Disk drive spindle motor having a cavity defined by one of...

Details Disk drive spindle motor having a cavity defined by one of... Disk drive spindle motor having a cavity defined by one of...

2005-01-11

2008-10-14

Heinz, A. J. (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C360S099080

Reexamination Certificate

active

07436625

ABSTRACT:
A spindle motor includes a shaft defining a longitudinal axis, a hub, a bearing assembly disposed between the hub and the shaft for allowing the hub to rotate, and a stator. The stator includes an inner diameter, an outer diameter, a stator tooth having a distal end, and a coil wound around the stator tooth. The stator tooth has a lower surface extending between the coil and the distal end of the stator tooth. The spindle motor includes a stator support structure supporting one of the inner and outer diameters, the stator support structure having an upper surface facing the lower surface, wherein at least one of the upper surface of the stator support structure and the lower surface of the stator tooth defines a cavity.

REFERENCES:
patent: 4965476 (1990-10-01), Lin
patent: 6104570 (2000-08-01), Pelstring
patent: 6455961 (2002-09-01), Higuchi
patent: 6608734 (2003-08-01), Herndon et al.
patent: 6700241 (2004-03-01), Horng et al.
patent: 7265939 (2007-09-01), Kuwajima et al.
patent: 2002/0006012 (2002-01-01), Yoshikawa et al.

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