Patent ID: 7793680

Claim:
An electromechanical regulator for regulating passenger oxygen for aircraft, comprising: a supply inlet chamber; an outlet chamber; an oxygen supply inlet port for receiving oxygen from a source of oxygen, said oxygen supply inlet port being connected in fluid communication with said supply inlet chamber; an oxygen outlet port connected to said outlet chamber; a balanced valve controlling fluid communication between said supply inlet chamber and said outlet chamber, and a valve member moveable between a valve closed position and a valve open position, said valve member being biased to the valve closed position; an electronic valve portion operative to control movement of said valve member between said open and closed positions responsive to sensed cabin pressure in the aircraft and sensed output pressure in said oxygen outlet port; and a mechanical valve portion including a supply pressure sensing chamber, said mechanical valve portion being operative to control movement of said valve member between said open and closed positions responsive to pressure in said supply pressure sensing chamber and pressure in said outlet chamber.