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. 21, 1998
Filed:
Dec. 30, 1996
Blasius Brezoczky, San Jose, CA (US);
Ian C Fry, Danville, CA (US);
Phase Metrics, San Diego, CA (US);
Abstract
A spindle motor assembly which utilizes a reservoir of electrically conductive fluid to provide a conductive path through the assembly. The spindle motor assembly includes a spindle shaft that is located within a housing and rotated by an internal motor. The end of the spindle shaft is located within the reservoir. The reservoir also is electrically coupled to the housing. The electrically conductive fluid provides a conductive path between the spindle and the housing while minimizing the frictional forces on the spindle. The spindle may be coupled to a chuck that holds a magnetic disk within a disk certifier. The magnetic disk is electrically grounded to the housing through the chuck, the spindle and the electrically conductive fluid.