Data storage apparatus and disk fixing method for preventing the

Details Data storage apparatus and disk fixing method for preventing the Data storage apparatus and disk fixing method for preventing the

1993-10-06

1996-02-06

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, G11B 1708

Patent

active

054900220

ABSTRACT:
A disk drive apparatus comprises a disk for recording data and a drive motor for rotating the disk. The disk has obverse and reverse sides, a center hole, an unlevel portion with an uneven flatness on the obverse and reverse sides, situated around the center hole, and a level portion situated outside the unlevel portion and having level surfaces on the obverse and reverse sides. The disk is mounted on a hub of the motor such that the hub is passed through the center hole. The hub has at its one end a supporting portion facing the level portion of the disk. A disk retainer, having a press portion facing the level portion of the disk, is attached to the other end of the hub so as to press the disk toward the supporting portion.

REFERENCES:
patent: 4764828 (1988-08-01), Gollbach
patent: 4918545 (1990-04-01), Scheffel
patent: 4945432 (1990-07-01), Matsudaira et al.
patent: 5031061 (1991-07-01), Hatch
patent: 5089922 (1992-02-01), LeClair
patent: 5243481 (1993-09-01), Dunckley et al.

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