Patents by Inventor Hermann Doring

Hermann Doring 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).

  • Third rail system for track bound transport means
    Patent number: 4219108
    Abstract: In a third rail system for electric railroads, double T shaped third rails are used, the web of which has an internal longitudinal slot to receive the guide projections of support insulators and for the space saving mounting of electrical and mechanical connecting parts of fixed and/or expansion joints. With this slot design, good heat transfer and at the same time, a large mechanical moment of inertia are obtained.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: August 26, 1980
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hermann Doring