CO.sub.2 cleaning system and method

Abrading – Abrading process – Utilizing fluent abradant

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451 40, B24B 100, B24C 100

Patent

active

059445815

ABSTRACT:
An apparatus is provided for cleaning a workpiece with solid CO.sub.2 particles. A flow channel member includes a flow channel therein having an exhaust nozzle at a distal end thereof. A source of pressurized air is provided in selective fluid communication with the flow channel. A phase separator includes first and second portions, with the first portion being in selective fluid communication with the flow channel. A source of liquid CO.sub.2 is provided in selective fluid communication with the phase separator. A liquid flow line includes first and second ends, with the first end being in fluid communication with the second portion of the phase separator, and the second end includes an injector nozzle positioned with the flow channel. The phase separator is operative to separate CO.sub.2 vapor from the liquid CO.sub.2 such that the vapor travels to the first portion for selective communication with the flow channel and the liquid remains in the second portion for injection through the injector nozzle.

REFERENCES:
patent: 4962891 (1990-10-01), Layden
patent: 5405283 (1995-04-01), Goenka
patent: 5514024 (1996-05-01), Goenka
patent: 5545073 (1996-08-01), Kneisel et al.
patent: 5616067 (1997-04-01), Goenka
patent: 5651834 (1997-07-01), Jon et al.

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