Patents by Inventor Guenter PRETTERHOFER

Guenter PRETTERHOFER 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).

  • Arrangement for reducing radiation of noise from liquid-cooled transformers or chokes
    Patent number: 10777350
    Abstract: An arrangement for reducing the radiation of noise from liquid-cooled transformers or chokes includes a tank having stiffeners arranged outside on the side walls of the tank, where a region situated between each stiffener is covered by a sandwich panel that is fastened to each stiffener, where each sandwich panel has a metallic wall that hermetically closes off a cavity that is filled with a composition composed of a polymer material and a filler material, where the composition has a specific weight of >2 grams per cubic centimeter.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: September 15, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Anton Holzer, Helmut Pregartner, Guenter Pretterhofer, Alfons-Karl Schrammel
  • Arrangement for Reducing Radiation of Noise from Liquid-Cooled Transformers or Chokes
    Publication number: 20180047500
    Abstract: An arrangement for reducing the radiation of noise from liquid-cooled transformers or chokes includes a tank having stiffeners arranged outside on the side walls of the tank, where a region situated between each stiffener is covered by a sandwich panel that is fastened to each stiffener, where each sandwich panel has a metallic wall that hermetically closes off a cavity that is filled with a composition composed of a polymer material and a filler material, where the composition has a specific weight of >2 grams per cubic centimeter.
    Type: Application
    Filed: January 20, 2016
    Publication date: February 15, 2018
    Inventors: Anton HOLZER, Helmut PREGARTNER, Guenter PRETTERHOFER, Alfons-Karl SCHRAMMEL