Ultrasonic spraying hand-held device for pharmaceutical cartridges

摘要

A medical ultrasound hand spray apparatus comprises a system of tubes (1), an oscillator (2) and a cartridge (3). The tube tip is oscillated by a piezoelectric oscillator or by electromagnetic excitation. The frequency of the oscillator is varied to achieve resonance. The amplitude is increased by increasing the number of piezoelectric discs. The oscillation system has an upper screw thread and a lower cylinder.