Marine propulsion – Means for accomodating or moving engine fluids – Means for handling exhaust gas
Reexamination Certificate
2007-12-11
2009-11-24
Olson, Lars A (Department: 3617)
Marine propulsion
Means for accomodating or moving engine fluids
Means for handling exhaust gas
Reexamination Certificate
active
07621792
ABSTRACT:
An outboard motor has a construction in which the area of an exhaust passage can be secured easily and exhaust noise is less likely to escape into the air, allowing the exhaust noise to be lowered. The outboard motor includes a lower case, a propeller shaft rotatably supported in the lower case, a propeller fixed to the propeller shaft, an engine, and a power transmission mechanism through which a driving force from the engine is transmitted to the propeller shaft to rotate the propeller. An exhaust case is provided in the lower case. The exhaust case includes an upper exhaust passage above the propeller shaft, the upper exhaust passage directing therethrough an exhaust gas from the engine, an exhaust outlet which is open in a rearward direction of the propeller shaft, and a communication exhaust passage arranged to communicate the upper exhaust passage with the exhaust outlet.
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Fukuoka Yoshihito
Nakamura Daisuke
Keating and Bennett, LLP
Olson Lars A
Venne Daniel V
Yamaha Hatsudoki Kabushiki Kaisha
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