Muffler for an internal combustion engine

Details Muffler for an internal combustion engine Muffler for an internal combustion engine

1987-06-08

1989-05-30

Fuller, B. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181255, 181282, F01N 110

Patent

active

048342149

ABSTRACT:
A muffler for use with an internal combustion engine or the like having improved attenuation capabilities together with lower back pressure. The muffler has an elongated outer casing and an inner casing, the tubular ends of which extend beyond the outer casing for inlet, and outlet conducts. The central portion of the inner casing forms a continuation between the ends and has a differently configured but substantially equal cross-sectional area as the ends. The outer casing forms a sealed relationship with the inner casing adjacent the ends thereof. The central body portion is configured to have a portion in contact with the outer casing and a portion spaced from the outer casing. The surface of the spaced portion is perforated and sound absorption material is positioned in the space between the inner and out casing.

REFERENCES:
patent: 1922848 (1933-08-01), Harley
patent: 1934462 (1933-11-01), Hartsock
patent: 2046193 (1936-06-01), Spicer
patent: 2826261 (1958-03-01), Eckel
patent: 4239091 (1980-12-01), Negrao
patent: 4632216 (1986-12-01), Wagner et al.
patent: 4671381 (1987-06-01), Rascov
patent: 4674594 (1987-06-01), Jensen
patent: 4690245 (1987-09-01), Gregorich et al.

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