vanes respectively fitted in the slits of the rotor, and a pressure adjusting device configured to adjust a second discharge pressure of the second pump unit to a lower pressure than a first discharge pressure of the first pump unit. A back pressure groove is disposed on the housing and is provided to supply back pressure oil to a bottom portion of each slit.