Disc clamp with integrated stiffener for hard disc drives

Details Disc clamp with integrated stiffener for hard disc drives Disc clamp with integrated stiffener for hard disc drives

1995-03-10

1996-06-18

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, G11B 1702

Patent

active

055284345

ABSTRACT:
A disc clamp formed in a circular shape from planar material. The disc clamp includes a central mounting portion having screw holes through which screws are inserted and fastened to matching tapped holes in the hub of the spindle motor. A circular corrugation is formed closely adjacent the outer diameter of the clamp forming a circular contact surface facing in the direction of the uppermost disc in a vertical stack of discs. A stiffening bend is formed at a radius lying between the central mounting portion and the circular corrugation to distribute the clamping force evenly between adjacent pairs of the screws. In a second aspect of the invention, the central mounting portion of the clamp includes a central opening and that part of the central mounting portion between the central opening and the stiffening bend is formed out-of-plane in the direction of the discs so that the central mounting portion will be substantially flattened onto the top of the hub of the spindle motor when the screws are tightened.

REFERENCES:
patent: 4561035 (1985-12-01), McDorman et al.
patent: 4864443 (1989-09-01), Peterson
patent: 5075808 (1991-12-01), Johnson
patent: 5101306 (1992-03-01), Johnson
patent: 5130870 (1992-07-01), Jabbari
patent: 5274517 (1993-12-01), Chen
patent: 5295030 (1994-03-01), Tafreshi
patent: 5333080 (1994-07-01), Ridinger et al.
patent: 5392178 (1995-02-01), Nishio et al.
patent: 5414575 (1995-05-01), Katakura
patent: 5452157 (1995-09-01), Chow et al.
"Load Distributing Disk Clamp"; Research Disclosure, #266; Disclosed Anonymously; Kenneth Mason Publications.

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