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:
Jan. 22, 2013
Filed:
Mar. 20, 2006
Kazuto Shimizu, Aichi, JP;
Toshiyuki Mizutani, Kuwana, JP;
Masaharu Hori, Kuwana, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
A fluid dynamic bearing apparatus includes shaft member, housing, sleeve portion, and sealing portions. The housingincludes a straight cylindrical inner circumferential surface with a constant diameter and openings at both axial ends thereof. The sleeve portionis provided separately from the housingand fixed to the inner circumferential surface of the housing. A radial bearing gap is formed between the inner circumferential surfaceof the sleeve portionand the outer circumferential surfaceof the shaft member, and thrust bearing gaps are formed between the end facesof the sealing portionsand the end facesof the sleeve portionopposing these to support the shaft memberin a non-contact manner in the radial direction and in the thrust direction by the hydrodynamic effect of a lubricating oil produced in each bearing gap.