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Supercritical fluid recirculating system for a precision inertial instrument parts cleaner

  • US 5,505,219 A
  • Filed: 11/23/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 11/23/1994
  • Status: Expired due to Fees
First Claim
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1. Precision parts cleaning apparatus using supercritical carbon dioxide fluid for cleaning precision parts, comprising, in combination:

  • a chamber for holding said parts to be cleaned and having a fluid inlet and a fluid outlet;

    a fluid tight recirculator flow system, including said chamber, for directing fluid flow across said parts to be cleaned;

    a source of carbon dioxide gas;

    pressure pump means and heater means connected to the source to change the gas to supercritical fluid and introduce the fluid to the recirculator flow system for movement by said system;

    a recirculating cylinder having a first fluid port and a second fluid port connected in said flow system;

    a piston in said cylinder;

    a driving member connected to said piston;

    a pneumatic motor for moving the driving member and said piston back and forth;

    one way valves in said fluid flow system to insure that fluid is driven from the cylinder ports through the chamber unidirectionally to clean said parts, and back to the cylinder ports; and

    ,a filter connected in the fluid flow system upstream of the chamber.

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