Disk clamp for rigid disk file without radial load

Details Disk clamp for rigid disk file without radial load Disk clamp for rigid disk file without radial load

1988-10-25

1990-04-17

Severin, David J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, 369270, G11B 1702

Patent

active

049185454

ABSTRACT:
A clamp includes an annular member that acts through a spacer ring to clamp a stack of rigid disks in spaced parallel relationship to a hub having a portion supporting the lower end of the stack. The annular member has a plurality of uniformly spaced radial slots to define a plurality of substantially identical tapered leaf springs. Each leaf spring terminates at its wider end in a common solid hoop-shaped rim that overhangs and contacts the spacer ring along a circular line in the same horizontal plane as, and near, the centroid of the cross-sectional area of the rim when the clamp is uncompressed. Upon application of a compressive force in an axial direction concurrently to the small innermost ends of all said leaf springs, the rim pivots at and along said circular line to substantially eliminate radial load transmitted via the spacer ring to the top disk when clamping the stack to the hub. A minimal spring constant results from substantially uniform stress distribution across and along each tapered leaf spring.

REFERENCES:
patent: 3587073 (1971-06-01), Ghose et al.
patent: 4065799 (1977-12-01), Kaczeus
patent: 4672488 (1987-06-01), Wright
patent: 4764828 (1988-08-01), Gollbach
patent: 4791624 (1988-12-01), Stinesen
Pocock, "Bistable Disk Clamp to Apply Axial Force", IBM Technical Disclosure Bulletin, vol. 29, No. 10, Mar. 1987, pp. 4346-4347.
Allen, et al., "Zero Droop Disk Clamping Assembly", IBM Technical Disclosure Bulletin, vol. 26, No. 10B, Mar. 1984, pp. 5444-5446.
Beuch et al., "Spider Collet For Flexible Magnetic Disks", IBM Technical Disclosure Bulletin, vol. 20, No. 6, Nov. 1977, pp. 2376-2377.

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