Hydrodynamic bearing device, motor, recording disc driving...

Details Hydrodynamic bearing device, motor, recording disc driving... Hydrodynamic bearing device, motor, recording disc driving...

2005-12-21

2010-02-02

Joyce, William C (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S114000

Reexamination Certificate

active

07654742

ABSTRACT:
A hydrodynamic bearing device4comprises a shaft41, a second thrust flange41c, a sleeve42, a radial bearing71, and a thrust bearing73. The second thrust flange41cis fixed near one end of the shaft41. A third cylindrical protrusion42ethat protrudes farther in the axial direction than the second thrust flange is fixed to or integrally machined at one end of the sleeve42. A notch50that communicates between a radial inner space and a radial outer space separated by the third cylindrical protrusion42eis provided to the third cylindrical protrusion42e.

REFERENCES:
patent: 2001-355631 (2001-12-01), None
patent: 2002-31131 (2002-01-01), None
patent: 2005-16672 (2005-01-01), None

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