Patents by Inventor Heinrich Helgemeir

Heinrich Helgemeir 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).

  • Rail head re-form grinding machine
    Patent number: 3945152
    Abstract: A rail head re-form grinding machine is provided with an annular grinding wheel whose lower flat face is adapted to engage and grind the rail head. A circular feeler device fits within the annular grinding wheel and is also engaged by the rail head. The feeler device is vertically movable by a hydraulic piston arrangement the movement of the feeler device being sensed and indicated by a sensing and indicating assembly. The housing which mounts the grinding wheel and feeler device is pivotally carried so that an arcuate surface may be ground on the rail head.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: March 23, 1976
    Inventor: Heinrich Helgemeir