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:
Jul. 10, 2007
Filed:
Dec. 22, 2005
Kosuke Yamane, Gunma-ken, JP;
Masanori Umeno, Gunma-ken, JP;
Keisuke Kashiwa, Gunma-ken, JP;
Hirotaka Eno, Gunma-ken, JP;
Kosuke Yamane, Gunma-ken, JP;
Masanori Umeno, Gunma-ken, JP;
Keisuke Kashiwa, Gunma-ken, JP;
Hirotaka Eno, Gunma-ken, JP;
Yamada Manufactoring Co., Ltd., Kiryu-Shi, Gunma-Ken, JP;
Abstract
An object of the invention is to provide an electric oil pump with greatly improved operation, increased endurance, and extended service life of an Oldham's coupling connecting a drive shaft that rotates a rotor in a pump housing and a motor output shaft in a motor housing. The electric pump comprises a pump housing having a rotor and a drive shaft for rotatably supporting the rotor, and a motor housing connected to the pump housing and having an output shaft connected to the drive shaft via an Oldham's coupling. The pump housing is provided with a coupling chamber for accommodating the Oldham's coupling, and a linking channel for transporting the leaked oil from a rotor chamber accommodating the rotor of the pump housing to the coupling chamber.