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:
Jul. 21, 1998
Filed:
Nov. 22, 1995
Applicant:
Inventors:
Hiroyoshi Teshima, Saihaku-gun, JP;
Hironobu Nishida, Yonago, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd, Kadoma, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ; H02K / ; H02K / ;
U.S. Cl.
CPC ...
310 / ; 310 / ; 310156 ; 310168 ;
Abstract
In a thin type flexible disk drive motor, in order to improve undesirable jittering of rotation, an inertia ring of larger diameter than that of the rotor frame is fixed immediately under the rotor. The inertia ring consists of a short cylinder part of the larger diameter to be fixed under the rotor frame and a flange part of the diameter not smaller than that of FG (frequency generation) magnet part. The disk drive motor also has a drive pin engaging assembly that allows a drive pin to be secured within a hub of the flexible disk while stabilizing the drive pin and after disk chucking.