Patents by Inventor Lyle Harper

Lyle Harper 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: 4850435
    Abstract: The convex upper surface of the generally triangular sweep has oppositely inclined, lateral faces that diverge from the forwardmost point of the sweep and serve to loosen and lift the soil while the outer cutting edges sever subsurface roots of weeds and other above-ground growth. Rigid, rearwardly extending flaps at the rear extremity of the sweep are disposed at such a strategic angle that although they rigidify the trailing section of the sweep and reduce wear which might otherwise occur at outer rear corners of the sweep, they avoid untoward turning and rolling of the loosened soil and severed plant materials so that moisture-retaining trash and plant residue is left intact on the ground surface.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: July 25, 1989
    Assignee: Morris Rob-Weeder Company, Ltd.
    Inventors: George H. Morris, Donald M. Michalchuk, Lyle Harper