Patents by Inventor Leon D. Johnson

Leon D. Johnson 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: 6446298
    Abstract: A scraper for removing debris from the floor of an animal stall includes a central frame member oriented generally parallel to the direction of movement of the scraper assembly and a cross frame member integral with the central frame member, the cross frame member having opposed first and second ends. First and second beams are pivotally supported on the first and second frame member ends and are generally parallel to the cross frame member. First and second scraper blades are pivotally supported, respectively, by the first and second beams, the blades being pivotal from a vertical orientation adapted for scraping a floor surface during advancement of the blade assembly in a first direction and pivotal to elevated, non-scraping orientation for retraction of the assembly in a direction opposite from the scraping direction. Preferably, a pair of end scrapers are supported by the outer ends of each of the two beams and hingedly connected thereto by a vertical hinge.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: September 10, 2002
    Assignee: Berg Equipment Company
    Inventors: Vernon R. Berg, Jr., Leon D. Johnson