A method for aerosolizing a powdered medicament comprises coupling a powder inlet end of a feed tube with a penetration in a receptacle containing the powder. Powder is drawn upward through the tube and dispersed in a high pressure gas stream flowing past a portion of the feed tube. Apparatus ...http://www.google.de/patents/US5740794?utm_source=gb-gplus-sharePatent US5740794 - Apparatus and methods for dispersing dry powder medicaments
