Engine compartment casing element with perforated foam layer

Details Engine compartment casing element with perforated foam layer Engine compartment casing element with perforated foam layer

1993-12-02

1997-05-27

Watkins, William

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428131, 428116, 428 71, 428 72, 428 73, 428198, 428158, 428178, 428166, 428213, 428220, 428338, 428332, 4283144, 4283193, 4283188, 181294, 181204, 181288, 181290, 181291, 181292, 296 393, 123198E, 123195C, B60R 1308, B32B 324, E04B 186

Patent

active

056330677

ABSTRACT:
An engine compartment casing element (1), in particular for sound absorption, with a foamed material element (2) attached to a wall element (3) which is preferably reverberant, the foamed material element (2) having a skin-like covering (5) on the side facing away from the wall element (3). The foamed material element (2) is perforated, the foamed material element (2) is also covered on both sides with an air-impermeable plastic sheeting (5) or (6) respectively which also covers the perforated areas (holes 4), and the foamed material element (2) is installed so that it runs at least in part at a distance (a) from the wall element (3).

REFERENCES:
patent: 2087248 (1937-07-01), Fischer
patent: 2990027 (1961-06-01), Sabine
patent: 3905443 (1975-09-01), Sieuzac
patent: 3966526 (1976-06-01), Doerkling
patent: 4013302 (1977-03-01), Oswald
patent: 4248647 (1981-02-01), Herron et al.
patent: 4253543 (1981-03-01), Johansson
patent: 4301890 (1981-11-01), Zalas
patent: 4340129 (1982-07-01), Salyers
patent: 4469736 (1984-09-01), Machhholz
patent: 4584232 (1986-04-01), Frank et al.
patent: 4782913 (1988-11-01), Hoffmann et al.
Kurtze, "Physik und Yechnik der harmbek ampting" (1964) G. Braun, Karlsruhe, Germany p. 159.

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