Dynamic pressure bearing

Details Dynamic pressure bearing Dynamic pressure bearing

2005-12-13

2005-12-13

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S912000

Reexamination Certificate

active

06974257

ABSTRACT:
A dynamic pressure bearing is provided in which required performances such as corrosion resistance and wear resistance in the use of a hard disk drive or the like are realized without application of any coating such as Ni plating that easily causes a failure, thereby exhibiting stable performances for a long time with a high production yield. As solving means for the above, the material of a sleeve is set to a copper alloy which contains a brass composed essentially of copper (Cu) and zinc (Zn), and silicon (Si), and which does not contain a low-melting soft metal component. A hard phase consisting of a compound of brass and silicon, and a soft phase consisting of brass are mixedly present in a matrix form. According to the configuration, the free-cutting property, the wear resistance, and the corrosion resistance are improved, and a coating by hard Ni plating or the like is not required. Since a low-melting soft metal component is not contained, a working fluid is prevented from being deteriorated.

REFERENCES:
patent: 6010246 (2000-01-01), Gomyo et al.
patent: 6206572 (2001-03-01), Kobayashi et al.
patent: 04-046218 (1992-02-01), None
patent: 09-177767 (1997-07-01), None
patent: 11-223214 (1999-08-01), None

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