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:
Dec. 04, 2018
Filed:
Dec. 05, 2014
Ntn Corporation, Osaka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
Provided is a fluid dynamic bearing device (), including: a bearing sleeve () made of sintered metal; a rotary member () including a shaft portion () and a hub portion (); and first and second thrust bearing portions (TT) that form thrust bearing gaps respectively on an upper end surface () and a lower end surface () of the bearing sleeve () along with rotation of the rotary member (). At least an outer peripheral surface of the bearing sleeve () is subjected to pore sealing treatment. A sealing gap (S) for retaining an oil surface of lubricating oil is made along a tapered outer peripheral surface () of the bearing sleeve (). A lid member () having a bottomed cylindrical shape being fixed to an outer periphery of a lower end of the bearing sleeve ().