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. 04, 1997
Filed:
Jan. 16, 1996
Applicant:
Inventor:
Shinichi Fukuzawa, Kawasaki, JP;
Assignee:
Fujitsu Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 9908 ; 360 9807 ;
Abstract
A magnetic disk drive capable of perfectly preventing dispersion of oil mists of a grease. The magnetic disk drive has a labyrinth seal disposed between a flange and a bushing of a spindle motor, thereby preventing a possible entry of oil mist of the grease applied to bearings into a sealed chamber. The magnetic disk drive further has a magnetic seal disposed between a rotor and a spindle shaft which are located axially opposite to the labyrinth seal relative to a stator. A combination of the labyrinth seal and the magnetic seal ensures improvement of the spindle motor while maintaining a sufficient sealing effect.