Patents by Inventor Hans J. Dull

Hans J. Dull 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).

  • Patent number: 4393786
    Abstract: A track crossing for a carriage of a two track suspension railroad arranged in a box girder has, on both sides of a slot provided in the lower flange of the box girder, running surfaces for support wheels, and at the sidewalls of the box girder, current rails and parallel guide surfaces for lateral guide rollers. For bridging and unused track two slewable support members with lateral guide surfaces and, optionally, running surfaces for the support wheels are provided. Current rails are arranged on at least one of the support members. The support members can be swung into depressions of the fixed sidewalls of the box girder of the one or the other track.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: July 19, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans J. Dull, Adolf Hillmer