Patents by Inventor Elmer Heitstuman

Elmer Heitstuman 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).

  • Patent number: 5911671
    Abstract: A grass dethatching system includes a frame with at least one support member suitable to support the frame above the grass, the frame is adapted for mounting a dethatching apparatus, and the frame is adapted for detachably attaching to a vehicle. The dethatching apparatus includes a dethatch assembly rotatable about a central axis and at least one elongate member rotatable with the dethatch assembly at a location offset from the central axis. A plurality of tines are freely rotatably connected to and spaced apart along the elongate member in such a manner that the tines will periodically contact the grass when the dethatch assembly is rotated about the central axis. A drive assembly is connected to the frame which rotates the dethatch assembly at a rotational speed independent of the motion of the support member.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: June 15, 1999
    Inventor: Elmer Heitstuman