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. 01, 2014
Filed:
Mar. 19, 2010
Chiharu Nakazawa, Kawasaki, JP;
Yoshiki Sakamoto, Atsugi, JP;
Ryohei Maruo, Kawasaki, JP;
Toshihiro Koizumi, Atsugi, JP;
Chiharu Nakazawa, Kawasaki, JP;
Yoshiki Sakamoto, Atsugi, JP;
Ryohei Maruo, Kawasaki, JP;
Toshihiro Koizumi, Atsugi, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
A gear pump includes: a drive shaft; a first gear; a second gear; a first plate disposed between the first gear and the second gear, and arranged to liquid-tightly seal the first surfaces of the first and second gear; a pair of second plates disposed, respectively, on the second surfaces of the first and second gears, and arranged to liquid-tightly seal the second surfaces of the first and second gears, each of the second plates including a tooth top sealing portion having a seal surface arranged to seal a tooth top of the first gear and a tooth top of the second gear, and to form a suction portion with the first plate and the second plate; and an urging member arranged to urge the drive shaft toward the seal surface of the tooth top sealing portion of one of the first and second plates.