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:
Mar. 10, 1998
Filed:
Nov. 15, 1996
James H Bodmer, Longmont, CO (US);
Mark A Diel, Boulder, CO (US);
Forrest D Titcomb, Colorado Springs, CO (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
An in-spindle axial-field motor assembly for a disk storage system includes a stationary baseplate and a cover plate secured to the base to form a housing. Disposed about the cover are cylindrical coils which form a motor stator. The motor assembly includes a rotor having inner and outer hubs disposed within the housing. The inner hub is rotatably mounted and supported by a bearing assembly. The outer hub supports an annular, rigid disk which provides a recording medium for storage of information. An axially-magnetized magnet is disposed between the inner and outer hub with the rotor being positioned between the cover and baseplate such that the net axial force acting on the rotor is minimized during motor operation. Ferromagnetic poles are positioned in the center of each coil to enhance the motor's torque generation capability while implementing an axially force-balanced design.