Fluid dynamic-pressure bearing, spindle motor and recording...

Details Fluid dynamic-pressure bearing, spindle motor and recording... Fluid dynamic-pressure bearing, spindle motor and recording...

2008-05-20

2008-05-20

Charles, Marcus (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S107000, C384S112000

Reexamination Certificate

active

11163432

ABSTRACT:
A fluid dynamic-pressure bearing includes a thrust dynamic-pressure bearing between a bearing member and a rotor hub and a tapered sealing portion continuous with the thrust dynamic-pressure bearing and defining a radial gap whose width gradually increases in the axial direction. A neck is formed in a passageway between the thrust dynamic-pressure bearing and a lubricating fluid/air interface maintained in the tapered sealing portion for increasing flow resistance of the lubricating fluid.

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