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:
Dec. 01, 2009
Filed:
May. 12, 2008
Jeffry A. Leblanc, Aptos, CA (US);
Robert A. Nottingham, Santa Cruz, CA (US);
Troy M. Herndon, San Jose, CA (US);
Norbert S. Parsoneault, Scotts Valley, CA (US);
Lynn B. Le, San Jose, CA (US);
Jeffry A. LeBlanc, Aptos, CA (US);
Robert A. Nottingham, Santa Cruz, CA (US);
Troy M. Herndon, San Jose, CA (US);
Norbert S. Parsoneault, Scotts Valley, CA (US);
Lynn B. Le, San Jose, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
In one example, a FDB motor having a top-cover attached, EM biased bearing system is provided. The motor includes a shaft and rotor disposed for relative rotation, and an axial limiter for restricting axial movement of the rotor with respect to the shaft, wherein the axial limiter is wet or lubricated during contact. The limiter is spatially fixed with respect to one of the shaft or the rotor and disposed with an axial end surface opposing a surface portion spatially fixed with respect to the other of the shaft or the rotor to form a gap therebetween. The gap may be filled with a fluid such as bearing lubricant, thereby providing a lubricated or wet contact surface to restrict axial movement of the shaft and rotor. Additionally, one or both surfaces may include a groove or slot to provide circulation of fluid through the gap.