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. 20, 2010
Filed:
Feb. 18, 2005
Akira Matsuo, Anjo, JP;
Akihito Hongoya, Anjo, JP;
Mikio Iwase, Anjo, JP;
Yoshinori Shibayama, Anjo, JP;
Makoto Kaneso, Toyota, JP;
Kamishima Hirofumi, Toyota, JP;
Atsushi Hanawa, Toyota, JP;
Koichi Miyamoto, Toyota, JP;
Haruhisa Suzuki, Toyota, JP;
Akira Matsuo, Anjo, JP;
Akihito Hongoya, Anjo, JP;
Mikio Iwase, Anjo, JP;
Yoshinori Shibayama, Anjo, JP;
Makoto Kaneso, Toyota, JP;
Kamishima Hirofumi, Toyota, JP;
Atsushi Hanawa, Toyota, JP;
Koichi Miyamoto, Toyota, JP;
Haruhisa Suzuki, Toyota, JP;
Abstract
An oil pump includes a pump cover covering a recess in a side face of a pump body to form a gear compartment therebetween. A drive gear and a rotatably driven gear are meshed and mounted in the gear compartment. Working spaces R are formed by the engagement of the meshed gear teeth. Discharge ports are formed in both the pump body and the pump cover in communication with the gear compartment. A notch is formed in the pump body at the bottom of the gear compartment and extends from the front end of the discharge port in the pump body to the rear end of a discharge area for the working spaces. Another notch is formed in the inner side face of the pump cover, and extends from the front end of the discharge port in the cover to the rear end of the discharge area.