DEVICE FOR FEEDING COMPRESSED AIR AND EITHER CARBON DIOXIDE OR LIQUEFIED OR SUPERCRITICAL DINITROGEN MONOXIDE INTO A HOSE

摘要

In a feed pipe for feeding compressed air and either carbon dioxide or liquefied or supercritical dinitrogen monoxide, said compressed air and either carbon dioxide or liquefied or supercritical dinitrogen monoxide are supplied from a source of compressed air to the safety unit of a hose, then to a machine, preferably a surface processing machine, via one or more connecting pipes comprising each at least two portions, the liquefied or supercritical gas being fed to at least one first portion of the hose, while elements are provided in the safety unit of the hose to ensure that, in the event that liquified or supercritical gas slowly or suddenly leaks from a first portion of the hose, the corresponding gas supply and possibly the supply of compressed air be interrupted.