Human powered watercraft

Marine propulsion – Operator powered drive for propelling means – Lever with connecting linkage

Reexamination Certificate

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Reexamination Certificate

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08043134

ABSTRACT:
A watercraft having a deck is configured with a first rocker having graspable input arm above-deck and a lower output arm, the first rocker being pivoted to the craft, the output arm connecting a push-bar at a first end and the push-bar having a second end connecting a second rocker, the second rocker having input and output arms, the output arm of the second rocker having a propelling fin, the second rocker being pivoted to the watercraft. The watercraft may have a third rocker, fin, and pivot, and more. Users stand upon deck, grasp the first rocker's input arm and vertically thrust the rocker to propel.The invention further comprises a device for human powered propulsion remove-ably attachable to watercrafts, especially small boats, and surfboards, and for propelling them from a standing position by human power.

REFERENCES:
patent: 3154046 (1964-10-01), McLean
patent: 6022249 (2000-02-01), Ketterman
patent: 6890226 (2005-05-01), Wang
patent: 7232350 (2007-06-01), Krah
patent: 7267586 (2007-09-01), Murphy
patent: 7637791 (2009-12-01), Ketterman et al.

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