Muffler assembly and method of manufacture

Details Muffler assembly and method of manufacture Muffler assembly and method of manufacture

1988-11-10

1990-11-13

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181264, 181268, 181272, F01N 108

Patent

active

049695371

ABSTRACT:
A muffler assembly includes an inner outlet tube having a tubular portion, a frusto-conical portion and a flange portion having an expanded orifice facing the outlet of an inlet tube. Both the outlet tube and inlet tube extend within a chamber defined in an outer housing. The chamber is divided into two or more subchambers by a baffle which extends between the outlet tube and the housing. One or more holes in the baffle improve the sound attenuation characteristics of the muffler. The invention also comprehends a novel blank used in forming the outlet tube, and three alternative methods which may be used to form the outlet tube.

REFERENCES:
patent: 3672464 (1972-06-01), Rowley et al.
patent: 4023645 (1977-05-01), Retka et al.
patent: 4325460 (1982-04-01), Hoppenstedt
patent: 4368799 (1983-01-01), Wagner
patent: 4580657 (1986-04-01), Schmeichel et al.
patent: 4632216 (1986-12-01), Wagner et al.

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