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Device for acting by ultrasonic vibrations on an object

  • US 5,160,336 A
  • Filed: 10/19/1990
  • Issued: 11/03/1992
  • Est. Priority Date: 11/18/1987
  • Status: Expired due to Term
First Claim
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1. An intracorporeal lithotriting device for use with an endoscope of a size compatible with its introduction into a urinary passage, comprising:

  • a) a high frequency shock wave generator having a projectile of an elongate shape and defining an axial length dimension and arranged within a guiding tube of a substantially greater axial length dimension than that of said projectile, said projectile being completely enclosed within said guiding tube and said guiding tube axially guiding said projectile during alternating forward and return axial movements along the entire length of said guiding tube, said axial movements being imparted to said projectile by means disposed at an upstream end of said guiding tube;

    b) a waveguide of an elongate shape in axial alignment with said guiding tube at a downstream end thereof and of an axial length greater than that of the projectile, said waveguide having an impact interface opposite said upstream end of said guiding tube, said impact interface being struck periodically by said projectile during its axial movements whereby shock waves are generated that are transmitted through said waveguide;

    c) said waveguide being adapted for applying its free end opposite said impact interface against a calculus and for thusly transmitting said shock waves directly to said calculus for breaking it.

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