Patent ID: 7740188

Claim:
An apparatus for generating liquid jet pulsations characterized in that it is composed of an acoustic system consisting of an acoustic actuator ( 1 ), connected to an electric power source, said acoustic actuator ( 1 ) comprising an electromechanical transducer ( 10 ) and a cylindrical waveguide ( 11 ) having an emissive area, an acoustic chamber ( 2 ) which internal volume being filled with stationary pressure liquid ( 3 ), wherein a cross-section of the acoustic chamber ( 2 ) exceeds the emissive area of the acoustic actuator ( 1 ) by no more than 20%, said acoustic chamber ( 2 ) including a mechanical amplifier of pulsations ( 4 ) having a conical shape, and a liquid waveguide ( 6 ) that consists of metal tubing and/or of hose, said mechanical amplifier of pulsations ( 4 ) is connected with a nozzle and/or nozzle system ( 7 ) by means of the liquid waveguide ( 6 ) that is fitted with a pressure liquid feed ( 5 ); said acoustic system is parallelly connected to the said pressure liquid feed ( 5 ) at arbitrary distance from the nozzle and/or nozzle system ( 7 ), and a tuneable resonant chamber ( 9 ) for tuning up of the resonant natural frequency of the acoustic system to the driving frequency of pressure pulsations.