Silencer with a side branch

Details Silencer with a side branch Silencer with a side branch

1986-02-18

1989-01-31

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181250, F01N 102

Patent

active

048009857

ABSTRACT:
A silencer includes an air passage tube having an air inlet for introducing air thereinto, and a side branch tube connected to the air passage tube and having a closed end for attenuating noise produced by the air introduced into the air passage tube. The side branch tube may be either a flexible tube or have a flexible portion for allowing convenient bending and mounting thereof in the available space. The side branch tube may comprise a pair of different tube portions connected to each other. The side branch tube may have a water drain hole defined in its lowermost portion and preferably the cross-sectional area of the water drain hole is no greater than 1% of the cross-sectional area of the side branch tube. The side branch tube serves to attenuate high-frequency noise and the silencer may additionally include a resonator chamber for attenuating low-frequency noise.

REFERENCES:
patent: 221127 (1879-10-01), Walker
patent: 2096260 (1937-10-01), Pavillon
patent: 2297046 (1942-09-01), Bourne
patent: 3396812 (1968-08-01), Wilcox et al.
patent: 3525419 (1970-08-01), Cassel
patent: 4098298 (1978-07-01), Vohrer
patent: 4350223 (1982-09-01), Takei
patent: 4389982 (1983-06-01), Boyeser
patent: 4578855 (1986-04-01), Van Der Hagan
MTZ Motortechniche, vol. 22, p. 329, Aug. 1961.

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