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:
Apr. 20, 2004
Filed:
Jun. 23, 2000
Applicant:
Inventors:
Izumi Ikeo, Tokyo, JP;
Masatoshi Nakayama, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16C 3/312 ; G11B 1/702 ;
U.S. Cl.
CPC ...
F16C 3/312 ; G11B 1/702 ;
Abstract
A fluid dynamic bearing has a shaft ( ) fitted in a sleeve ( ) for rotation, with a fluid filled therebetween. The shaft ( ) and/or sleeve ( ) is formed with a pattern consisting of grooves ( ) and lands for generating a pressure distribution in the fluid and then covered with a diamond-like carbon film ( ) over the surface of the grooves and the surface of the lands.