| Patent Number |
Title Of Patent |
Date Issued |
| 7598654 |
Megasonic processing apparatus with frequency sweeping of thickness mode transducers |
October 6, 2009 |
| A megasonic processing apparatus and method has one or more piezoelectric transducers operating in thickness mode at fundamental resonant frequencies of at least 300 KHz. A generator powers the transducers with a variable-frequency driving signal that varies or sweeps throughout a pr |
| 7495371 |
Cleaning tank with sleeved ultrasonic transducer |
February 24, 2009 |
| A ultrasonic cleaning system includes a tank composed of quartz or silicon carbide and one or more sleeved ultrasonic transducers mounted to the tank. The sleeved ultrasonic transducer has a two-part head mass, including a threaded sleeve and an outer housing that are composed of dif |
| 7247977 |
Ultrasonic processing method and apparatus with multiple frequency transducers |
July 24, 2007 |
| Ultrasonic processing apparatus and methods are disclosed, which includes multiple transducers of at least two different resonant frequencies supplying ultrasonic energy to a liquid filled tank containing components to be cleaned or processed ultrasonically. The transducers are arranged |
| 6924585 |
Sleeved ultrasonic transducer |
August 2, 2005 |
| A sleeved ultrasonic transducer has a two-part head mass, including a threaded sleeve and an outer housing that are composed of different materials. The threaded sleeve is preferably a metal such as titanium that provides superior thread strength for mating with a compression bolt, w |
| 6653760 |
Ultrasonic transducer using third harmonic frequency |
November 25, 2003 |
| An ultrasonic transducer is disclosed that operates efficiently and at low impedance at high frequencies at or near a third harmonic frequency of its piezoelectric crystal. The ultrasonic transducer includes a resonator composed of ceramic material and positioned between a head mass and |
| 5998908 |
Transducer assembly having ceramic structure |
December 7, 1999 |
| An ultrasonic transducer for generating and transmitting ultrasonic wave energy of a predetermined frequency to the surface of an object. The head mass and the tail mass are made from ceramic materials such as silicon carbide or alumina. In a particularly preferred embodiment, the transd |
| 5748566 |
Ultrasonic transducer |
May 5, 1998 |
| This invention relates to an ultrasonic generator apparatus for generating and transmitting enhanced ultrasonic wave energy of a predetermined frequency to a liquid confined in a container which contains a resonance enhancing disc. Such electroacoustic transducer apparatus or generators |
