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:
Aug. 13, 2013
Filed:
Mar. 17, 2005
Tatsuya Hayashi, Kuwana, JP;
Tatsuo Kawase, Kuwana, JP;
Kiyotaka Kusunoki, Kuwana, JP;
Isao Komori, Kuwana, JP;
Katsuo Shibahara, Kuwana, JP;
Tatsuya Hayashi, Kuwana, JP;
Tatsuo Kawase, Kuwana, JP;
Kiyotaka Kusunoki, Kuwana, JP;
Isao Komori, Kuwana, JP;
Katsuo Shibahara, Kuwana, JP;
NTN Corporation, Osaka-fu, JP;
Abstract
The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap between a thrust bearing surface including dynamic pressure generating grooves and a smooth thrust receiving surface so as to rotatably support a shaft member in an axial direction. The thrust receiving surface is formed as a flat surface, whereas an inclined plane is provided on the thrust bearing surface so as to provide a reduced portion having a decreasing axial width in a radially outward direction in the thrust bearing gap.