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:
Oct. 05, 2004
Filed:
Jun. 28, 2002
Hans Leuthold, Santa Cruz, CA (US);
Michael D. Kennedy, Boulder Creek, CA (US);
Alan Lyndon Grantz, Aptos, CA (US);
Susan Immisch, Scotts Valley, CA (US);
Norbert Steve Parsoneault, Scotts Valley, CA (US);
Mohamed Mizanur Rahman, San Jose, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A bearing system in which an axially stiff narrow gap fluid dynamic gas bearing is preloaded by an axially less stiff larger gap fluid dynamic bearing. As an example two fluid dynamic bearings are provided spaced apart along a shaft, one of the bearings comprising a fluid dynamic bearing, the other comprising an air bearing. The fluid dynamic bearing has a larger gap, while the air bearing has a relatively small gap. The overall working surface area of the air bearing may be twice as much or more than the working surface area of the fluid bearing.