Patent ID: 7617822

Claim:
A breath actuated dry powder inhaler, comprising a plurality of substantially disc shaped air circulation chambers for de-agglomeration of entrained powdered medicament using energy of an inspiratory air stream created by the user, the each of the chambers having a substantially circular or polygonal sidewall extending about a central axis between top and bottom walls of each of the chambers so that a height of each of the chambers is smaller than its diameter, a plurality of air supply channels disposed about a circumference of each of the chambers, which channels extend from joint or separate air inlets and which channels enter each of the chambers substantially tangentially to its sidewall, at least one of the supply channels extending through a powder dose supply region of the inhaler, each of the chambers further comprising an air outlet axially extending from a discharge opening in the center of the top or bottom wall of each of the chambers and connecting to a discharge channel that extends to a mouthpiece, said powder traveling through said dose supply region, then through a plurality of the air supply channels to one of said chambers and exiting through said discharge openings and air outlets, to the discharge channel and to the mouthpiece.