Patent ID: 7798088

Claim:
A pontoon comprising: a nose cone which has a generally pointed front end, and a rear end; a metal tube which has a front end and a rear end, and said front end of said tube is fastened to said rear end of the nose cone and wherein: said tube has a cross sectional shape in the form of an upper portion and lower portion, and the upper portion of the shape is semi-circular extending downward and terminates with opposing chines extending the full length of the tube, and the lower portion of the shape has equal and opposing generally planar surfaces which extend upward at acute angles from a vertical center line, then turn outward, perpendicular to said vertical center line, meeting the upper portion at said chines, and said rear end of said nose cone has a cross sectional shape substantially matching the cross sectional shape of the front end of said metal tube, and said nose cone comprises one homogeneous piece of metal from said front end of said nose cone to said rear end of said nose cone, and said nose cone has a keel portion with curved edges from said rear end of said nose cone to said front end of said nose cone, and a keel bar extends upward and forward at said curved edges, and said keel bar has side grooves, and said curved edges are received in said grooves and welded to said keel bar.