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:
May. 29, 2001
Filed:
Oct. 08, 1996
David John Jennings, Santa Cruz, CA (US);
Hans Leuthold, Santa Cruz, CA (US);
Lakshman Nagarathnam, Capitola, CA (US);
Steve Gonzalez, Davenport, CA (US);
Dean A. Tarrant, San Jose, CA (US);
Gunter Heine, Aptos, CA (US);
Raquib U. Khan, Pleasanton, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A spindle motor is described having a motor stator, a motor rotor, the motor being energized to cause rotation of the rotor supporting a single disc or a stack of discs which is mounted in such a way that the rotating bottom or top (or both) disc surface is closely adjacent to a stationary disc drive casting surface. The squeeze film action in the remaining air gap provides significant damping of the disc vibration. Typical implementation use air gaps of 0.004″-0.006″ for 2½″ drives and 0.006″-0.10″ for 3½″ drives.