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Ultrasonic treatment device

  • US 4,961,424 A
  • Filed: 07/27/1988
  • Issued: 10/09/1990
  • Est. Priority Date: 08/05/1987
  • Status: Expired due to Term
First Claim
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1. An ultrasonic treatment device, comprising:

  • an ultrasonic vibration generator;

    amplifier means, connected to said ultrasonic vibration generator, for amplifying ultrasonic vibrations generated by said ultrasonic vibration generator; and

    vibration transmitting means, having an elongated portion and connected to said amplifier means, for transmitting the ultrasonic vibrations;

    said ultrasonic vibration generator including means for generating ultrasonic vibrations in the longitudinal axial direction and in a substantially lateral direction of the elongated portion of said transmitting means comprised of (a) a piezoelectric element, (b) both end faces of said piezoelectric element having an electrode attached thereto, said electrode comprising a plurality of electrode pieces, and (c) voltage supply means for applying voltages of different levels, respectively, to the electrode pieces.

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