Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Patent
1991-11-26
1993-09-28
Millin, V.
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
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.
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patent: 3089482 (1963-05-01), Gray
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patent: 5007893 (1991-04-01), Row
patent: 5127896 (1992-07-01), DeGaston
Millin V.
Normalair-Garrett (Holdings) Limited
Passaniti Sebastiano
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