Propulsion device for small boats

Marine propulsion – Oscillating propelling means

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Details

440101, 416 70R, B63H 1604

Patent

active

048102172

ABSTRACT:
A propulsion device for small craft having a shaft, a flexible bag on the shaft at one end, the bag having a larger end which is open and a smaller end with a water flow opening, a cross member extending transversely of the shaft and across the larger bag end, and a spreader device to spread the bag.

REFERENCES:
patent: 678193 (1901-09-01), Peterson
patent: 1197239 (1916-09-01), Sinclair
patent: 1588952 (1925-09-01), Dure
patent: 2534180 (1950-12-01), Raicy
patent: 2628586 (1953-02-01), Hoffman
patent: 2818042 (1957-12-01), Manhart
patent: 3800734 (1974-04-01), Whang
patent: 4578038 (1986-03-01), Lenten

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