Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1995-07-25
1998-08-25
Thomas, Tom
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9904, 360 9912, G11B 1704, G11B 1708, G11B 1702
Patent
active
057988870
ABSTRACT:
A rotary driving apparatus controls the generation of vibration and noise due to high speed rotation, to realize high accuracy rotation, so that a storage apparatus such as a disk drive can have high speed rotation and improved storing density on its recording medium.
The apparatus includes a fixed shaft for rotatably supporting a rotor, a bearing fitted between the shaft and the rotor, at least two projections projecting from the surface of the shaft, and a stator coil mounted on the projections. The projections absorb stator vibration, and isolate the head, the storage disk and other parts from the stator vibrations. A gap area is formed between the stator coil and the shaft to dampen vibrations created by the stator. The gap may be filled with vibration-absorbing material.
REFERENCES:
patent: 4760299 (1988-07-01), Dickie et al.
patent: 5365388 (1994-11-01), Maughan et al.
patent: 5376850 (1994-12-01), Elsing et al.
patent: 5481144 (1996-01-01), Dunfield et al.
patent: 5504638 (1996-04-01), Kinoshita et al.
Kaneko Hisashi
Yoshida Mitsuaki
Fujitsu Limited
Giordana Adriana
Thomas Tom
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