This oscillating construction for an ultrasonic atomizing inhaler includes an oscillation element which is excited to vibrate ultrasonically, and this oscillation element has two adjoining regions which have substantially different vibrational characteristics. Liquid supply is made to one of the regions,...http://www.google.com/patents/US4790479?utm_source=gb-gplus-sharePatent US4790479 - Oscillating construction for an ultrasonic atomizer inhaler
