Claims
- 1. A system for blast cleaning a surface, comprising:
- means for providing a high pressure stream of a cyrogenic substance having a temperature between -320 degrees F. and 150 degrees F.;
- means for storing solid pellets of carbon dioxide;
- means for mixing said solid pellets of carbon dioxide into said high pressure stream; and means for propelling the mixture of solid pellets and high pressure stream towards the surface to be cleaned,
- the high pressure stream of said cyrogenic substance being propelled in a combined liquid and gaseous state.
- 2. A system for blast cleaning a surface, comprising:
- the steps of providing a high pressure stream of a cryogenic substance having a temperature between -320 degrees F. and 150 degrees F.;
- storing said solid pellets of carbon dioxide; mixing said solid pellets of carbon dioxide into said high pressure stream; and
- propelling the mixture of solid pellets and high pressure stream towards the surface to be cleaned, the cyrogenic substance being selected from the group consisting essentially of nitrogen, helium, oxygen and mixtures thereof and the high pressure stream of said substance propelled in a combined liquid and gaseous state.
Parent Case Info
This is a continuation in part of U.S. application Ser. No. 07/589,042 filed Sep. 27, 1990 now U.S. Pat. No. 5,184,427.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
589042 |
Sep 1990 |
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