Exhaust system for small-sized boat

Details Exhaust system for small-sized boat Exhaust system for small-sized boat

2007-01-02

2007-01-02

Swinehart, Ed (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

Reexamination Certificate

active

10791361

ABSTRACT:
An exhaust system for a small-sized boat which can efficiently reduce exhaust noises in a low frequency band includes a water muffler provided at one location along exhaust pipes extending from an engine disposed in a boat body. The inside of the water muffler is divided into a single expansion chamber and a resonator chamber, and a front exhaust pipe coupled to the engine and a rear exhaust pipe opened to the outside of the boat are connected to the expansion chamber. Between the front exhaust pipe opened to the inside of the expansion chamber and the rear exhaust pipe, a water-controlling plate is provided in an upper side of the expansion chamber.

REFERENCES:
patent: 4019456 (1977-04-01), Harbert
patent: 4124092 (1978-11-01), Kajiya et al.
patent: 4416350 (1983-11-01), Hayashi
patent: 5464357 (1995-11-01), Craig et al.
patent: 6764361 (2004-07-01), Matsuda
patent: 08119196 (1996-05-01), None
patent: 10212936 (1998-08-01), None

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