System for fastening insulating layers to a support structure

G - Physics – 10 – K

Patent

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Details

G10K 11/16 (2006.01) B60R 13/02 (2006.01) B60R 13/08 (2006.01) E04B 1/84 (2006.01) F02B 77/13 (2006.01) F16B 5/06 (2006.01)

Patent

CA 2256364

A barrier wall (20) separating a passenger compartment from an engine compartment of a motor vehicle has an acoustical barrier assembly (10) mounted thereto. The acoustical barrier assembly (10) includes a sound barrier layer (12) of a molded construction and sound dampening characteristics. At least one fastener (28) is integrally molded as a single piece with the sound barrier layer (12). The fastener (28) includes a plurality of outer spacer ribs (30) that project laterally from a tube (32) and space an inner surface (24) of the sound barrier layer (12) away from the barrier wall (20). A circumferentially extending flange head (34) is integral with the tube (32) and includes a first frusto-conical section (36) and a second inverse frusto-conical section (38). The annular bases of the first and second sections (36, 38) are integrally formed together while a lower end of the second section (38) is integrally formed with the tube (32), such that insertion of the flange head (34) through a barrier wall aperture (46) requires less force than removal of the flange head therefrom.

Une paroi d'isolation (20) séparant l'habitacle d'un compartiment moteur d'un véhicule automobile comporte un ensemble barrière acoustique (10) monté sur celle-ci. Ledit ensemble barrière acoustique (10) comporte une couche d'isolation phonique (12) moulée, présentant des caractéristiques d'amortissement du bruit. Au moins une attache (28) est moulée d'une pièce avec la couche d'isolation phonique (12). Ladite attache (28) comporte plusieurs nervures d'espacement externes (30) saillant latéralement d'un tube (32) et maintenant une surface interne (24) de la couche d'isolation phonique (12) à une certaine distance de la paroi de séparation (20). Une bride d'extrémité (34) s'étendant sur la circonférence fait partie intégrante du tube (32) et comporte une première partie tronconique (36) et une seconde partie tronconique inversée (38). Les bases annulaires des première et seconde parties (36, 38) forment un bloc alors qu'une extrémité inférieure de la seconde partie (38) fait partie intégrante du tube (32) de sorte que l'insertion de la bride d'extrémité (34) par une ouverture (46) de la paroi d'isolation nécessite moins de force que son retrait.

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