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, 2012
Filed:
Mar. 22, 2007
Masaharu Hori, Kuwana, JP;
Masaaki Toda, Kuwana, JP;
Kenji Hibi, Kuwana, JP;
Tetsuya Yamamoto, Kuwana, JP;
Masaharu Hori, Kuwana, JP;
Masaaki Toda, Kuwana, JP;
Kenji Hibi, Kuwana, JP;
Tetsuya Yamamoto, Kuwana, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
A fluid dynamic bearing device includes a bearing sleeve including a radial bearing surface, a shaft member to be inserted to an inner circumference of the bearing member, and a radial bearing part for non-contact supporting the shaft member in a radial direction by a dynamic pressure action of a fluid generated in a radial bearing gap between the radial bearing surface of the bearing member and an outer circumferential surface of the shaft member. Additionally, a plurality of bearing sleeves are axially arranged, and each bearing sleeve is formed having different axial length with respect to one another.