Patents by Inventor Robert L. Shirley

Robert L. Shirley 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: 4392448
    Abstract: A ski boat for producing a relatively small, well-defined wake and a relatively smooth working table includes a V-shaped keel section. The angle of the "V" increases towards the stern of the hull. A chine panel is mounted at each of the outboard edges of the keel section. A secondary chine is located on each side of the keel section, being parallel to the centerline of the V-shaped keel section and following the contour of the keel section. A concave depression panel is located at the stern of the boat, extending forwardly therefrom into the keel section.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: July 12, 1983
    Assignee: Master Craft Boat Company
    Inventor: Robert L. Shirley
  • Patent number: 4263866
    Abstract: An elongated ski boat is provided for producing a relatively small, well-defined wake and a relatively smooth working table. The boat comprises an elongated hull which includes a bow, a stern, a port side, a starboard side and a transom. The hull comprises a starboard keel panel and a port keel panel, each of which extends from a location above the water line near the bow to the stern of the hull. The keel panels join one another at a center keel line to form a V-shaped keel section having a starboard edge and a port edge. The V-shaped keel section defines an obtuse angle at the bow which progressively increases to an angle of slightly less than 180.degree. at the stern. A starboard chine panel and a port chine panel are each joined to the respective edge of the keel section, extending forwardly from the stern to a location above the water line near the bow.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: April 28, 1981
    Assignee: Master Craft Boat Company
    Inventor: Robert L. Shirley
  • Patent number: D260755
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: September 15, 1981
    Assignee: Master Craft Boat Company
    Inventor: Robert L. Shirley