Aircraft aircrew life support apparatus

Details Aircraft aircrew life support apparatus Aircraft aircrew life support apparatus

A - Human Necessities

62

B

137/1.54

A62B 9/02 (2006.01) B64D 10/00 (2006.01)

Patent

CA 2025620

Aircraft aircrew life support apparatus has a G-protection garment inflation pressure control valve disposed in a common body with a breathing demand regulator. Inflation pressure output by the garment inflation pressure control valve is ducted within the body to be directly applied as an operating force to a valve controlling outflow from a breathing-pressure control chamber of the regulator whereby positive pressure breathing obtains in the presence of G-load. The garment inflation pressure control valve comprises a pressure balanced valve adapted to be displaced against the bias of a spring in an opening direction by a pneumatic actuator. The pneumatic actuator is controlled by signals from an accelerometer sensing G-load for inflation of the garment when the aircrew member is subject to high G-load (typically in excess of 2G) and by signals from a cabin pressure sensor for inflation of the garment if the aircrew member is exposed to high altitude (typically in excess of 12000 metres). The pneumatic actuator is subject to feedback control responding to garment inflation pressure.

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