Deep diving breathing systems

Details Deep diving breathing systems Deep diving breathing systems

A - Human Necessities

62

B

137/1.5

A62B 7/00 (2006.01) B63C 11/18 (2006.01)

Patent

CA 1165206

ABSTRACT OF THE DISCLOSURE Title:- "Deep Diving Breathing Systems" A deep diving breathing system in which a breathable gas mixture is circulated through a diving helmet by a push-pull pump includes an inlet flow control valve, an outlet gas flow regulator valve, and a bleed valve. The bleed valve operates in response to the pressure of gas flowing from the outlet gas flow regulator valve to bleed gas from a gas supply line upstream of the inlet flow control valve. The system facilitates diving operations from a diving bell at a range of depths and recovery of helium in a helium-oxygen breathing gas mixture.

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