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Method of Maintaining Constant Movement of a Cutting Blade of an Ultrasonic Waveguide

  • US 20110190800A1
  • Filed: 03/25/2011
  • Published: 08/04/2011
  • Est. Priority Date: 12/03/2007
  • Status: Active Grant
First Claim
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1. A method of maintaining constant movement of a cutting blade of an ultrasonic waveguide, which comprises:

  • providing;

    an ultrasonic transducer operable to convert a received motional voltage into a movement of a cutting blade of an ultrasonic waveguide;

    a motional feedback circuit connected in a parallel configuration with the ultrasonic transducer; and

    a variable power source operable to apply a first voltage between a set of connection points to the parallel configuration;

    determining a feedback voltage measured from the motional feedback circuit; and

    varying an output of the power source based upon the measured feedback voltage to result in a substantially constant feedback voltage and, thereby, maintain a substantially constant rate of movement of the cutting blade across a variety of cutting loads.

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