The invention utilizes a multiple frequency ultrasound generator driving a multiple frequency harmonic transducer array to improve cleaning and processing effects while eliminating damage to parts being cleaned. An AC switch and circuitry to modify the output of an ultrasound generator in combination...http://www.google.fr/patents/US7211928?utm_source=gb-gplus-shareBrevet US7211928 - Apparatus, circuitry, signals and methods for cleaning and/or processing with sound
Apparatus, circuitry, signals and methods for cleaning and/or processing ...
