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:
Jan. 10, 1989
Filed:
Sep. 22, 1987
Micropolis Corporation, Chatsworth, CA (US);
Abstract
A Winchester disk drive assembly includes upper and lower mounting plates and shafts for the main drive motor assembly and for the head positioner firmly connected to both mounting plates. One end of the shafts is mounted to one of the mounting plates by a shouldered washer. A shouldered washer is mounted in a counterbored hole in the adjacent mounting plate and is firmly secured to the adjacent shaft end by a steel screw, with the dimensions of the washer being selected to provide space between the enlarged head portion of the washer, and the counterbore, so that the shaft is entirely stress-free. The space between the inner surface of the enlarged portion of the T-shaped washer and the counterbored recess is then filled with epoxy which bonds the two parts together. The shouldered washer then becomes an essential part of the adjacent mounting plate, and the mounting plate may be removed and separated from the shaft by removing the steel screw. The shouldered washer and the mounting plate may be formed of aluminum or an alloy thereof, and the epoxy may be filled with finely-divided aluminum particles, so that thermal cycling has no adverse effects.