Fin for oscillating foil propulsion system

Marine propulsion – Oscillating propelling means

Reexamination Certificate

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Details

C440S021000

Reexamination Certificate

active

07637791

ABSTRACT:
A human propelled watercraft having a pair of flexible fins extending into the water each adapted to oscillate through an arcurate path in a generally transverse direction with respect to the central longitudinal dimension of said watercraft. Pedals are provided for applying input force whereby as input force is applied, the flexible fins can twist to form an angle of attack for providing forward thrust with respect to the longitudinal dimension of the watercraft while moving in both directions along the arcurate path. Each of the fins preferably have a generally squared off top and an outer area of harder rubber than the inner area. Preferably, each of the fins is provided with adjustable tensioning at the trailing edge.

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Howe, Peter J., “Penguin power bids to challenge the propeller”, The Boston Globe, May 13, 1997, pp. C1, C2.

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