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. 28, 2017
Filed:
Aug. 28, 2013
Aisin Aw Co., Ltd., Anjo-shi, Aichi-ken, JP;
Takahiro Torii, Hekinan, JP;
Kengo Nomura, Nukata, JP;
Minoru Todo, Takahama, JP;
Mikio Iwase, Anjo, JP;
Koji Ota, Anjo, JP;
Mitsuhiro Takeda, Toyota, JP;
Naoki Okoshi, Anjo, JP;
Takumi Uchida, Obu, JP;
AISIN AW CO., LTD., Anjo-shi, JP;
Abstract
In a gear pump, an outer inner wall surface of a suction port which is located on a downstream side in a rotor rotation direction, that is, a first inner wall surface, is located inward of a bottom land between internal teeth of an outer rotor, and the suction port has a shallow portion extended inward from the first inner wall surface on the downstream side in the rotor rotation direction, and a deep portion that is formed so as to be continuous with the shallow portion and that is deeper than the shallow portion. Communication between an inter-tooth chamber and the suction port is cut off with the inter-tooth chamber facing only the shallow portion.