Fin for oscillating foil propulsion system
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United States of America Patent
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-
Aug 15, 2017
Grant Date -
Feb 25, 2016
app pub date -
Oct 14, 2015
filing date -
Aug 8, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A watercraft having propulsion means extending below the water line comprising a pair of flexible fins each adapted to oscillate through an arcurate path in a generally transverse direction across the central longitudinal dimension of the watercraft. As input force is applied, the fins twist to form an angle of attack for providing forward thrust while moving in both directions along the arcurate path. Each of the fins have a generally squared off top and preferably an outer area of harder rubber than the inner area. Each of the fins can be adjusted at the trailing edge to provide adjustable tensioning of the trailing edge.
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