Exhaust system for an engine and motorcycle including the...

Details Exhaust system for an engine and motorcycle including the... Exhaust system for an engine and motorcycle including the...

2007-10-05

2009-12-01

Donels, Jeffrey (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S212000, C181S250000, C181S257000, C181S227000

Reexamination Certificate

active

07624842

ABSTRACT:
An exhaust system for an engine that reduces muffler weight, assures a silencing effect and prevents a leak of exhaust gas. A muffler has an inner cylinder disposed in an outer cylinder, and is separated into a plurality of expansion chambers. A communicative passage for communicatively connecting the expansion chambers together is formed between the outer and inner cylinders. Edge parts of the communicative passage contact the outer cylinder and are welded thereto.

REFERENCES:
patent: 4234054 (1980-11-01), Chapin
patent: 5033581 (1991-07-01), Feuling
patent: 5625173 (1997-04-01), Woods
patent: 7374016 (2008-05-01), Yamaguchi et al.
patent: 2005/0067217 (2005-03-01), Hansen
patent: 2008/0110155 (2008-05-01), Harada
patent: 421724 (1991-04-01), None
patent: 06-264741 (1994-09-01), None
patent: 06264741 (1994-09-01), None

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