Silencer for exhausting gas streams

Details Silencer for exhausting gas streams Silencer for exhausting gas streams

1976-04-08

1978-04-04

Tomsky, Stephen J.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181230, 181256, 181267, F01N 108, F01N 100, F01N 306

Patent

active

040821609

ABSTRACT:
A silencer for reducing the noise of an exhausting gas stream, comprising a hollow body having a connector, a sound-absorbing insert in the body and an inner component, the sound-absorbing insert comprising at least one split sheet of closed-pore foamed plastic material having a thickness of less than its average pore-size. Advantageously the sheet material comprises closed-pore cross-linked foamed polyethylene stacked or wound to provide about 3 to 30 layers, each layer ranging in thickness from about 0.1 to 1.0 mm, having an average pore diameter from about 0.2 to 2 mm and an air permeability from about 0.5 to 200 Rayl, the air permeability of the innermost layer ranging from about 1 to 4 times the air permeability of the outermost layer.

REFERENCES:
patent: 2764250 (1956-09-01), Jeffords
patent: 3009531 (1961-11-01), Mead
patent: 3688870 (1972-09-01), Gibel
patent: 3715010 (1973-02-01), Gibel
patent: 3882961 (1975-05-01), Cannan et al.

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