Etching method for making fluid bearings

Details Etching method for making fluid bearings Etching method for making fluid bearings

2005-06-14

2005-06-14

Ahmed, Shamim (Department: 1765)

Etching a substrate: processes

Forming or treating cylindrical or tubular article having...

C216S041000, C216S083000, C029S898020, C264S219000, C264S269000

Reexamination Certificate

active

06905617

ABSTRACT:
This specification discloses an etching method for making fluid bearings. The invention uses an ejection axis as the mask of the bearing cast. A protection material is inserted into the inner diameter of the fluid bearing, producing a protection pattern. After pulling out the ejection axis, the bearing cast is etched to form a desired oil groove in the inner diameter. Afterwards, the etching solution is washed away and the protection pattern is removed. The invention can be easily integrated with existing manufacturing procedures, achieving the goal of mass production and lowering costs. In addition, the invention can avoid such problems as rough edges as in the prior art. At the same time, the disclosed method makes the radial and stop parts of the fluid bearing, simplifying the manufacturing procedure.

REFERENCES:
patent: 5758421 (1998-06-01), Asada
patent: 5855802 (1999-01-01), Acciai et al.
patent: 6074098 (2000-06-01), Asai et al.
patent: 6537459 (2003-03-01), Dufresne et al.

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