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:
Aug. 17, 1999
Filed:
May. 29, 1997
Eduardo Gatmaitan Canlas, San Jose, CA (US);
Ambrish Misra, Milpitas, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A ring shaped-disk clamp for clamping a disk stack to a spindle motor. The ring-shaped disk clamp is referred to as a shrink-fit disk clamp and must be expanded by heating prior to being inserted onto the hub of a spindle motor. Once inserted onto the hub of the spindle motor, an external axial load is applied to the disk clamp. As the disk clamp cools while applying the external load, the clamp contracts and provides a gripping force on the hub of the spindle motor. Subsequently, the external load is removed. The ring-shaped disk clamp includes a top surface, a bottom surface for contacting the disk stack, and an inner peripheral surface for contacting the hub. The inner peripheral surface contacts the hub at a hub contact area that is optimized to provide a localized gripping force on the hub. By optimizing the location of the hub contact area, the disk clamp can provide a relatively high gripping force with a low coefficient of friction between the disk clamp and the hub.