Patents by Inventor Fritz J. Schmidt

Fritz J. Schmidt 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).

  • Method of and an apparatus for reconstructing railway track systems
    Patent number: 5802744
    Abstract: An apparatus for reconstructing railway track systems while simultaneously clearing away the bed of the old track system. A sliding seal driver is used to secure the trench formed by the removal of the old track foundation as the old track is cleared away. A new trench is cut as the apparatus proceeds on the same path as the old track. The seal driver includes lateral shields securing the trench walls as well as ground shields resting on the bottom of the trench. The lateral shields are of such lengths to secure the trench walls over the entire work area.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: September 8, 1998
    Inventors: Werner Kampmann, Herbert Heitkamp, Klaus Linde, Werner Schmidt, Fritz J. Schmidt, Franz Oppel, Jurgen Rieger