Patents by Inventor David W. Knowley

David W. Knowley 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: 4541646
    Abstract: A mud flap hanger for use on road vehicles such as trucks and truck-tractors wherein the hanger is adapted with pivotally mounted arms to which are attached mud flaps. The mud flaps may be moved from behind the wheel of a truck and stowed centrally between the rear wheels. Pivotal movement of the arms is achieved through use of a flexible bushing generally rectangular in shape wherein the inner walls of a generally square aperture has expansion slots and lubrication grooves for lubricating the arms carried within the aperture.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: September 17, 1985
    Inventor: David W. Knowley