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Broadwin Alan, Emery Leonard Meredith: Magnetostrictive transducer.. Valleylab, June 27, 1990: EP0375302-A1 (309 worldwide citation)

A magnetostrictive transducer comprising a plurality of elongated strips (31) of magnetostrictive material, each strip having a proximal end and a distal end and being attached to its adjacent strip at the ends to form an integral substantially rigid column having a central axis with fins extending ...


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Rose Emery S: Control system for use in ultrasonic surgical apparatus. Valleylab, May 15, 1996: EP0711611-A2 (307 worldwide citation)

An electrical apparatus for driving an ultrasonic piezoelectric crystal transducer in a surgical handpiece for the fragmentation and aspiration of tissue, which apparatus includes an electronic control loop (12) in combination with a voltage source amplifier (2) having an output which is connected t ...


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Broadwin Alan, Klicek Michael S, Kreizman Alexander S, Olichney Michael D, Rose Emery S: An ultrasonic surgical handpiece and an energy initiator to maintain the vibration and linear dynamics. Valleylab, April 23, 1997: EP0768840-A1 (304 worldwide citation)

An ultrasonic oscillator (46) drives a tool at a set frequency. An amplitude control runs the oscillator (46) to set the vibration level. A frequency regulator joins the amplitude and the oscillator (46). A control feedback loop (49), in the frequency regulator, keeps handpiece linear dynamics. An o ...


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Rose Emery S: Ultrasonic surgical apparatus.. Valleylab, November 23, 1994: EP0625077-A1 (304 worldwide citation)

An electrical apparatus for driving an ultrasonic piezoelectric crystal transducer in a surgical handpiece for the fragmentation and aspiration of tissue, which apparatus includes an electronic control loop in combination with a voltage source amplifier having an output which is connected to the pie ...


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Shinichiro Umemura, Kenichi Kawabata, Kenko Uchida, Kenji Yasuda, Yasuo Wada, Atsushi Hiraiwa: Ultrasonic irradiation apparatus and processing apparatus based thereon. Hitachi, Antonelli Terry Stout & Kraus, June 4, 1996: US05523058 (176 worldwide citation)

By providing an ultrasonic irradiation apparatus for generating acoustic cavitation efficiently, it is intended to realize an ultrasonic therapeutic apparatus for generating the action of cavitation on a living body suitable for medical treatment of malignant tumors and medical treatment of thrombi ...


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Donald D Schwellenbach: LaValle D Ptak, April 21, 1981: US04262549 (170 worldwide citation)

A variable mechanical vibrator includes a first eccentric weight fixed to a rotatably mounted shaft. A second eccentric weight is rotatably mounted on the shaft, and the two weights are rotated together under control of mating engagement abutments, one carried by the shaft and one carried by or comp ...


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James A Laugharn Jr, Brevard S Garrison: Method and apparatus for acoustically controlling liquid solutions in microfluidic devices. Covaris, Fish & Neave IP Group, Ropes & Gray, September 27, 2005: US06948843 (153 worldwide citation)

Acoustic energy is used to control motion in a fluid. According to one embodiment, the invention directs acoustic energy at selected naturally occurring nucleation features to control motion in the fluid. In another embodiment, the invention provides focussed or unfocussed acoustic energy to selecti ...



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