Patents by Inventor David L. Sprague, II

David L. Sprague, II 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).

  • Electrically operated recreational vehicle drain valve
    Patent number: 6098956
    Abstract: An electrically operated drain valve for recreational vehicles economically fabricated primarily of synthetic plastic parts which is relatively free of corrosion at critical areas and readily retrofitted to existing recreational vehicle drain systems. A housing containing a geared reversible electric motor operating a linear displaceable rack associated with the drain valve operator permits the drain valve to be displaced between open and closed positions.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: August 8, 2000
    Assignee: Barker Manufacturing Company, Inc.
    Inventor: David L. Sprague, II