Marine propulsion – Means for accomodating or moving engine fluids – Means for handling exhaust gas
Patent
1990-12-14
1992-03-10
Sotelo, Jesus D.
Marine propulsion
Means for accomodating or moving engine fluids
Means for handling exhaust gas
114362, 181235, B63H 2132
Patent
active
050946404
ABSTRACT:
Sound muffling devices for marine engines for installation on the external portion of the transom of a marine vessel are attached in such a manner that any breakdown within the silencer causes no discharge of exhaust gases or cooling fluids into the interior of the vessel and the gases and cooling fluid continue to be discharged overboard. The silencers are designed to reduce, substantially, the noise level emitted by the engine under operation by the efficient mixture of gases and water through a series of baffles, with low resistance to gas flow that does not diminish engine efficiency. At high speeds the gases and odors are emitted from the vessel at the centerline with distance and direction such as to reduce, substantially, emissions into the air environment. The device receives exhaust gas and cooling water from an exhaust pipe passing through the transom at the side of the boat and directs the gas athwart the boat to the center where it is exhausted. At low speeds the gas is exhausted at lateral openings at a distance from the transom. These by-pass openings tend to close off at high speed, directing the exhaust to the center, lower openings. The devices are provided in pairs with a central member that may be cut to length to fit between the pair to adapt to any width of boat. The device is designed to be used in pairs, with one for each of a pair of engines mounted side by side with an integral swim platform for its upper surface.
REFERENCES:
patent: 4744778 (1988-05-01), Porter
patent: 4977977 (1990-12-01), Von Widmann et al.
Burdick Gregory N.
Parenti Robert V.
Blum Alvin S.
Sotelo Jesus D.
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