MACHINE FOR SUBACQUE USE, IN PARTICULARS OF THE FORMAL FORMAL TYPE APPROVED WITH A COMMUNICATION DEVICE.

摘要

Mask of the so-called full face type comprising a transparent visor (2), a frame or strapping (3), a seal preferably made of rubber adapted to ensure the watertight seal and suitable straps (4) to fit the mask on the face, such a face part of the mask being associated with a breathing tube (5) that engages on the upper part of the mask and that allows the flow of air to enter into the compartment made between the frame and the visor. The path of the air during the breathing-in phase and that during the breathing-out phase both in the mask and in the tube are different from each other. The tube is made with separate ducts for the air breathed in and out and the inside of the mask being made with two compartments, an upper front one (6) and a lower oronasal one (7), separated by a separating wall, the path inside the mask provides for the air breathed in to be introduced from the tube into the front compartment and then into the oronasal one and the air breathed out from the oronasal compartment travels on a peripheral path of the mask up to the tube. The mask comprises a communication device.