Method and system for withstanding shock in a spindle motor...

Details Method and system for withstanding shock in a spindle motor... Method and system for withstanding shock in a spindle motor...

2003-07-31

2008-08-05

Ridley, Richard W L (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S130000, C384S114000

Reexamination Certificate

active

07407327

ABSTRACT:
A system, method and means is provided for withstanding mechanical shock for use with fluid dynamic bearings. A sealing system is provided that withstands 1000 G shock events. In an aspect, a grooved pumping seal employed between a thrust plate and a shield, a thrust plate having spiral grooves, a fluid recirculation passageway, and a reservoir creates an asymmetric pressure gradient. In an aspect, fluid is retained and air is purged utilizing an enlarged fluid reservoir, axial channels and an angled fill hole. In an aspect, a shaft is attached to a top cover supplying radial stiffness, and an enlarged single-sided thrust plate improves dynamic parallelism.

REFERENCES:
patent: 5533811 (1996-07-01), Polch et al.
patent: 5647672 (1997-07-01), Fukutani
patent: 6315452 (2001-11-01), Titcomb
patent: 6361214 (2002-03-01), Ichiyama
patent: 6364532 (2002-04-01), Yoshikawa et al.
patent: 6655841 (2003-12-01), Heine et al.

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