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:
Jan. 09, 2001
Filed:
Mar. 27, 1998
Applicant:
Inventors:
Ikunori Sakatani, Fujisawa, JP;
Katsuhiko Tanaka, Fujisawa, JP;
Hiromitsu Muraki, Fujisawa, JP;
Etsuo Maeda, Fujisawa, JP;
Hideo Okano, Fujisawa, JP;
Kazuhiro Uemura, Fujisawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 1/702 ;
U.S. Cl.
CPC ...
G11B 1/702 ;
Abstract
A disc drive device includes a rotational assembly which is adapted to mount a disc thereon and is rotatably driven by a motor. The rotational assembly is rotatably supported on a support assembly by a radial hydrodynamic fluid bearing and a thrust bearing. An axial load is applied to the thrust bearing by a magnetic attractive force of up to 30N and is greater than a dead weight of the rotational assembly.