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:
Mar. 16, 1993
Filed:
Jun. 27, 1991
Applicant:
Inventor:
Yoshiki Sakurai, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 9908 ;
Abstract
A hard disk drive includes a housing which has a bottom wall and a cover facing each other. A stator for generating an alernating magnetic field is attached to the bottom wall. First and second bearings are provided on the stator and the cover, respectively, and a rotating shaft is rotatably supported by the bearings. A rotor formed of a magnetic material is fixed to the rotating shaft and has first and second surfaces facing the stator and the cover. A ring-shaped magnet is fixed to the first surface of the rotor to face the stator, and a magnetic disk is mounted on the second surface of the rotor.