Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

BPERFORMING OPERATIONS TRANSPORTING B06Mechanical vibrations B06BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY

B06B1/00Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

B06B1/02making use of electrical energy B06B1/0207Driving circuits B06B1/0215for generating pulses B06B1/0223for generating signals continuous in time B06B1/023and stepped in amplitude B06B1/0238of a single frequency B06B1/0246with a feedback signal B06B1/0253taken directly from the generator circuit B06B1/0261taken from a transducer or electrode connected to the driving transducer B06B1/0269for generating multiple frequencies B06B1/0276with simultaneous generation B06B1/0284with consecutive, i.e. sequential generation B06B1/0292Electrostatic transducers B06B1/04operating with electromagnetism B06B1/045using vibrating magnet, armature or coil sytem B06B1/06operating with piezo-electric effect or with electrostriction B06B1/0603using a piezo-electric bender B06B1/0607using multiple elements B06B1/0611in a pile B06B1/0614for generating several frequencies B06B1/0618of piezo- and non-piezo-electric elements B06B1/0622on one surface B06B1/0625Annular array B06B1/0629Square array B06B1/0633Cylindrical array B06B1/0637Spherical array B06B1/064with multiple active layers B06B1/0644using a single piezo-electric element B06B1/0648of rectangular shape B06B1/0651of circular shape B06B1/0655of cylindrical shape B06B1/0659of U-shape B06B1/0662with an electrode on the sensitive surface B06B1/0666used as a diaphragm B06B1/067which is used as, or combined with, an impedance matching layer B06B1/0674and a low impedance backing B06B1/0677and a high impedance backing B06B1/0681and a damping structure B06B1/0685on the back only of piezo-electric elements B06B1/0688with foil-type piezo-electric elements B06B1/0692with a continuous electrode on one side and a plurality of electrodes on the other side B06B1/0696with a plurality of electrodes on both sides B06B1/08operating with magnetostriction B06B1/085using multiple elements B06B1/10making use of mechanical energy B06B1/12operating with systems involving reciprocating masses B06B1/14the masses being elastically coupled B06B1/16operating with systems involving rotary unbalanced masses B06B1/161Adjustable systems B06B1/162Making use of masses with adjustable amount of eccentricity B06B1/163the amount of eccentricity being only adjustable when the system is stationary B06B1/164the amount of eccentricity being automatically variable as a function of the running condition B06B1/165with fluid masses or the like B06B1/166Where the phase-angle of masses mounted on counter-rotating shafts can be varied B06B1/167Orbital vibrators having masses being driven by planetary gearings, rotating cranks or the like B06B1/168Rotary pendulum vibrators B06B1/18wherein the vibrator is actuated by pressure fluid B06B1/183operating with reciprocating masses B06B1/186operating with rotary unbalanced masses B06B1/20making use of a vibrating fluid