Fluid dynamic pressure bearing and motor and magnetic disk appar

Details Fluid dynamic pressure bearing and motor and magnetic disk appar Fluid dynamic pressure bearing and motor and magnetic disk appar

1996-03-20

1998-08-11

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384124, F16C 3372

Patent

active

057917841

ABSTRACT:
A fluid dynamic pressure bearing has a shaft member, a sleeve member which is relatively rotatable to this shaft member and radial and thrust fluid dynamic pressure bearings. A lubricating oil retaining channel is provided to retain lubricating oil by the capillarity, a part of the retaining channel is open to the atmosphere and the other part is communicated with the fluid dynamic pressure bearings. The retaining channel can be formed on the shaft member. Further, a fluid dynamic pressure bearing in such the construction is favorably used in a motor and a disk driving apparatus.

REFERENCES:
patent: 4274684 (1981-06-01), Richfield
patent: 4596474 (1986-06-01), Van Roemburg
patent: 5457588 (1995-10-01), Hattori et al.
patent: 5524986 (1996-06-01), Leuthold et al.
patent: 5558445 (1996-09-01), Chen et al.
patent: 5577842 (1996-11-01), Parsoneault et al.

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