Shell main body for muffler

Details Shell main body for muffler Shell main body for muffler

2008-04-29

2008-04-29

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S227000, C181S247000, C181S249000, C181S250000, C181S255000, C181S266000, C181S269000, C181S272000, C181S273000, C181S276000

Reexamination Certificate

active

11208560

ABSTRACT:
The shell main body for a muffler includes an inner shell in a cylindrical shape with a cross-section of an imperfect circle defined by small arc portions alternating with large arc portions; and an outer shell wrapping the inner shell and formed in a cylindrical shape similar to the inner shell. An end portion of the inner shell and an end portion of the outer shell are overlapped in a circumstantial direction of the shell main body to form a shell overlap portion that is capable of discharging vapor in a gap of the large arc portions formed between the inner shell and the outer shell into one of an outside and an inside of the shell main body. This shell overlapping portion is located in one of the small arc portions.

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patent: 09287431 (1997-11-01), None
patent: 2002-206422 (2002-07-01), None

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