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US 5,659,158 AGranted
Sound attenuating device and insert
AssigneeJ. B. Design, Inc.
InventorsJames R. Browning, Gerald A.. Carek
Life of this patent
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AssigneeJ. B. Design, Inc.
InventorsJames R. Browning, Gerald A.. Carek
Estimating the term…
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. One or more additional inserts may be placed downstream from the first insert for additional sound attenuation. Each of the inserts may be in the form of discrete sound reflector rings or as a continuous helix. A method of assembling the component parts of the insert is also described.
A muffler useful for attenuating the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising an elongated axially extended housing, an inner chamber, an annular outer chamber radially surrounding said inner chamber, a reflector core separating said inner and outer chambers, the inner chamber including an inlet through which exhaust gases flow into said muffler in an axial direction and at least one frusto-conical flow director for redirecting the flow of exhaust gases from said axial direction to a generally radially outward direction, said reflector core including at least one open passageway for the flow of exhaust gases radially outwardly fore the inner chamber into the outer chamber and at least one planar reflection surface extending into said open passageway at an angle whereby sound waves accompanying the exhaust gases are reflected from said one planar surface back into the inner chamber to cause attenuation of the sound waves.
A muffler for attenuating the sounds of exhaust gases emitted from an internal combustion engine, said muffler comprising:
A muffler useful for attenuating the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising an elongated axially extended housing having an inlet through which exhaust gases enter the muffler in an axial direction, and an outlet through which the exhaust gases are discharged from the muffler, an inner chamber, an outer chamber radially surrounding said inner chamber and an annular reflector core separating the inner chamber from the outer chamber, the inner chamber containing at least one flow director to redirect the incoming exhaust gases from an axial direction to a radially outwardly direction, the annular reflector core comprising a sound reflector surface positioned radially outwardly of said at least one flow director, forming a helix containing a plurality of loops spaced from one another thereby forming an open passageway between adjacent loops, said sound reflector surface extending into the open passageway at an angle that causes sound waves to reflect from said sound reflector surface back into the inner chamber to cause attenuation of the sound.
In a muffler useful for attenuating the sound of an internal combustion engine, said muffler including an axially extending housing having an inlet adapted to be connected to an exhaust pipe in communication with said engine and a gas outlet, the improvement comprising:
Dependencies are inferred from the claim text.