High-speed centrifugal seal for a spindle motor

Details High-speed centrifugal seal for a spindle motor High-speed centrifugal seal for a spindle motor

2007-05-29

2007-05-29

Miller, Brian E. (Department: 2627)

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Record transport with head stationary during transducing

Disk record

C384S107000, C310S06700R

Reexamination Certificate

active

10852983

ABSTRACT:
A robust spindle motor is provided having added shock resistance for fluid containment. In an aspect, a high-speed centrifugal capillary seal contains a fluid reservoir extending between similarly rotatable components. Fluid is recirculated through the motor and substantially around a counterplate. Proper axial positioning of motor components and stiffness is maintained in motors supporting heavy loads such as a disk drive memory system having a weighty disc pack. In an aspect, two separate thrust surfaces provide oppositely directed axial forces acting on motor components. In an aspect, a single thrust plate that is comparatively small is utilized, reducing power consumption. Also, a thrust bearing situated inboard of a capillary seal forms a comparatively small diameter thrust plate gap. The comparatively small diameter thrust plate gap increases efficiency and characteristics including surface flatness, run out and perpendicularity are improved.

REFERENCES:
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patent: 6181039 (2001-01-01), Kennedy et al.
patent: 6655841 (2003-12-01), Heine et al.
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patent: 7133250 (2006-11-01), Herndon et al.
patent: 2004/0008910 (2004-01-01), Oelsch
patent: 2004/0247213 (2004-12-01), Dittmer et al.

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