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US 4,867,716 AGranted
Boat
OwnerDouglas F. McFarlandinventor
Life of this patent
Estimating the term…
Abstract
The present invention includes a boat having a pair of rotatable elongated pontoons on opposite sides thereof. Each of the pontoons has helical flighting for propelling the boat during rotation of the pontoon. The pontoon also is filled with floatation materials so as to add to the buoyancy of the vehicle. Each pontoon is independently rotatable so as to achieve maneuverability even without a rudder. A modified form of the present invention utilizes two independently rotatable paddle wheels.
Claims14
A boat for use on a body of water comprising:
- an elongated boat frame having a longitudinal axis, a forward end, a rearward end and first and second opposite sides;
- first and second rotatable drive means rotatably mounted to said frame for rotation about first and second axis and having blade means thereon, said first and second drive means being independently rotatable on said boat frame to cause said blade means to engage said water and propel said boat frame through said water;
- said first and second drive means each comprising a cylindrical body having an outer cylindrical surface and having a float chamber therein imparting buoyancy to said boat frame, said blade means being attached to said outer cylindrical surface of said cylindrical body;
- first power means drivingly connected to said first drive means for causing rotation thereof about said first axis;
- second power means drivingly connected to said second drive means for causing rotation thereof about said second axis;
- and
- said first and second means each being reversible and operate independently of one another whereby said first and second power means are capable of selectively rotating said first and second drive means in opposite directions simultaneously at selected times and in the same direction simultaneously at other selected times.
4 more elements
Dependencies are inferred from the claim text.