Marine propulsion – Operator powered drive for propelling means – Rotary cranking arm
Patent
1992-04-14
1993-06-08
Swinehart, Edwin L.
Marine propulsion
Operator powered drive for propelling means
Rotary cranking arm
440 21, B63H 1618
Patent
active
052173984
ABSTRACT:
A pedal operated catamaran includes a pair of side-by-side buoyant hulls, and a rigid frame releasably mounted to the hulls in one of two alternative positions, to maintain the hulls parallel to one another. The catamaran includes a propeller mounted for rotation with an elongated, longitudinal propeller drive shaft. A gear train drivably associates the propeller drive shaft and a crankshaft, for propeller rotation responsive to rotation of the crankshaft. The propeller drive shaft further is pivotally mounted to allow selective alternative latching of the propeller in a retracted position and in one of several operating positions, as controlled by a hand-operated lever. The latching mechanism allows on-the-fly adjustment of the propeller position. In the retracted position, the propeller is automatically angularly locked above the hulls, to facilitate car top carrying of the craft without disassembly.
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Meron Abraham
Sugita Masanori
Swinehart Edwin L.
Yamaha Hatsudoki Kabushiki Kaisha
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