Sound-insulated flow duct and process for the manufacture thereo

Details Sound-insulated flow duct and process for the manufacture thereo Sound-insulated flow duct and process for the manufacture thereo

1983-05-24

1986-10-07

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181286, 181290, 181291, 181294, E04F 1704, F01N 124

Patent

active

046154116

ABSTRACT:
A sound-insulated flow duct is provided with walls made up of a composite of an elastic thermoplastic, predominantly closed-cell foam material as the outer layer and an open-cell, elastic soft foam material as the inner layer.

REFERENCES:
patent: 3000464 (1961-09-01), Watters
patent: 3196975 (1965-07-01), Voelker
patent: 3582095 (1971-06-01), Chalet du Dyck
patent: 3741844 (1973-06-01), Schwartz
patent: 3954537 (1976-05-01), Alfter et al.
patent: 4236597 (1980-12-01), Kiss et al.
patent: 4340129 (1982-07-01), Salyers
patent: 4432580 (1984-02-01), Lohmar et al.
patent: 4436179 (1984-03-01), Yamamoto et al.
"New Polyethylene Foams", Kunststoffe, vol. 61, 1971, No. 10, pp. 745-749.

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