Patents by Inventor Leonhard Hefter

Leonhard Hefter 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).

  • Moving stairway or sideway cleaning device
    Publication number: 20030101536
    Abstract: The invention relates to an improved cleaning device for moving stairways or sidewalks that is characterized in that it comprises in addition to its cleaning head (7) an off-set support leg (13). The cleaning device is further provided with a gripper, guide, steering and/or control device (3) that comes to rest above the support (16) of the support leg (13), and/or the cleaning head can be swiveled by 180° with respect to its operative position and/or the cleaning device is further provided with a strip-shaped broom device (41) that has the function of a sealing strip for a suction strip (23).
    Type: Application
    Filed: September 30, 2002
    Publication date: June 5, 2003
    Inventors: Christian Hefter, Leonhard Hefter, Dieter Leikermoser