Abstract: An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port, an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, an actuator for actuating the main exhaust valve and the auxiliary exhaust valve, the actuator including a rotary shaft having a first gear and a second gear, the rotary shaft being operatively connected to the main exhaust valve via the first gear, the rotary shaft being operatively connected to the auxiliary exhaust valve via the second gear, an electric motor operatively connected to the rotary shaft for rotating the rotary shaft.

Abstract: An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port, an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, an actuator for actuating the main exhaust valve and the auxiliary exhaust valve, the actuator including a rotary shaft having a first gear and a second gear, the rotary shaft being operatively connected to the main exhaust valve via the first gear, the rotary shaft being operatively connected to the auxiliary exhaust valve via the second gear, an electric motor operatively connected to the rotary shaft for rotating the rotary shaft.

Abstract: An automatic resuscitation device for administering a breathable gas under pressure to a patient by an operator where all operating controls and alarms are powered by the pressurized gas in a manual override mode, a patient breathing deemed override mode, and an automatic mode. The device uses no power source other than the pressurized gas to drive alarms and the entire control system. The controls include pneumatic valves and pneumatic alarms as follows: a breathing circuit integrity alarm for notifying the operator that an integrity condition has been detected; a power fail alarm for notifying the operator that the source of pressurized gas has a pressure below a selected source input valve; and pressure relief alarm for notifying the operator that the patient's airway is above the selected pressure relief value.