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:
Jul. 26, 1994
Filed:
Apr. 06, 1993
Ernst W Ridinger, Soquel, CA (US);
Ronald F Fasano, Saratoga, CA (US);
Seagate Technology, Inc., Scotts Valley, CA (US);
Abstract
A shim mechanism interposed between the hub of a spindle motor, used to mount and rotate discs in a disc drive data storage device, and the disc clamp used to secure the discs to the hub, the shim serving to evenly distribute the clamping force applied to the disc clamp by a plurality of screws equally spaced about the periphery of the disc clamp. The shim includes alignment means for centering the shim relative to the disc clamp and spindle motor hub, and a plurality of radially extending arms, equal in number to the number of screws fastening the disc clamp to the spindle motor hub. The radially extending arms are centered between adjacent screws, and have a width selected to divide the angular displacement between adjacent screws into thirds. The thickness of the shim is selected to evenly distribute the clamping force of the screws about the circumference of the disc clamp.