Muffler structure

Details Muffler structure Muffler structure

2007-05-25

2010-06-15

Donels, Jeffrey (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S228000, C181S252000, C181S256000, C181S212000, C060S299000

Reexamination Certificate

active

07735602

ABSTRACT:
A muffler structure capable of suppressing generation of abnormal noise in the muffler even when the outer and the inner tubes expand thermally. Provided is a double-pipe muffler structure including an inner tube and an outer tube. In the muffler structure, an annular front step portion and an annular rear step portion are formed in the inner tube, while the step portions is brought into contact, from inside, with the outer tube and thus are supported by the outer tube. The outer tube supports the front and the rear step portions by being brought into close contact with the step portions partially and elastically.

REFERENCES:
patent: 3354986 (1967-11-01), Griffin et al.
patent: 3752260 (1973-08-01), Heath
patent: 4589515 (1986-05-01), Omura
patent: 5873710 (1999-02-01), Tucker
patent: 6941751 (2005-09-01), Yamamoto et al.
patent: 2695430 (1994-03-01), None
patent: 2006-70705 (2006-03-01), None

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