High performance muffler

Details High performance muffler High performance muffler

2005-05-17

2005-05-17

San Martin, Edgardo (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S255000, C181S269000, C181S272000

Reexamination Certificate

active

06892853

ABSTRACT:
A high performance muffler, e.g., for an internal combustion engine, reduces exhaust or other gas noise while maintaining a low backpressure to prevent engine power loss. A side inlet pipe connects gas to a muffler body. The inlet pipe is flared at its connection to the muffler body to direct flow of the gas through an inlet chamber of the muffler in a spiral path. In an example embodiment, the muffler body includes three chambers separated by panels. An inlet expansion chamber is adjacent to the inlet and includes a first pipe with a perforated portion. An intermediate expansion chamber adjacent to the inlet chamber receives the gas from the first pipe. Four small pipes at the exit end of the intermediate chamber extend into an outlet expansion chamber. The gas in the outlet expansion chamber exits the muffler body by an outlet pipe at the other end of the outlet expansion chamber. The muffler achieves a high sound reduction without increasing backpressure.

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International Search Report dated Jun. 18, 2004.

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