Low power spindle motor with a fluid dynamic spool bearing

Details Low power spindle motor with a fluid dynamic spool bearing Low power spindle motor with a fluid dynamic spool bearing

2006-03-21

2006-03-21

Tupper, Robert S. (Department: 2652)

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Reexamination Certificate

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07016146

ABSTRACT:
A spindle motor for use in a disk drive including a shaft and a bearing sleeve. The shaft has a larger diameter section and a smaller diameter section with a step formed therebetween. The bearing sleeve has a central cylindrical opening, the shaft being inserted into the central cylindrical opening. A bearing gap is formed between the shaft and the bearing sleeve, the bearing gap being filled with lubricating fluid. A first hydrodynamic thrust bearing is formed in the area of the step. A hydrodynamic radial bearing is formed in the area of the larger diameter section of said shaft.

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