| 摘要 |
A method for dispensing cryogenic substances including: predisposing a pressurized container for a cryogenic substance which includes a valve active at the opening and regulating an emission of the cryogenic substance, predisposing a coupling element stably constrained to the container, predisposing an activating element engaged to the coupling element in such a way that it is interposed between the container and the activating element. There may be: a dispensing step in which the activating element is pressed nearingly to the container to bring the valve of the container into a passage condition to enable exit of the cryogenic substance, a safety step in which the activating element is stably blocked to the coupling element, an intermediate step in which the activating element is mobile relatively by rotation with respect to the blocking element to allow passage from the dispensing step to the safety step and vice versa, an unblocking step including elastic deformation of a part of the activating element which enables passage between the safety step and the intermediate step. |
