Patent ID: 8596263

Claim:
A nebulizer comprising: a. an internal volume comprising an upper chamber and a lower chamber; b. an inhalation port in fluid communication with said internal volume and providing means for conduction of aerosol and gas from said internal volume to a patient; c. an liquid reservoir within said lower chamber; d. a gas inlet port adapted to receive pressurized gas and deliver it to said internal volume; e. a ejection nozzle in fluid communication with both of said gas inlet port and said liquid reservoir and which produces a medicament nebula when pressurized gas and liquid medicament are provided; f. an impingement shield which is capable of oscillating from a first position to a second position proximal to said ejection nozzle; wherein said impingement shield in said first position allows for said medicament nebula to impact upon said impingement shield so that an increased fraction of the liquid medicament returns to said liquid reservoir in said lower chamber; Wherein said impingement shield in said second position allows an increased fraction of said medicament nebula of aerosolized liquid medicament into said upper chamber; Whereupon respiration by said patient causes said impingement shield to oscillate from said first position during a non-inhalation event to said second position during an inhalation event.