Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1995-06-07
1997-04-01
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181255, 181265, F01N 712
Patent
active
056168934
ABSTRACT:
An improved muffler for silencing the exhaust emitted from a marine engine employing a reverse entry inlet conduit, an attenuation chamber and an outlet conduit whereby exhaust gas and liquid is communicated through the inlet conduit and into the attenuation chamber against the direction of the outlet stream. Upon entering the attenuation chamber exhaust gases and liquids reflect off the inner walls of the chamber and incoming exhaust thereby attenuating exhaust noise until they are finally forced out of the attenuation chamber through the outlet conduit. The reverse entry design of the muffler provides protection against backwardly flowing water that commonly enters a marine exhaust system by orienting the direction of inlet flow at an angle which is greater than 0 degrees but less than 90 degrees relative to the direction of output flow from the muffler.
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patent: 4184566 (1980-01-01), Baker et al.
patent: 4858722 (1989-08-01), Abbe et al.
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