Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2005-11-01
2005-11-01
San Martin, Edgardo (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S279000, C181S238000, C181S239000, C181S275000, C060S314000
Reexamination Certificate
active
06959782
ABSTRACT:
A tuned exhaust system for small two cylinder engines, the exhaust system including a pair of exhaust passage through which exhaust gasses pass. The exhaust passages are dimensioned to providing a tuning effect to the exhaust gasses for enhanced engine performance. The exhaust passages are not straight and elongated, but rather are sprialed, scrolled, coiled, or otherwise folded upon themselves at least twice. In this manner, the exhaust passages may be housed at least in part within a muffler having a significantly reduced overall size or profile, such that the muffler may be used in small engines.
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Brower David R.
Mason John R.
Baker & Daniels
Martin Edgardo San
Tecumseh Products Company
LandOfFree
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