Propulsion apparatus for watercraft
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United States of America Patent
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Dec 7, 2021
Grant Date -
N/A
app pub date -
Jul 29, 2020
filing date -
Jul 29, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A watercraft propulsion apparatus includes an eccentric crank assembly operatively connected to a pair of fins adapted to sweep back and forth in a generally transverse direction relative to a longitudinal axis of the watercraft. The fins may be rotatable about a longitudinal shaft fixedly secure to the bottom of the hull of the watercraft. A drive linkage assembly operatively connecting the eccentric crank assembly to the pair of fins imparts a torque force to oscillate the pair of fins. The oscillating fins provide a propulsive force to propel the watercraft longitudinally forward during both oscillating directions of the fins as they sweep back and forth.
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