Patent ID: 7524225

Claim:
At least one pair of hydrodynamic ridge devices for attachment to the bottom surface of an existing surfboard, to channel lateral water flow and direct it longitudinally along the underside of the surfboard to provide beneficial hydrodynamic effects, stability, speed, control, and performance of the surfboard, each hydrodynamic ridge device comprising: an elongate longitudinal body having a short flat vertical side, a wide flat top side extending horizontally from a top edge of said vertical side generally perpendicular thereto terminating in a convex generally arcuate outer edge, and a convex curved bottom surface extending between a bottom edge of said vertical side and said arcuate outer edge of said top side; said bottom edge of said short vertical side being an arcuate bottom edge that curves upwardly to a point at each end, said convex arcuate outer edge of said top surface curving inwardly at each end to join a respective said point at each end of said vertical side, and said convex curved bottom surface curving upwardly and outwardly from said vertical side bottom edge to adjoin said top side arcuate outer edge and said respective point at each end of said vertical side; said flat top side having a width greater than the height of said short vertical side; said elongate longitudinal body having a generally triangular pie-shaped transverse cross sectional shape at its midsection defined by said vertical side, said top side, and said bottom side, and said elongate longitudinal body being thicker at its midsection and diminishing symmetrically in thickness along its width and length in a gradual curve toward each said respective point at each end of said vertical side; and a layer of adhesive material on said flat top side covered by a protective backing layer to be peeled off for adhesively mounting said longitudinal body to the bottom surface of the existing surfboard in a generally aft region thereof.