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. 13, 1993
Filed:
Mar. 05, 1992
Applicant:
Inventor:
Tokumon Ogawa, Komagane, JP;
Assignee:
Nagano Nidec Corporation, Nagano, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; G11B / ;
U.S. Cl.
CPC ...
310 90 ; 310 42 ; 360 9908 ;
Abstract
A spindle motor includes a shaft, a hub assembly unit rotatable relative to the shaft, an upper bearing structure and a lower bearing structure both interposed between the shaft and the hub assembly unit, and a stator disposed between the upper and lower bearing structures. The stator, the hub assembly unit, and the upper and lower bearing structures are attached to a specific side of the shaft. The hub assembly unit has an aluminum-made hub and an iron-made yoke, both of which are joined together through a pair of fixing portions. One fixing portion has a relatively strong fitting force, whereas the other fixing portion has a relatively weak fitting force.