Piston engine with counterrotating crankshafts
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United States of America Patent
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Oct 26, 2004
Grant Date -
Sep 30, 2004
app pub date -
Mar 28, 2003
filing date -
Mar 28, 2003
priority date (Note) -
Expired
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Abstract
A multi-cylinder reciprocating-piston engine with two crankshafts located generally end-to-end with respect to each other and with power output ends of the crankshafts located adjacent each other and mechanically interconnected with each other so they rotate at equal speeds but in opposite directions. Pairing of oppositely moving pistons reduces engine vibration. The crankshafts may be coaxial or offset radially from each other. Power from the engine is delivered from the adjacent power output ends of the crankshafts.
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