| Patents for B06B 1 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency (14,020) |
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| 05/02/1990 | EP0247126B1 Tubular acoustic projector |
| 05/01/1990 | US4921415 Cure monitoring apparatus having high temperature ultrasonic transducers |
| 05/01/1990 | US4920955 Shock wave source |
| 04/19/1990 | WO1990004318A1 Air-gap hydrophone |
| 04/19/1990 | WO1990003854A1 Method for removal of materials stuck or frozen on the walls of receptacles |
| 04/18/1990 | EP0363785A2 Transducer for the detection of dynamic forces, measuring and/or control equipment and method including such transducer |
| 04/18/1990 | CN1041295A Vibration excitor with time effect |
| 04/10/1990 | US4916675 Broadband omnidirectional electroacoustic transducer |
| 04/10/1990 | US4915115 Ultrasonic imaging apparatus for displaying B-mode and Doppler-mode images |
| 04/10/1990 | CA1267720A1 Method and device for electrically powering a transducer used to generate sound and ultrasound vibrations |
| 04/04/1990 | EP0360806A1 Air-driven low-frequency sound generator with positive feedback system. |
| 04/03/1990 | US4913234 Fluid driven screw type sonic oscillator-amplifier system for use in freeing a stuck pipe |
| 03/28/1990 | EP0359863A1 High voltage generator and method for producing a high-voltage pulse with a large current for driving a shock-wave generator |
| 03/28/1990 | CN2055066U Infrasonic and low-frequency sonic generator |
| 03/27/1990 | US4912357 Ultrasonic MHz oscillator, in particular for liquid atomization |
| 03/27/1990 | US4911172 Probe tip ultrasonic transducers and method of manufacture |
| 03/27/1990 | US4910838 Method for providing a desired sound field as well as an ultrasonic transducer for carrying out the method |
| 03/21/1990 | EP0359217A2 Linear power control for ultrasonic probe with tuned reactance |
| 03/21/1990 | EP0358744A1 Vibrator. |
| 03/20/1990 | US4909240 Ultrasound head with removable resonator assembly |
| 03/20/1990 | CA1266789A1 Drive mechanism for a domestic vibration apparatus |
| 03/15/1990 | DE3830783C1 Acoustic signal transmitter, particularly chime signal transmitter, for motor vehicles |
| 03/13/1990 | US4908631 Ultrasonic pixel printer |
| 03/13/1990 | US4908543 Acoustic transducer |
| 03/13/1990 | US4908536 Vibration suppressing by electrical termination impedance |
| 03/07/1990 | CN1040159A Hydraulic vibration device capable of eliminating automatically piston deviation |
| 03/06/1990 | US4907209 Low frequency sound transducer |
| 03/06/1990 | US4906886 Ultrasound sensor |
| 02/28/1990 | EP0355694A2 Piezoelectric composite transducer for use in ultrasonic probe |
| 02/22/1990 | DE3827422A1 Jarring mechanism for the compaction of mouldings |
| 02/14/1990 | EP0354805A2 Ultrasonic lens cleaner |
| 02/13/1990 | US4901034 Process and circuit for exciting an ultrasonic generator and its use for atomizing a liquid |
| 02/13/1990 | US4899636 Instrument for tuning musical instruments |
| 02/08/1990 | WO1990001163A1 Converter for recording acoustic emission signals |
| 02/08/1990 | WO1990000973A1 An ultrasonic pixel printer |
| 02/07/1990 | EP0354117A1 Piezoelectric transducer for volume wave generation |
| 02/07/1990 | EP0353661A2 Concrete block molding machine having continuously driven vibrating shaft mechanism which can be programmably vibrated and method of programmably vibrating such machines |
| 02/07/1990 | CN1039517A Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length |
| 02/06/1990 | CA1265362A1 High frequency resonator for welding material |
| 01/31/1990 | EP0352979A2 Variable amplitude drill |
| 01/31/1990 | CN2052111U Ultrasoni humidifier |
| 01/25/1990 | WO1990000792A1 Ultrasonic transducer comprising at least one row of ultrasonic elements |
| 01/25/1990 | WO1990000730A1 Acoustic field transducers |
| 01/23/1990 | US4895290 Transducers, vacuum deposition of gold layer, pressing layers together |
| 01/23/1990 | US4894895 Method of making an ultrasonic probe |
| 01/18/1990 | DE3823477A1 Process for producing ultrasonic transducers |
| 01/17/1990 | EP0351285A1 Piezo electric detector with at least two long, sensitive, supple elements |
| 01/17/1990 | EP0351015A2 A method for fabricating a piezoelectric composite transducer |
| 01/17/1990 | CN1006477B Controller for vibration type pile-driving machine |
| 01/11/1990 | WO1990000095A1 Frequency controlled motor driven low frequency sound generator |
