Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Reexamination Certificate
2005-05-24
2005-05-24
Renner, Craig A. (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
C310S06700R, C310S090000
Reexamination Certificate
active
06898052
ABSTRACT:
A spindle motor for use in a disk drive includes a spindle motor base and a motor shaft. The motor shaft has a central axis. The spindle motor includes a spindle motor hub rotatably coupled to the spindle motor base, the spindle motor hub including a central magnetic metal portion disposed adjacent a distal end of the motor shaft. The spindle motor includes a ball bearing set disposed between and in mechanical communication with the spindle motor hub and the motor shaft for rotatably coupling the spindle motor hub to the spindle motor base. The spindle motor includes a shaft magnetic element attached to the motor shaft at the distal end adjacent the central magnetic metal portion, the shaft magnetic element being sized and configured to apply an attractive magnetic force to the central magnetic metal portion in a direction along the central axis for pre-loading the ball bearing set.
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C. Kim, Esq. Won Tae
Renner Craig A.
Western Digital Technologies Inc.
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