Provided is a high frequency oscillating ventilator comprising a housingassembly, a linear actuator, a linear coil, a piston mounted on a pushrod, adiaphragm dividing a housing into a first and second side and having anopening formed on the second side that is fluidly connected to the patient'sairway for delivering gas thereto. The linear actuator is fixedly mounted tothe housing assembly and has a linear coil coaxially disposed therewithin. Apushrod supports the linear coil on the linear actuator to allow relativeaxially sliding therebetween. The piston is directly mounted to the diaphragmsuch that reciprocation thereof as effectuated by the linear coil cooperatingwith the linear actuator alternately produces positive and negative pressurewaves in the gas in the patient's airway.
