DIVER BREATHING APPARATUS Russian patent published in 2008 - IPC B63C11/20 

FIELD: transportation, diving equipment.

SUBSTANCE: diver breathing apparatus incorporates a system of continuous air feed from the water surface via a flexible pipe, a breathing apparatus proper consisting of a casing with air inlet and outlet, a mouth-piece communicating with the said casing space and a system discharging expired air onto the water surface. The aforesaid casing inlet communicates with the said pipe outlet, the casing outlet accommodating a release valve. A diaphragm is arranged in the casing perceiving an ambient pressure and an intake valve arranged at the casing inlet and lever-connected with the said diaphragm for the valve to get opened with diaphragm deflecting inside the casing. The expired air discharge system incorporates another diaphragm arranged in the said casing furnished with the second outlet provided with the second release valve connected by the second lever with the aforesaid diaphragm for the valve to get opened with diaphragm deflecting outside the casing. The said second outlet communicates with the second pipe, its outlet extending above the water surface.

EFFECT: discharge of expired air onto the water surface rules out bubbling during expiration.

1 dwg