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:
Sep. 07, 1999
Filed:
Nov. 18, 1997
Applicant:
Inventor:
Katsunori Sakuragi, Yonago, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ;
U.S. Cl.
CPC ...
310 / ; 310 90 ; 310 85 ; 310 89 ;
Abstract
A brushless motor assembly for a magnetic disc drive device includes a bracket for the support of a fixed shaft carrying a stator core at a lower end thereof. A generally cylindrical hollow hub encircles the fixed shaft and carries a rotor magnet at a location confronting the stator core. The bracket is of a size sufficient to protrude into the hollow of the hub and defines a labyrinth seal between an outer peripheral face thereof and an inner peripheral face of a corresponding portion of the hollow of the hub.