Disc centering device for a disc drive

Details Disc centering device for a disc drive Disc centering device for a disc drive

1996-12-17

1998-07-14

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9808, G11B 17022, G11B 17038

Patent

active

057813744

ABSTRACT:
A disc pack assembly comprises a spindle motor assembly rotatable about a central axis. The spindle motor assembly has a spindle hub, which has at least one ring receiving portion. At least one information storage disc is stacked on the spindle hub and a resilient spacer ring is stacked on top of the information storage disc. A second resilient ring is located in the ring receiving portion of the spindle hub and is adjacent to the inner diameter of the information storage disc. A disc clamp is provided to apply an axial force to center and secure the information storage disc to the spindle hub, such that a portion of the axial force compresses the second resilient ring and forces the outer surface of the second resilient ring to apply a radial force to the information storage disc by radial expansion of the second resilient ring, and a portion of the axial force compresses the resilient spacer ring and forces the inner surface of the resilient spacer ring to apply a radial force to the second resilient ring by radial expansion of the resilient spacer ring, forcing the second resilient ring to further apply radial force to the information storage disc.

REFERENCES:
patent: 4945432 (1990-07-01), Matsudaira et al.
patent: 5367418 (1994-11-01), Chessman et al.
patent: 5459627 (1995-10-01), Peter

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