Patents by Inventor Karl-Erich Partz

Karl-Erich Partz 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).

  • Scoop wheel having oscillating impact cutters
    Patent number: 4663868
    Abstract: A rotary wheel excavator having scoops with impact cutters only at the two front corners of the cutting edge of each scoop. Structure is provided for vibrating each impact cutter during a predetermined portion of the rotation of the wheel. The left and right hand impact cutters on each scoop are independently controlled, depending on the direction of swing of the excavator boom. The operation of the impact cutters is preferably under the control of a hydraulic system.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: May 12, 1987
    Assignee: Mannesmann AG
    Inventors: Rudolf Fauerbach, Karl-Erich Partz