Spindle motor having variably grooved radial and thrust...

Details Spindle motor having variably grooved radial and thrust... Spindle motor having variably grooved radial and thrust...

2006-01-20

2008-12-16

Hannon, Thomas R (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S107000, C384S100000

Reexamination Certificate

active

07465098

ABSTRACT:
A bearing system having variably grooved radial and thrust bearing with reduced groove angle near bearing entry is described. In an embodiment, the bearing system includes a housing. The bearing system also includes a shaft centrally located in the housing. The bearing system additionally includes a rotor portion that is adapted to be rotated about the shaft and contained within the housing. The bearing further includes a variably angled groove disposed on an internal surface of the bearing system. The variably angled groove reduces ingestion of air in the bearing system during operation of the bearing system.

REFERENCES:
patent: 4961122 (1990-10-01), Sakai et al.
patent: 5908247 (1999-06-01), Leuthold et al.
patent: 6108909 (2000-08-01), Cheever et al.
patent: 7090401 (2006-08-01), Rahman et al.
patent: 7125170 (2006-10-01), Kim
patent: 2006/0002640 (2006-01-01), Chen et al.
patent: 2006/0039637 (2006-02-01), Huang
patent: 2006/0133703 (2006-06-01), Engesser et al.

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