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:
Feb. 22, 1994
Filed:
Feb. 01, 1993
Applicant:
Inventors:
Katsuhiko Tanaka, Yamato, JP;
Ikunori Sakatani, Fujisawa, JP;
Takeyuki Yoshiba, Fujisawa, JP;
Shigeru Endo, Fujisawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 905 ; 384107 ;
Abstract
A bearing device comprising a fixed shaft having a first radial bearing surface, a sleeve provided in a fitting relationship with the fixed shaft and having a second radial bearing surface opposed to the first radial bearing surface, the second radial bearing surface having herring-bone grooves thereon to form a radial gas bearing to support the sleeve with respect to the fixed shaft, and the fixed shaft having one end portion forming part of a magnetic thrust bearing of aspirating type to support the sleeve with respect to the fixed shaft.