Disc centering sleeve for a disc drive

Details Disc centering sleeve for a disc drive Disc centering sleeve for a disc drive

1996-12-17

1998-10-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, G11B 1702

Patent

active

058285180

ABSTRACT:
A disc pack assembly is provided for use within a disc drive having a spindle motor assembly rotatable about a central axis, with a spindle hub and a hub flange. A disc centering sleeve of the current invention with an inner raised portions and outer raised portions is placed around the spindle hub. An information storage disc is stacked on the spindle hub and rests on the hub flange. A disc spacer is placed on top of the information storage disc. A disc clamp is used to secure the information storage disc to the spindle hub. The inner raised portions abut against the outer surface of the spindle hub and the outer raised portions abut against the inner surface of the information storage disc and the disc spacer, centering the information storage disc and the disc spacer concentric with the central axis. In specific embodiments, the inner raised portions and the outer raised portions are alternatively positioned along the circumference of the disc centering sleeve and further, the inner raised portions and outer raised portions are alternatively positioned equidistant from each other.

REFERENCES:
patent: 5367418 (1994-11-01), Chessman et al.
patent: 5436775 (1995-07-01), Ishimatsu

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