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:
Apr. 30, 1991
Filed:
Dec. 05, 1989
Applicant:
Inventors:
Takashi Kohno, Ibaraki, JP;
Osami Matsushita, Ibaraki, JP;
Michiaki Ida, Tsuchiura, JP;
Katsuaki Kikuchi, Tsuchiura, JP;
Taro Sonoda, Ibaraki, JP;
Yuzo Yamaguchi, Tsuchiura, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 71 ; 360 9807 ; 360 9904 ; 360 9908 ;
Abstract
This invention relates to a magnetic disk apparatus equipped with magnetic bearings for supporting a spindle without contact by a magnetic attracting or repulsing force. The magnetic disk apparatus prevents occurrence of oscillation of magnetic disks and accomplishes high accuracy positioning.