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:
Nov. 13, 2012
Filed:
May. 25, 2010
Anthony J. Aiello, Santa Cruz, CA (US);
Christopher M. Woldemar, Santa Cruz, CA (US);
Norbert S. Parsoneault, Scotts Valley, CA (US);
Alan L. Grantz, Aptos, CA (US);
Anthony J. Aiello, Santa Cruz, CA (US);
Christopher M. Woldemar, Santa Cruz, CA (US);
Norbert S. Parsoneault, Scotts Valley, CA (US);
Alan L. Grantz, Aptos, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A robust spindle motor is provided having improved shock resistance for fluid containment, as well as enhanced air purging characteristics. In an aspect, axial displacement of relatively rotating components is restricted by utilizing a limiter situated adjacent to a limiter bushing forming an axial limiter gap therebetween. A fluid channel, at least partially diverging, extends from a hydrodynamic bearing to the axial limiter gap, and continues to a region beyond the axial limiter gap. In an aspect, an axially diverging slot is situated adjacent to the axial limiter gap. Power is reduced by reducing viscous drag between relatively rotating components, hydrodynamic bearing length is increased, and higher stiffness of the hydrodynamic bearing is provided. Fluid volume may be increased, thereby offsetting fluid evaporation losses and allowing for the use of lower viscosity lubricants.