Data storage disk clamp apparatus for minimizing disk clamping f

Details Data storage disk clamp apparatus for minimizing disk clamping f Data storage disk clamp apparatus for minimizing disk clamping f

1994-11-29

1997-01-21

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9808, G11B 1702

Patent

active

055964621

ABSTRACT:
A novel disk clamp apparatus to securely mount one or more data storage disks to the hub of a spindle motor using a minimal amount of clamping force and surface area of the data storage disks is disclosed. A plurality of engagement protrusions disposed on the mating surface of the disk clamp preferably penetrate the mating surface of the data storage disk. Corresponding engagement recesses on the mating surface of the data storage disk are formed from penetration of the engagement protrusions or, alternatively, are preformed on the mating surface of the data storage disk. The engagement protrusions may alternatively be disposed on the data storage disk mating surface, while the corresponding engagement recesses are disposed on the clamp mating surface. In another embodiment, interfacial particles are disposed between the mating surfaces of the disk clamp and the data storage disk which penetrate the respective mating surfaces when pressed together. The interfacial particles may be impregnated into a spacer element which is disposed between the disk clamp and data storage disk mating surfaces, and between the mating surfaces of adjacently stacked data storage disks. Upon application of a clamping force, the sharp prominences of the interfacial particles impregnating the spacer penetrate the mating surfaces of the disk clamp and data storage disk.

REFERENCES:
patent: 2146519 (1939-02-01), Zimmerman
patent: 4864443 (1989-09-01), Peterson
patent: 5031062 (1991-07-01), Wood et al.
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patent: 5267106 (1993-11-01), Brue et al.
patent: 5274517 (1993-12-01), Chen
patent: 5389398 (1995-02-01), Suzuki et al.
patent: 5428490 (1995-06-01), Hagen
Herring and Neid--IBM Technical Disclosure Bulletin vol. 17 No. 2, Jul. 1974, pp. 503-504, "Multiple Magnetic Disk Removable Pack".
IBM Technical Disclosure Bulletin, Disk Pack Compliance Clamp, vol. 21, No. 2, Jul. 1978, pp. 802-803.
IBM Technical Disclosure Bulletin, Clamping of Magentic Disk Stack with a Top Ring, vol. 25, No. 3A, Aug. 1982, pp. 1108-1109.

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