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(11) | EP 1 992 450 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Cleaning-and-deoxidize machine the inside of tank by abrasion |
| (57) The machine is useful to clean and deoxidize by abrasion the inside of metallic containers
such as: cylinder for pressure gas storing, diving tanks, fire extinguishers, fuel
containers; in general solid of revolution in particular of cylindrical form. The objective is reached by inserting some abrasive material within the cylinder hard enough to remove rust from the inner part but not damage the tank. Through the rotation applied to the tank along his axis, the abrasive material act by hitting and scraping on the inner surface of the tank. |