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:
Feb. 25, 2003
Filed:
Apr. 11, 2000
Applicant:
Inventor:
Chen-hsiung Lee, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/206 ;
U.S. Cl.
CPC ...
F16C 3/206 ;
Abstract
There is provided a disk drive motor including a shaft, a thrust plate, a bearing housing positioned about the shaft, and a combination of groove sets on either the shaft or the bearing housing. The asymmetrical grooves are oriented to pump fluid in a specific direction during rotation of the housing around the shaft. Vents are also positioned to allow unwanted gases to escape.