Patents by Inventor Heinz Zipfel

Heinz Zipfel 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).

  • Rotary lawnmower with grass clearing means
    Patent number: 4245456
    Abstract: A rotary lawnmower of the hovering air cushion type, or of conventional design, is provided with a grass clearing plate which is preferably mounted on the front of the mower and projects a distance therefrom whereby a part of the mower housing and the grass clearing plate together provide a loading surface for the cut grass. The mowing and cut grass clearing operations occur at the same time, thus eliminating a separate after treatment of the cut lawn.
    Type: Grant
    Filed: April 3, 1979
    Date of Patent: January 20, 1981
    Inventor: Heinz Zipfel