Marine engine noise suppressor

Details Marine engine noise suppressor Marine engine noise suppressor

1997-06-20

1998-12-08

Sotelo, Jesus D.

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

181238, B63H 2132

Patent

active

058461078

ABSTRACT:
An exhaust system in a boat for an internal combustion engine in the boat with the conventional round exhaust manifold of the engine connected by a rectangular cross sectional exhaust pipe to an exhaust chamber. Within the exhaust chamber is a vacuum wedge having a top plate with a vertical opening therein with the top plate being connected at its forward end to the front wall of the exhaust chamber and its rearward end connected at its laterally edges to the hull at the junction of the transom and bottom of the hull and the rearward end portion, intermediate the lateral edges connected to the transom. The sides of the top plate being connected by side walls to the hull bottom. An opening is formed in the hull bottom and extends laterally between these side walls and from the transom forward to overly half of the vertical opening in the top plate so that the exhaust chamber is vented through the vacuum wedge when the boat is on plane. When not on plane, low speed exhaust pipes connect the exhaust chamber to the outside of the hull above the water line.

REFERENCES:
patent: 4002136 (1977-01-01), Michalak
patent: 4977977 (1990-12-01), Von Widmann et al.
patent: 5094640 (1992-03-01), Burdick et al.

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