Patents by Inventor Robert B. Dehls

Robert B. Dehls 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: 4899932
    Abstract: An improved highway grade crossing for railroad tracks. The crossing is comprised of a plurality of wood panels which are capped with an expanded polymer. The polymer provides a wear surface for the crossing which can be replaced without having to take up the entire crossing structure. In one embodiment the polymer cap is a rubber and steel composite. The steel keeps the rubber stretched to substantially avoid temperature induced expansion and buckling of the rubber. Deterioration resulting from vehicular traffic over a buckled surface is thus avoided.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: February 13, 1990
    Assignee: Koppers Industries, Inc.
    Inventors: Dale K. Beachy, Robert B. Dehls, S. Hudson Owen, James H. Simpson