Sound attenuating device and insert

Details Sound attenuating device and insert Sound attenuating device and insert

1993-09-01

1995-05-09

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181265, 181275, 181281, 181282, F01N 108

Patent

active

054131898

ABSTRACT:
A sound attenuating muffler useful with an internal combustion engine, preferably for marine applications, contains an insert comprising an arrangement of annular sound reflecting surfaces defining an inner chamber into which engine exhaust gases flow in a first direction and one or more directors to divert the axial flow of gases and sound waves in a second direction past these sound reflecting surfaces. As the sound waves are reflected off of these surfaces back into the muffler interior, attenuation of the sound is achieved. The gases exit the muffler to the atmosphere through an outer chamber surrounding the inner chamber. A method of assembling the component parts of the insert is also described.

REFERENCES:
patent: 981584 (1911-01-01), Miller
patent: 4424882 (1984-01-01), Moller
patent: 4643272 (1987-02-01), Gaffrig
patent: 4809812 (1989-03-01), Flugger

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