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US 6,554,665 B1Granted
Exhaust system for watercraft
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorYoshiyuki Kaneko
Life of this patent
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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorYoshiyuki Kaneko
Estimating the term…
A watercraft includes an exhaust system having a connection pipe communicating exhaust gases from an expansion chamber to a water trap. The water trap is positioned generally toward one side of a center line of the watercraft and is angled relative to the center line. A downstream end of the connection pipe opens into a rearward section of the water trap. An exhaust discharge port opens through an upper portion of a forward section of the water trap. The discharge port is closer to the center line than is the downstream end of the connection pipe. An exhaust discharge conduit extends from the discharge port to an exhaust outlet formed through the watercraft hull on an opposite side of the center line from the water trap. In this arrangement, when the watercraft is rolled onto its side, the water trap will prevent water from invading the watercraft engine.
A watercraft comprising a hull defining an engine compartment, an internal combustion engine located within the engine compartment and having an output shaft, a propulsion device carried by the hull and connected to the engine output shaft, and an exhaust system for delivering exhaust gases from the engine to the environment, the exhaust system comprising an expansion chamber, a connection pipe communicating with the expansion chamber, and a water trap device communicating with the connection pipe, the water trap device having a main body having a forward portion and a rearward portion, an enlarged portion being formed in the forward portion of the main body, and a discharge port being formed in an upper portion of the enlarged portion, and a downstream end of the connection pipe opening within the rearward portion of the main body, the connection pipe downstream end positioned farther outwardly from a center line of the watercraft than the discharge port.
A watercraft comprising a hull defining an engine compartment, an internal combustion engine located within the engine compartment and having an output shaft, a propulsion device carried by the hull and connected to the engine output shaft, and an exhaust system for delivering exhaust gases from the engine to the environment, the exhaust system comprising an exhaust expansion chamber, a connecting pipe communicating with the expansion chamber, and a water trap device communicating with the connecting pipe, the water trap device having a discharge tube formed in an upper portion thereof, and a downstream end of the connecting pipe opens within a rearward portion of the water trap so that the connecting pipe downstream end is positioned outwardly from a center line of the watercraft relative to the discharge tube.
A watercraft comprising a hull defining an engine compartment, an internal combustion engine located within the engine compartment and having an output shaft, a propulsion device carried by the hull and connected to the engine output shaft, and an exhaust system for delivering exhaust gases from the engine to the environment, the exhaust system comprising a exhaust pipe and a water trap device communicating with the exhaust pipe, the water trap device having a discharge port communicating with a discharge tube, and a downstream end of the exhaust pipe opens within a rearward portion of the water trap so that the exhausted pipe downstream end is positioned outwardly from a center line of the watercraft relative to the discharge port.
Dependencies are inferred from the claim text.