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. 21, 1989
Filed:
Jun. 26, 1986
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 9808 ; 360133 ;
Abstract
Disclosed herein is a disc driving device comprising a base having a fixed substrate and a cylindrical retaining portion integrally formed with the substrate, a rotating shaft rotatably supported to the retaining portion a rotatable hub fixed to the rotating shaft and surrounding the retaining portion, the rotatable hub being provided with an information recording disc at an outer circumference thereof, a driving means for applying a rotational force to the hub, and a reinforcing member provided in the substrate and the retaining portion of the base, the reinforcing member being made of materials having rididity higher than that of the substrate and the retaining portion.