Patents by Inventor Donald D. Graham

Donald D. Graham 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).

  • Pivot lip dump gate
    Patent number: 5823630
    Abstract: A pivot lip dump gate for the dump body of a dump truck, trailer or the like comprises a split gate including a large upper hinged gate portion and a hinged lower gate or lip which serves the double function of guiding contents rearwardly from the dump body in its lowered dumping position and for closing the rearward end of the dump body in its raised transport position while also serving to lock the swinging upper gate in its closed transport position.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: October 20, 1998
    Assignee: Omni Holding Company
    Inventor: Donald D. Graham