Patent ID: 7677529

Claim:
An electromechanical valve assembly for regulating and shutting off the flow of a oxygen from a compressed oxygen source in an aircraft, said valve assembly comprising: a valve housing comprising an inlet, an outlet, and a connecting passageway for enabling the flow of oxygen from said inlet to said outlet, said inlet comprising a fitting for sealable connection with said compressed oxygen source; a spring-biased conical poppet disposed in and movable within said passageway; a spring-biased pressure regulating piston engagable with said conical poppet to maintain said poppet in an open position; a push rod engagable with said conical poppet to maintain said poppet in a closed position; and a movable seat disposed in said passageway, and engagable with said conical poppet to regulate gas flow through said passageway, said movable seat being actuated by an electric motor assembly that is effective to move said seat either towards said conical poppet, or away from said poppet and towards said pressure regulating piston; wherein actuation of said electric motor assembly to cause said movable seat to move towards said conical poppet, enabling said poppet to engage said push rod, resulting in closing of said valve assembly and shutting off of said oxygen flow from said compressed oxygen source; and wherein actuation of said electric motor assembly to cause said movable seat to move towards said regulating piston, enabling said poppet to contact said pressure regulating piston, resulting in opening of said valve assembly and regulation of said oxygen flow from said compressed oxygen source by said pressure regulating piston.