Fluid dynamic bearing and magnetic disk apparatus

Details Fluid dynamic bearing and magnetic disk apparatus Fluid dynamic bearing and magnetic disk apparatus

2006-03-21

2006-03-21

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S476000, C384S107000

Reexamination Certificate

active

07014366

ABSTRACT:
In the present invention, in order to provide a fluid dynamic bearing, having heat resistance, wherein the electrical charging on a rotation portion is prevented and the torque loss caused by a lubricant is made lower, an ionic liquid or the like is added to the lubricant filled in the clearance between the opposed faces of a shaft and a sleeve unit as an electrical conductivity imparting agent.

REFERENCES:
patent: 4573807 (1986-03-01), Asada et al.

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