Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Disk record
Reissue Patent
1996-07-19
2001-11-27
Freay, Charles G. (Department: 3746)
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Disk record
C360S099080, C369S269000
Reissue Patent
active
RE037455
ABSTRACT:
BACKGROUND OF THE INVENTION
The application relates to a storage disk direct drive including a motor and a bearing arrangement for rotatably supporting a hub that carries storage disks. In arrangements of this kind, as a result of the extreme accuracy required as a result of the increasingly small size of the storage disks of 2.5 to 1.8 or even 1.3 inches in diameter (1 inch=25.4 mm), it is difficult to observe the extreme tolerances and to meet the specific quality requirements which must be achieved in these motors. These requirements of errors relate to non-repeatable run out or NRR. In addition, the influence of temperature deviations must be compensated for. Furthermore, a specific load-carrying capacity must be guaranteed for the bearing arrangement and certain resonance frequencies must be avoided.
Therefore, the object of the invention is to design a massproducible subminiature motor by means of which the abovementioned properties are additionally obtained.
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Hermann Michael
Muller Uwe
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Freay Charles G.
Papst Licensing GmbH
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