Exhaust device for engine

Details Exhaust device for engine Exhaust device for engine

2011-07-05

2011-07-05

Phillips, Forrest M (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S227000, C181S212000

Reexamination Certificate

active

07971682

ABSTRACT:
An exhaust device for an engine cam include a flow rectifying device for rectifying a flow of an exhaust gas. The flow rectifying device is disposed in an upstream end of an inner pipe, and comprises protrusions projecting inwardly. The exhaust gas engaging the flow rectifying device has passed through a curved portion of the inner pipe. The inner pipe also includes a muffler having a plurality of vent holes disposed in an inner portion thereof, and an outer pipe surrounding the inner pipe, defining an angular chamber therebetween.

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patent: 2008/0053748 (2008-03-01), Emler
patent: 2001-227336 (2001-08-01), None

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