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:
Jun. 11, 2002
Filed:
Feb. 24, 2000
Applicant:
Inventors:
Norbert S. Parsoneault, Scotts Valley, CA (US);
Donald J. Macleod, Santa Cruz, CA (US);
Assignee:
Seagate Technology, LLC, Scotts Valley, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/206 ;
U.S. Cl.
CPC ...
F16C 3/206 ;
Abstract
The smallest shaft diameter while retaining rigidity is achieved using either ceramic or tungsten carbide. However, to maintain the stiffness of the shaft of the surrounding sleeve and supported therefrom by a hydrodynamic bearing, the gap must also be adjusted and diminished. According to this method, the shaft thickness and bearing gaps are optimized by first setting a ceramic shaft thickness, then modifying the gaps in relation to that thickness.