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. 21, 2014
Filed:
Feb. 24, 2011
Tetsuya Kurimura, Kuwana, JP;
Tetsuya Kurimura, Kuwana, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
A fluid dynamic bearing devicehas a bearing sleeve, a shaft memberwhich is inserted in the inner periphery of the bearing sleeve, a housingwhich is formed by pressing, has the bearing sleevepress-fitted in the inner periphery thereof, and has a stepped sectionwhich engages with the end surface of the bearing sleeve and is located ahead in the direction of press-fitting of the bearing sleeve, a thrust receiverwhich is in contact with and supports an end of the shaft member, and a seal portionwhich prevents oil from leaking from the inside of the housing. A dynamic pressure generating groovefor generating fluid dynamic pressure in a radial bearing gap between the outer peripheral surface of the shaft memberand the inner peripheral surface of the bearing sleeveis formed in the inner peripheral surface of the bearing sleeve