Patents by Inventor Rudolf Gerlach

Rudolf Gerlach 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).

  • Ballast-free permanent rail way having recessed tie with central fastening element
    Patent number: 5435486
    Abstract: To make a ballast-free permanent rail way, an asphalt base is applied to a substructure comprised of concrete. Railway ties, which have a recess in the center on their underside, are laid on the asphalt base. In order to secure the ties against transverse forces and to assure accurate fitting and wear-free anchoring, the ties have a first bore in the center and the substructure has a blind bore. The blind bore is filled with an adhesive and then a dowel or a threaded rod is inserted into the blind bore which passes through a sliding spacer sleeve inserted into the first bore.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: July 25, 1995
    Assignee: Walter Bau-Aktiengesellschaft
    Inventors: Rudolf Gerlach, Ralf Walter, Bernhard Schad, Gunther Leykauf, Josef Eisenmann