Apparatus for supercritical cleaning
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United States of America Patent
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-
Jun 18, 1996
Issued Date -
N/A
app pub date -
Aug 17, 1994
filing date -
Oct 27, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for precision cleaning with carbon dioxide includes a pressure vessel having a removable cleaning drum with a sanitized work zone. The sanitized work zone is defined by an impermeable drum body having a removable exit filter to ensure that circulating cleaning fluid does not redeposit contaminants on the parts. The carbon dioxide is maintained in liquid form in the storage vessel, raised above its critical temperature by the preheater, pumped into the pressure vessel to achieve critical pressure, circulated through the work zone for a predetermined period of time, and removed through the let-down valve.
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