Patents by Inventor Rudolf Harder

Rudolf Harder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Shockwave generator having an ultrasound applicator shielded from shockwaves
    Patent number: 5228447
    Abstract: A shockwave generator for extracorporeal lithotripsy has a housing filled with an acoustic propagation medium, through which shockwaves propagate, and in which an ultrasound applicator is disposed for locating a calculus to be treated. The ultrasound applicator has components which may be damaged if traversed by shockwaves. At least a portion of the ultrasound applicator in which these components are disposed is therefore acoustically shielded with a substance having an acoustic impedance substantially differing from the acoustic impedance of the propagation medium, so that essential parts of the shockwaves are reflected thereby and thus the non-reflected parts do not reach the shielded portion of the ultrasound applicator with sufficient energy to damage the compartments.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: July 20, 1993
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rudolf Harder, Gert Hetzel, Hans Kaarmann, Georg Koehler, Hermann Kuehnke, Arnim Rohwedder, Ulrich Schaetzle