Dynamic pressure bearing made of porous material

Details Dynamic pressure bearing made of porous material Dynamic pressure bearing made of porous material

1998-04-08

1999-12-14

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384279, 384292, F16C 3206

Patent

active

060008504

ABSTRACT:
The invention provides a dynamic pressure bearing capable of generating enough dynamic pressure even with the use of a porous material. Dynamic pressure grooves at an inner circumferential surface of a sleeve made of porous material are formed by rolling process. Voids of the porous material at a surface of the dynamic pressure grooves are crushed by this rolling process, making the dynamic pressure grooves airtight. Further, the inner circumferential surface at which the dynamic pressure grooves are formed is subject to a sizing process, by which a bearing surface of the sleeve is crushed so that substantially no voids are present.

REFERENCES:
patent: 2855249 (1958-10-01), Gerard
patent: 3169807 (1965-02-01), Abel et al.
patent: 5520038 (1996-05-01), Clark et al.
patent: 5683183 (1997-11-01), Tanaka et al.

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