Silencer in gas flow passage

Details Silencer in gas flow passage Silencer in gas flow passage

1981-07-06

1982-06-29

Miller, Jr., George H.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181270, E04F 1704, F01N 110

Patent

active

043368638

ABSTRACT:
The invention relates to an improvement of a silencer arranged in a gas flow passage of a gas supply or exhaust system and includes a sound absorbing material lined on wall surfaces of the gas flow passage in a duct casing. According to the invention, the sound absorbing material is covered with guard plates, each provided with a number of sound absorbing apertures and oblique plates located at edges of the apertures, for preventing gas flow from entering the sound absorbing material. The silencer according to the invention is capable of preventing accumulation of dust on the sound absorbing material and eliminating damage to the sound absorbing material due to entering of the gas flow thereinto. Thus, the silencer is particularly useful to diminish noise which is caused by gas flow when the gas contains a great amount of dust or when the gas flows at a high speed.

REFERENCES:
patent: 3841434 (1974-10-01), Culpepper, Jr.
patent: 4274506 (1981-06-01), Blomgoen et al.

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