Spindle motor

Details Spindle motor Spindle motor

2006-12-14

2009-12-01

Hannon, Thomas R (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S100000

Reexamination Certificate

active

07625125

ABSTRACT:
The invention relates to a spindle motor having a fluid dynamic bearing system used particularly for driving the storage disks of hard disk drives, having a baseplate, a stationary bearing bush disposed in an opening in the baseplate, a shaft rotatably supported in an axial bore in the bearing bush by means of the fluid dynamic bearing system, a hub connected to the shaft, and an electromagnetic drive system. In order to increase the stiffness of the motor system, according to the invention the bearing bush is provided with a flange that is fixed in the opening in the baseplate and whose outside diameter is distinctly larger than the outside diameter of the bearing bush. Instead of a flange at the outer diameter of the bearing bush there can be provided a sleeve at the base plate which receives the bearing bush at least partly.

REFERENCES:
patent: 6980394 (2005-12-01), Inoue et al.
patent: 2003/0099061 (2003-05-01), Bahirat et al.
patent: 2004/0056547 (2004-03-01), Kull et al.
patent: 2006/0017341 (2006-01-01), Hahn et al.
patent: 2006/0133705 (2006-06-01), Nakamiya et al.
patent: 10239650 (2004-03-01), None

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