Patents by Inventor Henry F. Erikson

Henry F. Erikson 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).

  • Blade plow with vertically reciprocating blades
    Patent number: 5669452
    Abstract: A blade plow preferably formed by three frame sections hingedly coupled together includes a ground or terrain contour following mechanism within each frame section. The contour mechanism allows the middle blade to be raised and lowered to maintain the entire central blade horizontal relative to the plow frame and at a constant depth within the ground. Additional "fixed" blades are hydraulically setable for depth of cut. The terrain contour following mechanism allows for larger frame widths without the usual tendency of smaller width frames to buckle due to ground unevenness.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: September 23, 1997
    Assignee: Quinstar Corporation
    Inventors: James A. Wright, Henry F. Erikson, Glenn A. Wolf, James A. Boone