Marine propulsion – Operator powered drive for propelling means – Rotary cranking arm
Patent
1989-08-02
1990-07-24
Peters, Jr., Joseph F.
Marine propulsion
Operator powered drive for propelling means
Rotary cranking arm
440 26, 114347, B63H 1614
Patent
active
049432516
ABSTRACT:
A pedal operated drive system for a canoe includes a main drive assembly in the canoe including a main drive shaft, an intermediate drive shaft extending rearwardly of the main drive shaft to a point beyond the canoe stern, and a propeller shaft behind the canoe, supported pivotally on the intermediate shaft. A lower region of the propeller shaft, below water when the canoe is afloat, supports a propeller. A series of drive rods including a main drive rod, intermediate drive rod and a propeller drive rod, form a driving engagement between the propeller and a pedal and crank assembly on the main drive assembly, for rotating the propeller responsive to rotating the pedal and crank assembly. Each of the drive rods is rotatably contained within its associated shaft. Universal connections between the rods allow them to be positioned at angles with respect to one another, an obtuse angle between the main drive rod and intermediate drive rod being employed to lower the center of gravity of the drive system. A thrust pad is supported at a chosen vertical location along the propeller shaft, but is slidable on the shaft to permit rotation of the propeller shaft to steer the canoe. A forward face of the thrust pad is V-shaped to facilitate a capture of and self-centering engagement with the canoe, for transmitting the thrust of the propeller to the canoe. For optimal efficiency, the thrust pad is positioned along the stern of the canoe near the water level.
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Lerach Thomas E.
Meron Abraham
Bartz Clifford T.
Peters Jr. Joseph F.
Yamaha Hatsudoki Kabushiki Kaisha
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