A metered dose inhaler for dispensing a fluid medicament as droplets of small mean particle size without the use of pressurized gas or liquefied propellants. A liquid drug is contained in a fluid reservoir, and metered quantities of the drug are successively presented into a reduced cross-section pressure...http://www.google.es/patents/US5497944?utm_source=gb-gplus-sharePatente US5497944 - Atomising devices and methods
