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:
Jun. 10, 2008
Filed:
Jul. 15, 2004
Kenichi Fujiki, Gunma-ken, JP;
Masaru Amano, Gunma-ken, JP;
Kenichi Fujiki, Gunma-ken, JP;
Masaru Amano, Gunma-ken, JP;
Yamada Manufacturing Co., Ltd., Kiryu-shi, JP;
Abstract
A trochoidal oil pump which makes it possible to achieve an improved reduction in discharge pulsation and noise, and which makes it possible to realize such a reduction using an extremely simple structure. The trochoidal oil pump of the present invention comprises a rotor chamberwhich has an intake portand discharge port, an outer rotorand an inner rotor. A plurality of inter-tooth spaces S, S, . . . that are formed by the tooth shapesandof the inner rotorand outer rotorcomprise a maximum sealed space Sthat is positioned in the region of the partition partbetween the intake portand discharge port, a plurality of inter-tooth spaces S, S, . . . within the region of the intake port, and a plurality of inter-tooth spaces S, S, . . . within the region of the discharge port. The plurality of inter-tooth spaces S, S, . . . in the intake portand discharge portrespectively communicate with each other