A breathing system for smoke diving and the like

Details A breathing system for smoke diving and the like A breathing system for smoke diving and the like

A - Human Necessities

62

B

A62B 7/04 (2006.01) A62B 7/10 (2006.01) A62B 9/02 (2006.01) B63C 11/24 (2006.01)

Patent

CA 2079784

A closed or semi-closed breathing system for smoke diving and the like includes a pneumatically controlled breathing bag communicating in a circulation circuit with a breathing mouthpiece or breathing mask for a user, and with an absorption means for exhaled CO2, a pneumatic actuator arranged for alternating expansion and contraction of the breathing bag in accordance with the breathing pattern of the user, and a pressurized gas source coupled to the breathing bag to supplement the breathing gas therein. The system includes a mode regulator arranged to control the actuator's actuation of the breathing bag while simultaneously maintaining an overpressure in the breathing mask in relation to the surroundings, and a dosing means for the supply of a metered gas quantity to the breathing bag in dependence on its degree of filling.

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