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. 29, 2003
Filed:
Mar. 28, 1997
Applicant:
Inventors:
Assignee:
Hitachi Global Storage Technologies, Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 1/702 ;
U.S. Cl.
CPC ...
G11B 1/702 ;
Abstract
A motor having reduced deformation due to a temperature change. The motor is an outer ring type motor having a bearing cartridge, which integrates the shaft, ball bearings and sleeve. The outer periphery of the sleeve is attached to the inner periphery of the hub at a bonding region positioned axially between the ball bearing holding portions. The bonding portion includes a stress reducing region. The diameter of the hub within the stress reducing region is not uniform in order to reduce the stress generated between the outer periphery of the sleeve and the inner periphery of the hub due to thermal expansion.