Sound absorption device or muffler for blow nozzles

Details Sound absorption device or muffler for blow nozzles Sound absorption device or muffler for blow nozzles

1990-01-05

1991-08-06

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

138 42, F01N 124

Patent

active

050369482

ABSTRACT:
A sound absorption device for a blow nozzle formed with a bore extending from a low-pressure side of the nozzle, at which a gas flow enters the nozzle, to a high-pressure side of the nozzle, at which the gas flow streams from the nozzle through a nozzle opening formed at an end of the bore, includes a sound-absorbing insert for muffling noise which results from a variation in density of the gas flow as it streams through the nozzle opening and has frequencies ranging over substantially the entire audible frequency range, the sound-absorbing insert being shaped as a truncated cone and being rigidly set into the bore formed in the blow nozzle, with the smaller face of the truncated cone being disposed directly at the nozzle opening, the sound-absorbing insert being a rigid structure formed of sintered bronze spheres having a power grain-size.

REFERENCES:
patent: 1554534 (1925-09-01), Streussler
patent: 1627324 (1927-05-01), Green
patent: 2805685 (1957-09-01), Jopson
patent: 3677300 (1972-07-01), King
patent: 3823743 (1974-07-01), King

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