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. 26, 1996
Filed:
Jun. 06, 1995
John C Dunfield, Santa Cruz, CA (US);
Gunter K Heine, Aptos, CA (US);
Kamran Oveyssi, Aptos, CA (US);
Marcel Jufer, Morges, CH;
Seagate Technology, Inc., Scotts Valley, CA (US);
Abstract
An 'ironless' bearing spindle motor for rotating at least one disc about a central axis in a data storage device comprises a housing, a stationary member, a hub, and a stator. A rotor magnet is attached to the hub. A bearing interconnects the hub with the stationary member such that the hub and rotor magnet are rotatable about the central axis. The stator is coaxial with the hub and includes an ironless stator winding. The ironless stator winding minimizes low-harmonic acoustic vibration peaks in the spindle motor, resulting in a spindle motor having a very quiet operation.