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Ultrasound handpiece

  • US 8,814,894 B2
  • Filed: 09/11/2009
  • Issued: 08/26/2014
  • Est. Priority Date: 08/12/2004
  • Status: Active Grant
First Claim
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1. An ultrasonic hand piece, comprising:

  • a shell; and

    an ultrasonic horn held within the shell, the horn configured to produce torsional movement of a cutting tip in response to a drive signal having a first frequency and a first amplitude and longitudinal movement of the cutting tip in response to a drive signal having a second frequency and a second amplitude;

    wherein the drive signal having the first frequency is alternated with the drive signal having the second frequency; and

    further wherein the horn is held within the shell so that a torsional nodal point and a proximal longitudinal nodal point are coincident at a plug that seals the shell on an end of the hand piece opposite the cutting tip.

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