Ultrasonic surgical handpiece

  • US 5,199,943 A
  • Filed: 12/12/1991
  • Issued: 04/06/1993
  • Est. Priority Date: 12/12/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. An ultrasonic surgical handpiece, comprising:

  • a) a generally rigid, hollow body having a reduced diameter portion at a free end and an interior surface;

    b) an ultrasonic piezo-electric horn coaxially mounted inside the body, terminating at the free end and defining a fluid flow passage between the horn and the interior surface of the body at the reduced diameter portion; and

    c) a spiral thread formed in the interior surface at the reduced diameter portion for reducing shearing created by ultrasonic vibration of the horn of a fluid flowing through the fluid flow passage.

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