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| Fluidized bed gasification ash reduction and removal process |
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| Apparatus for humidifying a gas |
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| Atomizing and mixing apparatus |
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| Apparatus for impregnating water with CO.sub.2 using a stepped channel with multiple gas inlets |
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| Atmospheric deaerator unit |
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| Photoreceptor heating apparatus |
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| Copying apparatus with a heated photosensitive drum |
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Operation device
| Details |
Inventors: Idemoto, Morito; Inoue, Naohiko; Noguchi, Yasuo;
Assignee: Sumitomo Bakelite Company Company Limited (Tokyo, JP)
Primary Examiner: Cohen; Lee S.
Assistant Examiner: Pfaffle; K. M.
Attorney, Agent or Firm: Browdy and Neimark
A surgical operation device comprising an ultrasonic piezoelectric transducer for generating ultrasonic vibrations, an oscillation feedback type oscillator for supplying high-frequency power to the ultrasonic transducer, a vibration transmitter connected to the ultrasonic transducer for transmitting and amplifying mechanical vibrations at an ultrasonic frequency, a suction unit and an irrigator. The ultrasonic transducer includes a bolted Langevin type transducer. The feedback circuit of the oscillation feedback type oscillator includes an oscillation voltage detector, a phase comparator, a low pass filter, a differential amplifier, and a voltage controlled oscillator. Thus, the mechanical resonant frequency can be traced in a wide range of fluctuations of a load on the vibration transmitter during vibration and vibrations can start an appropriate mechanical resonate frequency irrespective of the load status of the vibration transmitter at the start-up. |
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DETAILED DESCRIPTION In order to solve such problems with the conventional surgical operation devices, the present invention provides a surgical operation device which includes an ultrasonic oscillator capable of widely tracing the mechanical resonant frequency in accordance with load fluctuation and starting with an appropriate frequency, a bolted CF-type Langevin transducer of a reduced leakage current, an ultrasonic vibration transmitter of high fatigue strength and for a soft organization, and an ultrasonic vibration transmitter for severing and/or cutting a hard organization efficiently.
The present invention provides a surgery operation device comprising: an ultrasonic piezoelectric transducer for generating ultrasonic vibrations; an oscillation feedback type oscillator for supplying high-frequency power to the transducer; a vibration transmitter connected to the resonator for transmitting and amplifying a mechanical vibration at an ultrasonic frequency; a sucking unit; and an irrigator; wherein the piezoelectric transducer includes a bolted Langevin type transducer; and wherein the feedback circuit of the oscillation feedback oscillator includes an oscillation voltage detector, a phase comparator, a low pass filter, a differential amplifier, and a voltage controlled oscillator.
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Liquid Purification 
