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. 14, 2009
Filed:
Aug. 22, 2006
Anthony J. Aiello, Santa Cruz, CA (US);
Alan Lyndon Grantz, Aptos, CA (US);
Klaus D. Kloeppel, Watsonville, CA (US);
Paco Flores, Felton, CA (US);
Anthony J. Aiello, Santa Cruz, CA (US);
Alan Lyndon Grantz, Aptos, CA (US);
Klaus D. Kloeppel, Watsonville, CA (US);
Paco Flores, Felton, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A fluid dynamic bearing motor features a stationary assembly, a rotating assembly supported on the stationary assembly, a fluid dynamic bearing system in a gap between the stationary and rotating assemblies, a radial capillary seal defined proximate a first end of the journal gap, and at least one re-circulation hole extending from the radial capillary seal to a second end of the journal gap. A single thrust shaft end bearing which pressurizes the shaft end to create an axial thrust bearing and drive bubbles in the fluid (where the fluid is a liquid) to the outer diameter of the shaft and into the recirculation path. The journal may be supported for rotation by dual sets of grooves; the dual groove asymmetry in the journal maintains a positive pressure between the journals.