Patents by Inventor John Van der Male

John Van der Male 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).

  • Tractor power broom apparatus
    Patent number: 5187828
    Abstract: A self-propelled tractor is operative through a gear drive to effect rotation of a cylindrical broom member mounted forwardly of the associated tractor. The broom member is selectively rotatable through a linkage assembly mounted to the broom and to the tractor. Rotation of the broom effects sweeping of debris and leaves relative to a lawn. Cleaning rods are directed into the broom and reciprocatable relative to the broom to effect cleaning of the bristles during use.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: February 23, 1993
    Inventors: Gerald W. Hoffmann, John Van der Male