Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1993-08-25
1994-03-15
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9702, 360 9807, 360 9908, G11B 1702
Patent
active
052950280
ABSTRACT:
A disk drive assembly includes a disk pack with an axially retractable spindle assembly and a rotary actuator, mounted within a unitary deck and precision aligned by bores through spaced apart upper and lower support walls of the deck. Bushing sleeves, mounted through bearings to opposite ends of a spindle shaft, are aligned and secured within the bores by screws through the support walls and threaded into the bushing sleeves, thus to secure the spindle shaft for rotation relative to the support walls. A cup-shaped hub is fixed to the spindle shaft. A radially outward wall of the hub has upwardly converging flutes that cooperate with openings through annular spacers between adjacent disks on the hub, to provide a purging and cooling air flow. The hub and bushing sleeves have interacting pairs of annular flanges and annular grooves, and the bushing sleeves include extensions adjacent the bearings, to control radially outward passage of air from the center of the spindle assembly toward the region of the disks. Three angularly spaced apart fasteners extend through the hub and into an annular back iron through an annular edge of the back iron, to secure the back iron to the hub. An outer circumferential surface of the back iron and the radially outward wall of the hub are radially spaced apart from one another when the hub and back iron are secured. Three spacers between the back iron edge and hub, one surrounding each fastener, maintain the hub and back iron in axially spaced apart relation.
REFERENCES:
patent: 4672487 (1987-06-01), Brand et al.
patent: 4835637 (1989-05-01), Mach et al.
patent: 5001581 (1991-03-01), Elsasser et al.
patent: 5091809 (1992-02-01), Connors et al.
Seagate Technology Inc.
Tupper Robert S.
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