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. 29, 2000
Filed:
Sep. 22, 1997
Applicant:
Inventors:
Robert Michael Pelstring, Santa Cruz, CA (US);
John Charles Dunfield, Santa Cruz, CA (US);
Assignee:
Seagate Technology, Inc., Scotts Valley, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277410 ; 277409 ;
Abstract
A motor is disclosed which includes a shaft and a hub rotating relative to one another and defining a bore therebetween. Also disclosed is a magnetic fluid seal which includes pole pieces supported from the hub, the pole pieces extend toward the shaft. The pole pieces sandwich a non-conducting magnet in a space between the pole pieces. In addition, a contacting process is supported from one of the pole pieces for making electrical contact with the other pole piece to enhance electrical conductivity between the hub and shaft.