| 01/11/1990 | WO1990000094A1 An ultrasonic emitter and a device for focussing ultrasonic emissions |
| 01/11/1990 | WO1990000093A1 Low frequency sound generator, especially for grills |
| 01/09/1990 | CA1264371A1 Flexible piezoelectric transducer assembly |
| 01/09/1990 | CA1264370A1 Method and apparatus for generating low frequency acoustic energy waves |
| 01/02/1990 | US4890687 Borehole acoustic transmitter |
| 01/02/1990 | US4890651 Ultrasonic automatic cup filling method operating adjacent valves on different A.C. half cycles |
| 12/28/1989 | WO1989012528A1 Integral acoustic emission sensor for manufacturing processes and mechanical components |
| 12/28/1989 | DE3920316A1 Vibrationsmechanismus fuer eine verdichtungswalze Vibration mechanism for a compaction roller |
| 12/27/1989 | CN1038227A Sonic generator |
| 12/26/1989 | US4890268 Two-dimensional phased array of ultrasonic transducers |
| 12/26/1989 | US4889035 Magnetically actuated valve for cyclically operating piston-cylinder actuator |
| 12/26/1989 | US4888861 Annular array and method of manufacturing same |
| 12/21/1989 | DE3818944A1 Internal (immersion) vibrator for compacting powdered media |
| 12/20/1989 | EP0346891A2 Ultrasonic probe and method of manufacturing the same |
| 12/19/1989 | US4888746 Focussing ultrasound transducer |
| 12/19/1989 | US4888565 Apparatus for generating ultrasonic signals |
| 12/19/1989 | US4888516 Piezoelectrically excitable resonance system |
| 12/14/1989 | DE3916032A1 Active damping (absorbing, attenuating) devices for vibrations, in particular in the form of noise, in a series arrangement |
| 12/14/1989 | DE3916031A1 Active damping (absorbing, attenuating) device for vibrations, in particular in the form of noise, without acoustic delay |
| 12/13/1989 | EP0345484A2 Knocker with self-control |
| 12/13/1989 | EP0345481A2 Pneumatic knocker |
| 12/12/1989 | US4887248 Electrostatic transducer and method of making and using same |
| 12/07/1989 | DE3817996A1 Verfahren zur erzeugung von stosswellen und dazu geeigneter stosswellengenerator Process for the production of shock waves and shock wave generator suitable to |
| 12/05/1989 | US4885783 Elastomer membrane enhanced electrostatic transducer |
| 11/30/1989 | WO1989011251A1 Process for generating shock waves and shock wave generator for implementing said process |
| 11/29/1989 | EP0343403A1 Circuit for the self-excitation of a mechanical oscillation system to its characteristic resonant frequency |
| 11/29/1989 | CN1005899B Electrohydraulic servo vibration exciting installation |
| 11/28/1989 | US4883100 Automatic control system for filling beverage containers |
| 11/23/1989 | EP0343005A2 Driving circuit for driving a piezoelectric vibrator |
| 11/23/1989 | EP0342874A2 Ultrasound probe for medical imaging system |
| 11/23/1989 | EP0342446A2 Ultrasonic device |
| 11/21/1989 | US4882525 Method for controlling the working frequency of an electro-acoustic vibrating device |
| 11/16/1989 | WO1989011042A1 A method for producing pressure pulses in a mass of gas and a device for performing the method |
| 11/16/1989 | WO1989010813A1 Ceramic electrode material and electrical devices formed therewith |
| 11/16/1989 | WO1989010802A1 Circuitry for self-excitation of self-resonant vibrations in a mechanical vibrating system |
| 11/15/1989 | EP0341505A2 Ultrasonic device |
| 11/15/1989 | CN2047603U Frequency-increasing adhesive vibrator |
| 11/14/1989 | US4880010 Method of and apparatus for ultrasonic imaging |
| 11/14/1989 | US4879993 Shock wave source for generating a short initial pressure pulse |
| 11/08/1989 | EP0340674A2 Flextensional sonar transducer assembly |
| 11/08/1989 | EP0340624A2 Electroacoustic transducer |
| 11/08/1989 | EP0340470A1 Method and circuit for driving an ultrasonic transducer, and their use in atomizing a liquid |
| 11/07/1989 | US4879528 Ultrasonic oscillation circuit |
| 11/02/1989 | WO1989010677A1 Flextensional transducer |
| 11/02/1989 | WO1989010213A1 Device for cleaning a surface in order to remove sticky substances |
| 11/02/1989 | DE3812684A1 Method for fast scanning of uneven surfaces with the scanning tunnel microscope |
| 10/31/1989 | US4878207 Composite sonar transducer for operation as a low frequency underwater acoustic source |
| 10/25/1989 | EP0338998A2 Periodically variable multitone generator |
| 10/25/1989 | EP0338933A1 Active magnetically suspended vibration device controlled in three axes |
| 10/24/1989 | US4876675 Towed piezoelectric cable |