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. 10, 2009
Filed:
Dec. 21, 2005
Kazuo Enzaka, Gunma-ken, JP;
Masahiro Kasahara, Gunma-ken, JP;
Yasunori Ono, Gunma-ken, JP;
Kenichi Fujiki, Gunma-ken, JP;
Keiichi Kai, Gunma-ken, JP;
Yoshiaki Senga, Gunma-ken, JP;
Atsushi Kaneko, Gunma-ken, JP;
Kazuo Enzaka, Gunma-ken, JP;
Masahiro Kasahara, Gunma-ken, JP;
Yasunori Ono, Gunma-ken, JP;
Kenichi Fujiki, Gunma-ken, JP;
Keiichi Kai, Gunma-ken, JP;
Yoshiaki Senga, Gunma-ken, JP;
Atsushi Kaneko, Gunma-ken, JP;
Yamada Manufacturing Co., Ltd., Kiryu-shi, Gunma-ken, JP;
Abstract
A trochoid oil pump, which enables the endurance to be increased and the reduction of discharge pulsations and noise to be achieved, and in which those results can be realized with a very simple structure. An interdental space constituted by an inner rotor and an outer rotor having trochoid tooth profile or substantially trochoid tooth profile starts a compression stroke in the location of a partition section between an intake port and a discharge portion, and a linking gap L is composed by the interdental space and a preceding adjacent interdental space realized in a discharge stroke. The linking gap expands gradually from the start of compression stroke to the discharge stroke.