Patents by Inventor Helmut Unger

Helmut Unger 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: 4864728
    Abstract: A brushcutter has a guide wand with a drive head rotatably mounted thereon. A motor rotatably drives the drive head and a cutting head for cutting vegetation is mounted on the drive head and defines a rotational plane. A protective arrangement partially overlaps the cutting tool in the region of the rotational plane and has a downwardly extending wall. A detachable skirt extends from the wall downwardly so as to terminate at an elevation beneath the rotational plane and deflects stones and other hard objects caught by the cutting tool thereby protecting an operator of the brushcutter against injury.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: September 12, 1989
    Assignee: Andreas Stihl
    Inventors: Manfred Kloft, Gerhard Zerrer, Helmut Unger