Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-11-20
2007-11-20
San Martin, Edgardo (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S269000, C181S231000, C060S299000, C060S302000, C060S322000
Reexamination Certificate
active
11094485
ABSTRACT:
A muffler having a muffler body divided into first and second exhaust chambers by a partitioning member which has a third exhaust chamber formed therein. An exhaust inlet introduces exhaust gas from an engine into the first exhaust chamber. First communication bores provide communication between the first and second exhaust chambers, and second communication bores provide communication between the second exhaust chamber and the third exhaust chamber. The third exhaust chamber is open to the atmosphere through an exhaust outlet pipe. An exhaust emission control catalyst is carried on an outer surface of the partitioning member facing the first and second exhaust chambers, as well as on an inner surface of the partitioning member facing the third exhaust chamber. An inner surface of the muffler body does not carry the exhaust emission control catalyst.
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Chiba Shosaku
Ohno Syuji
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