초록 ▼

A tubular sock made of fibrous material is placed over a louver patch formed in an exhaust flow tube mounted in a muffler to attenuate engine exhaust noise. A slip tube is provided for preventing the tubular sock from becoming entangled on the louver patch as it is being placed on the exhaust flow t

A tubular sock made of fibrous material is placed over a louver patch formed in an exhaust flow tube mounted in a muffler to attenuate engine exhaust noise. A slip tube is provided for preventing the tubular sock from becoming entangled on the louver patch as it is being placed on the exhaust flow tube.

대표청구항 ▼

A noise attenuation apparatus comprising a hollow muffler housing, dividing means in the hollow muffler housing for dividing the muffler housing into at least two muffler chambers, an exhaust tube extending through the dividing means and lying in a mounted position within the muffler housing to inte

A noise attenuation apparatus comprising a hollow muffler housing, dividing means in the hollow muffler housing for dividing the muffler housing into at least two muffler chambers, an exhaust tube extending through the dividing means and lying in a mounted position within the muffler housing to interconnect at least two of the muffler chambers in fluid communication, the exhaust tube having a side wall formed to include a plurality of exhaust openings, and a self-supported open-ended tube sock formed to include an inner wall defining a cylindrical passage extending therethrough and an exposed outer wall spaced from the hollow muffler housing, the tube sock being made of a filter material configured to provide means for attenuating noise of exhaust passed therethrough, the exhaust tube being disposed in the cylindrical passage of the tube sock to position the side wall exhaust openings in confronting relation to the inner wall of the open-ended tube sock so that noise generated by exhaust conducted through the exhaust tube is attenuated as the exhaust exits the exhaust tube through the side wall exhaust openings and passes through the adjacent open-ended tube sock into at least one of the muffler chambers.