Patents by Inventor Helmut Rotsch

Helmut Rotsch 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).

  • Vibration tamper
    Patent number: 5645370
    Abstract: A vibration tamper for packing soil has a guide handle elastically hinged on a tamper head of the tamper. The pivot point of the guide handle is located on the tamper head above an imaginary perpendicular extending from the grip area of the handle to the tamper longitudinal axis, and/or the handle has a special distribution of mass with regard to its pivot point.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: July 8, 1997
    Assignee: Bomag GmbH
    Inventors: Arno Zurbes, Helmut Rotsch