Patents by Inventor Donald K. Landphair

Donald K. Landphair 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).

  • Foldable frame flexing hinge
    Patent number: 4607708
    Abstract: A forwardly foldable implement frame having a horizontal pivot or flex hinge to enable vertical flexing of the wing sections to follow the ground contour. The frame includes a pair of cam bumpers rigidly attached to the wing beam in near proximity to the flex hinge. Folding of the wing sections toward one another causes the cam bumpers to contact and automatically lock out the flex hinge.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: August 26, 1986
    Assignee: Deere & Company
    Inventors: Donald K. Landphair, Gordon L. Salley
  • Socket casting with a cast-in ball and method of casting
    Patent number: 4539246
    Abstract: A method of forming a socket with a cast-in spherical ball having a central opening formed therethrough. The method includes preparation of a core assembly to incorporate the ball such that a portion of the circumference of the ball surface defines a portion of the casting cavity forming a race surface for the ball.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: September 3, 1985
    Assignee: Deere & Company
    Inventors: Donald K. Landphair, James P. Doering