Abstract: An improved aerosol delivery system utilizes a pair of horizontally-extending passageways terminating in common opposed ends, the first end being mouthpiece-adjustable, the second end being coupled to the atmosphere. A dual action valve, utilizing a single diaphragm element, provides for opposed one-way air flow through the passageways. A nebulizer is mounted transversely through the passageways, and outputs into the passageway allowing inspiratory flow to the user. A combination adjustment knob/fill port is located at the top of the nebulizer, which extends upwardly above the passageways. The knob is coupled to a valve which meters the liquid to be aspirated which may be aligned with an aperture in the top of the nebulizer for filling purposes. During normal use the apertures are out of alignment, closing the fill port.

Abstract: A nebulizer manifold has upper and lower, vertically juxtaposed, chambers which have respective check valves enabling the ingress only and the egress only of air from the associated ends of the respective chambers. A nebulizer injects its mist output into the fluid flow in the chamber permitting only the ingress of fresh air past a check valve, to create medicated air for inhaling by a patient. The other chamber receives exhaled air and allows it to flow outwards away from the patient and to suitable biological filters. The nebulizer provides for aspiration of a liquid to a movable plate orifice to allow a fluid jet stream to entrain the liquid and then strike a boss movable with the plate to form a mist. Control of the rate at which medication is being received is effected by moving the orifice plate to alter the amount of aspirated liquid supplied to the jet stream.