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:
Sep. 13, 2011
Filed:
Mar. 26, 2009
Itsuo Murata, Aichi-gun, JP;
Masaya Soeda, Aichi-gun, JP;
Masaharu Hori, Kuwana, JP;
Masaaki Toda, Ama-gun, JP;
Itsuo Murata, Aichi-gun, JP;
Masaya Soeda, Aichi-gun, JP;
Masaharu Hori, Kuwana, JP;
Masaaki Toda, Ama-gun, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
The fluid dynamic bearing device includes a housing, two bearing sleeves fixed to the housing at positions axially spaced apart from each other, and a shaft member inserted along inner peripheries of the bearing sleeves. The housing includes a spacer portion protruding further radially inwardly than inner peripheral surfaces to which the bearing sleeves are fixed. An axial fluid path is formed in the spacer portion, and the axial fluid path communicates to flow paths formed by axial grooves of the bearing sleeves.