Patent ID: 8714156

Claim:
A controllable mechanical ventilator wherein said ventilator comprises: a gas input connected to a gas reservoir; an inhalation conduit connected to said gas reservoir for receiving gas and directing it to a patient interface; a flow control valve operable to control the flow of gas from the inhalation conduit to an air entrainment area, wherein said air entrainment area is connected, via a first conduit and a second conduit, to a port for receiving atmospheric air; the patient interface connected to said air entrainment area by a conduit; and a gas control valve, wherein said gas control valve is configured to close by a movement of a diaphragm actuator, a third valve and diaphragm, wherein said diaphragm actuator inflates in response to air flowing along a third conduit, wherein said third valve opens in response to the inflation of said diaphragm actuator, and wherein the opening of said valve causes air to flow in a fourth conduit which causes said at least one diaphragm to inflate which inflates in response to an increased pressure state and actuate said gas control valve.