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. 06, 1991
Filed:
Jan. 31, 1989
Gerald M Vettel, Pine Island, MN (US);
James M Rigotti, Rochester, MN (US);
Lyle R Tufty, Elgin, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A disk drive within the dimensional confines of a form factor can optimize volumetric density by using the full height dimension to house disks, but must thereafter utilize the remaining space for electrical components. The structure shown uses a stack of parallel cards with an interface card on the rear end wall to provide the principal drive control and data circuits exterior of the head-disk assembly (HDA). The motor driver circuitry is mounted on a flat flexible cable and is secured to the front wall at the opposite end of the drive in heat transfer relation. The heat generating motor drive circuits are physically isolated from the data/control circuits by the frame and HDA while some of the printed circuit cards are secured to the frame in a manner that enhances rigidity; the allocation of modules to the cards anticipates flow of data and control signals to minimize the number of connections and signal delays that impair performance.