Exhaust muffler for pneumatic tool or machine

Details Exhaust muffler for pneumatic tool or machine Exhaust muffler for pneumatic tool or machine

1975-09-23

1976-09-21

Franklin, Lawrence R.

Acoustics

Auditorium

181 64B, F01N 120

Patent

active

039813770

ABSTRACT:
An exhaust passageway is provided with a sound muffler comprising an orifice, and means operable against a spring in response to sudden increase of fluid exhaust pressure for relatively restricting the orifice thus to abate the sound of exhausting high pressure gas flow. As the gas pressure to be relieved diminishes in a first stage, the spring automatically enlarges the orifice, in effect, whereby the second stage exhausting is rapidly completed at unobjectionable noise level to permit recycling of a pneumatic machine or tool.

REFERENCES:
patent: 837347 (1906-12-01), Smith
patent: 2419664 (1947-04-01), Tabbert
patent: 2884901 (1959-05-01), Chandler et al.
patent: 3254522 (1966-06-01), Elliott et al.
patent: 3330378 (1967-07-01), Waldron
patent: 3635605 (1972-01-01), Hall et al.
patent: 3675732 (1972-07-01), Rosen et al.

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