Aircrew breathing gas regulators

Surgery – Respiratory method or device – Including body or head supported means covering user's scalp

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Details

12820429, 12820524, 12820423, 12820426, 600 20, B64D 1000

Patent

active

052479269

ABSTRACT:
A breathing gas regulator for regulating delivery of breathing gas to an aircrew member wearing a liquid filled G-suit includes a relay valve having a diaphragm mounted valve plate for sensing G-suit hydrostatic pressure. A bleed of breathing gas is supplied to the relay valve by way of a pneumatic link and is vented to ambient through a vent outlet. As G-suit hydrostatic pressure rises due to increasing G-load the valve plate moves towards closing the vent outlet. Above a predetermined G-load, with the vent outlet closed, a pneumatic signal is generated in the pneumatic link and is applied to an end face of a valve controlling outflow from a breathing-pressure control chamber so that pressure in the control chamber increases to set a breathing gas pressure at the regulator outlet appropriate to positive pressure breathing. The regulator provides a low risk solution to interface with a liquid filled G-suit because in the event of leakage of liquid into the relay valve the liquid is able to bleed to ambient through the vent outlet.

REFERENCES:
patent: 2228115 (1941-01-01), Holste
patent: 2335474 (1943-11-01), Beall
patent: 3089482 (1963-05-01), Gray
patent: 3137290 (1964-06-01), Gongwer
patent: 3528414 (1970-09-01), Schaeller
patent: 3628531 (1971-12-01), Harris
patent: 4546491 (1985-10-01), Beaussant
patent: 4858606 (1989-08-01), Hamlin
patent: 4906990 (1990-03-01), Robinson
patent: 5007893 (1991-04-01), Row
patent: 5127896 (1992-07-01), DeGaston

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