Patent ID: 7832655

Claim:
A delivery system for generating droplets of liquid active material comprising: a) a liquid reservoir, wherein the liquid reservoir contains a liquid active material; b) an electromechanical transducer, said electromechanical transducer vibrates upon excitation by a power supply; c) a droplet generation element operatively associated with said electromechanical transducer and positioned for contact with said liquid active material, said droplet generation element defines a plurality of perforations, said perforations having a diameter of about 5 microns to about 7 microns; d) a timing mechanism for activating said electromechanical transducer over a first period, and alternatingly deactivating said electromechanical transducer over a second period; wherein first period is between about 50 milliseconds and 120 milliseconds; and wherein the delivery system has a deposition rate of less than about 6 μg and a flow rate of about 30 mg/hr or greater.