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:
Mar. 25, 2014
Filed:
Aug. 29, 2011
Yuki Nakamura, Kariya, JP;
Kunihito Ando, Okazaki, JP;
Nobuhiko Yoshioka, Anjo, JP;
Takahiro Naganuma, Kariya, JP;
Tomoaki Kawabata, Takahama, JP;
Yuki Nakamura, Kariya, JP;
Kunihito Ando, Okazaki, JP;
Nobuhiko Yoshioka, Anjo, JP;
Takahiro Naganuma, Kariya, JP;
Tomoaki Kawabata, Takahama, JP;
Advics Co., Ltd., Kariya, Aichi-Pref., JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Abstract
A rotary pump device is provided in which a drive shaft is inserted into a center hole of a cylinder that forms rotor chambers, and into outer rotors and inner rotors of rotary pumps. In the rotary pump device, seal mechanisms that include hollow-shaped resin members and annular rubber members are arranged on an opposite side to the cylinder with respect to the rotary pumps. Metal rings are arranged in hollow portions of the resin members in the seal mechanisms so that the drive shaft is inserted into an inner periphery of the metal rings with a minimum clearance.