In line insertion muffler for marine engines

Acoustics – Sound-modifying means – Muffler – fluid conducting type

Patent

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Details

181232, 181235, 181564, F01N 708, F01N 712

Patent

active

054441960

ABSTRACT:
An improved muffler for silencing the exhaust emitted from a water cooled marine engine employing a first housing encompassing a second housing which is partitioned by an angularly disposed inner planar baffle further having an inlet for exhaust gas and cooling water to fluidly communicate into an inlet chamber of the second housing resulting in a diminution in flow velocity so as to attenuate the exhaust noise, the exhaust gas and cooling water exiting the inlet chamber through an aperture fluidly communicated therewith into a silencing volume formed by an area between the first and second housing and forced through an aperture into an outlet chamber of said second housing. The outlet chamber acting as a back flow preventor.

REFERENCES:
patent: 1732818 (1929-10-01), Oldberg
patent: 3296997 (1967-01-01), Hoiby et al.
patent: 3545565 (1970-12-01), McCaffrey, Jr.
patent: 3642094 (1972-02-01), Yancey
patent: 4002136 (1977-01-01), Michalsk
patent: 4315558 (1982-02-01), Katayama
patent: 4450934 (1984-05-01), Davis
patent: 4713029 (1987-12-01), Ford

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