Patents by Inventor Norman A. Nystrom

Norman A. Nystrom 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: 4685889
    Abstract: A tunnel boat design that is not dependent upon turbulent or resurgent water flow is disclosed. A V-shaped portion of the tunnel and its adjacent rectangular-shaped tunnel portion "direct" water toward a funnel-shaped tunnel portion which "funnels" the water into a semi-circular tunnel portion surrounding the propeller. By obliquely positioning the V-shaped portion, the rectangular-shaped portion and the funnel-shaped portion of the tunnel at pre-determined angles with respect to the keel line of the boat, sufficient water is "lifted" upwardly within the tunnel and directed toward the propeller to propel the boat without causing turbulent or resurgent water flow and/or cavitation.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: August 11, 1987
    Inventor: Norman A. Nystrom