Patent ID: 6983748

Claim:
A device for dispensing powdered medicament by inhalation, comprising an air inlet passage, a transition passage connected to the air inlet passage, said transition passage comprising a holding portion for a dose of powdered medicament and a means for creating a region of reduced air velocity, a converging passage connected to the transition passage, the converging passage comprising an end that forms a throat, a diverging section connected to the throat, and an air outlet passage connected to the diverging section, wherein the throat, the air inlet passage, the transition passage and the outlet passage each define a cross-sectional area that includes a minimum cross-sectional area, and wherein the cross-sectional area of the throat is smaller than the minimum cross-sectional area of the air inlet passage, the transition passage and the outlet passage, wherein a dose of powdered medicament can be aerosolized from the holding portion by way of an air stream produced by inhalation.