Marine propulsion – Operator powered drive for propelling means – Rotary cranking arm
Patent
1999-06-03
2000-07-04
Avila, Stephen
Marine propulsion
Operator powered drive for propelling means
Rotary cranking arm
440 52, B63H 1620
Patent
active
060830611
ABSTRACT:
A nonresonant boat motor for imparting motion to a boat without generating a substantial level of sound. The nonresonant boat motor includes a spiral spring coupled to an axle assembly, a propeller shaft coupled to the axle assembly, a ratchet assembly for providing tension in the spring, and an axle rotation control assembly.
REFERENCES:
patent: 621136 (1899-03-01), Rasmussen
patent: 2273815 (1942-02-01), Bevington
patent: 2360157 (1944-10-01), Olson
patent: 2841000 (1958-07-01), Parks et al.
patent: 3747555 (1973-07-01), Lay
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