DEVICE FOR EMERGENCY SUPPLY OF AIR TO DIVER Russian patent published in 1997 - IPC

FIELD: diving. SUBSTANCE: device for emergency supply of air to diver has compressed air bottles 1 connected with hose feeding the air from external source by means of hose fitted with pneumatic valve; they are connected by means of elbow, T-piece fitted with shut-off valve and coupling with reducer which is connected with demand valve by means of hose. Coupling is provided with stepped nipple whose larger step fays to inner surface and lesser step forms circular passage together with it which is engageable with shut-off valve. Reducer is additionally provided with two low-pressure passages, spare pipe union and pipe union connected with hose. Coupling has central branch pipe on which elbow fitted with reducer is mounted. EFFECT: enhanced reliability. 3 cl, 5 dwg