Muffling device for outboard propulsion machine

Details Muffling device for outboard propulsion machine Muffling device for outboard propulsion machine

1993-07-26

1997-08-26

Swinehart, Edwin L.

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

440900, B63H 2136

Patent

active

056605714

ABSTRACT:
Two embodiments of silencing devices for a marine propulsion unit that include an engine surrounded by a protective cowling and which is adapted to be detachably connected to the hull of the watercraft. The silencing devices include at least one expansion chamber positioned within the hull and connected to the interior of the protective cowling by a duct. The devices are tuned to silence the noises emanating from the engine which include the induction system noises and/or mechanical noises.

REFERENCES:
patent: 3810526 (1974-05-01), Kawasaki
patent: 4109751 (1978-08-01), Kabele
patent: 4623313 (1986-11-01), Ferguson
patent: 4927392 (1990-05-01), Makihara et al.
patent: 4997398 (1991-03-01), Glen
patent: 5129847 (1992-07-01), Mondek
patent: 5176551 (1993-01-01), Blanchard et al.
patent: 5282764 (1994-02-01), Glen

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