Abrading – Machine – Sandblast
Reexamination Certificate
2006-11-28
2006-11-28
Ackun, Jr., Jacob K. (Department: 3723)
Abrading
Machine
Sandblast
C451S099000
Reexamination Certificate
active
07140954
ABSTRACT:
Abrasive cleaning and decontamination methods and systems are disclosed. The methods and systems use a high pressure liquefied gas, such as carbon dioxide, which produces insignificant quantities of secondary waste. These principles of the invention exploit the properties of the relatively high triple point of CO2in order to first pressurize it to 35,000 to 60,000 PSI from a pressurized liquid. In the pressurized state, such a fluid can be at or above room temperature, allowing for transport over long distances in a flexible high pressure hose. At a point of use, a heat exchanger may subsequently chill the liquid, so that after expansion through a small high pressure orifice, a significant fraction of the liquid is converted to solid phase crystals exiting at high velocity to effectively clean and decontaminate. For more aggressive cleaning, abrasive particles and/or small diameter solid CO2pellets can be entrained into the high pressure CO2slipstream.
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Dixon Joseph E.
Johnson Samuel A.
Ackun Jr. Jacob K.
Holland & Hart LLP
S. A Robotics
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