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:
Oct. 12, 2010
Filed:
Apr. 21, 2008
Yukio Itami, Yokohama, JP;
Kensuke Masuda, Kodaira, JP;
Yoshihiro Takahashi, Miyagi, JP;
Tomotaka Takamura, Miyagi, JP;
Noriyuki Kadowaki, Miyagi, JP;
Yukio Itami, Yokohama, JP;
Kensuke Masuda, Kodaira, JP;
Yoshihiro Takahashi, Miyagi, JP;
Tomotaka Takamura, Miyagi, JP;
Noriyuki Kadowaki, Miyagi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Tohoku Ricoh Co., Ltd., Shibata-gun, JP;
Abstract
A hydrodynamic bearing unit using oil includes a shaft to be driven, a bearing member configured to support the shaft in a non-contact manner through a bearing gap by a hydrodynamic pressure of the oil, which is generated in the bearing gap while the shaft relatively rotate with respect to the bearing member, a housing configured to house the bearing member and having an opening at one end thereof, another end thereof being enclosed, a sealing member configured to seal a part of the opening of the housing, a channel configured to communicate a space formed between the shaft, the bearing member and the housing with an outside air, and a pressing member configured to press and fix the bearing member on the housing. At least one open part configured to release an air bubble contained in the housing is provided between the bearing member and the sealing member.