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. 06, 2002
Filed:
Oct. 25, 1999
Applicant:
Inventors:
Kaoru Murabe, Itami, JP;
Osamu Komura, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/206 ;
U.S. Cl.
CPC ...
F16C 3/206 ;
Abstract
A hydrodynamic gas bearing structure includes a columnar shaft body ( ) and a hollow cylindrical bearing body ( ) arranged opposing the shaft body ( ) with a space ( ) maintained in the radial direction therebetween. In a cross section perpendicular to the central axis of the shaft body ( ) and the bearing body ( ), either the shaft body ( ) or the bearing body ( ) has a convex polygonal shape with at least ten vertexes. Accordingly, a hydrodynamic gas bearing structure can be obtained in which whirl can be suppressed even at a high speed rotation of 20,000 rpm or higher and run out associated with the rotation can be suppressed.