Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1996-05-07
1999-06-29
Renner, Craig A.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9808, 369270, G11B 2303, G11B 17038
Patent
active
059176776
ABSTRACT:
A disk drive motor spindle hub rotatable about a central shaft has a ceramic hub flange attached to a cylindrical hub portion. The ceramic hub flange has a peripherally raised area on which a first disc rests. Additional discs and spacers are alternatively stacked on top of the first disc. The spacers are made of ceramic material with an inner relieved portion. A ceramic clamp washer with peripherally raised area and an inner relieved portion is stacked on top of the first disc. A ceramic clamp washer with a peripherally raised area and an inner relieved portion and a clamp spring in cooperation with the hub flange apply force to hold the first disc and additional discs in place. The clamp force is applied away from the inner diameter of the discs while portions near the inner diameter of the discs are isolated from the hub flange, spacer and the clamp washer. A conductive centering sleeve exerts a radial force and connects the first disc and additional discs to the hub portion positioning them concentric and providing a conductive path to ground.
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Krum Richard Gene
Moir Michael Bruce
Heller III Edward P.
Minisandram Raghunath S.
Renner Craig A.
Seagate Technology Inc.
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