Patents by Inventor Felix Kraker

Felix Kraker 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).

  • Cleaning member for cleaning the interior of heat exchanger tubes
    Patent number: 4406031
    Abstract: Cleaning member for cleaning the interior of heat exchanger tubes by rotating, including a sponge rubber element being adapted to suit the diameter of the heat exchanger tube, and abrasive elements connected to the sponge rubber body, the abrasive elements being in the form of bristles each having a bristle shaft, and a bristle base molded into the sponge rubber ball anchoring the bristles.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: September 27, 1983
    Assignee: Taprogge Gesellschaft mbH
    Inventors: Klaus Eimer, Felix Kraker, Hans W. Schildmann, Gunther Schmitz, Hans Sonnenschein