Exhaust muffler

Details Exhaust muffler Exhaust muffler

1978-01-23

1979-07-24

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181237, 181239, 181269, 181278, 1375143, 13751611, 137538, F01N 120, F16K 1700

Patent

active

041619960

ABSTRACT:
An exhaust muffler intended for noise dampening of, for instance, pneumatic tools, comprising a variable flow restricting passage, an attenuation chamber and a non-variable flow restricting passage. A valve body is arranged to control said variable flow restricting passage in response to the actual exhaust gas pressure. A movement dampening chamber, partly defined by the valve body, communicates with the atmosphere through a restriction opening to prevent resonance vibration of the valve body.

REFERENCES:
patent: 541609 (1895-06-01), Hazlehurst et al.
patent: 585084 (1897-06-01), Cook
patent: 1013483 (1912-01-01), Gaa
patent: 1807512 (1931-05-01), Culp
patent: 3219144 (1965-11-01), Murray et al.
patent: 3722854 (1973-03-01), Parola

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