US 12,358,627 B2
Acoustic air duct for environmental control system in vehicle
Rachel Ann Bires, Lake Stevens, WA (US); Douglas Dean Maben, Snohomish, WA (US); Christopher Edward Plass, Snohomish, WA (US); Mark Michael Gmerek, Clinton, WA (US); David William Olson, Gold Bar, WA (US); Sonny Keever Nguyen, Mill Creek, WA (US); James Julius Koch, Everett, WA (US); Greta Grace Hadford, Snohomish, WA (US); Bryce Avery Van Dyke, Snohomish, WA (US); and Xin Han, Bothell, WA (US)
Assigned to THE BOEING COMPANY, Arlington, VA (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Oct. 21, 2022, as Appl. No. 17/970,881.
Prior Publication US 2024/0132218 A1, Apr. 25, 2024
Prior Publication US 2024/0228045 A9, Jul. 11, 2024
Int. Cl. B64D 13/00 (2006.01); B32B 1/08 (2006.01); B32B 3/26 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/12 (2006.01); B32B 27/28 (2006.01); B32B 27/42 (2006.01); B32B 37/18 (2006.01); G10K 11/168 (2006.01)
CPC B64D 13/00 (2013.01) [B32B 1/08 (2013.01); B32B 3/266 (2013.01); B32B 5/024 (2013.01); B32B 5/262 (2021.05); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/12 (2013.01); B32B 27/285 (2013.01); B32B 27/42 (2013.01); B32B 37/182 (2013.01); G10K 11/168 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2262/106 (2013.01); B32B 2307/102 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/732 (2013.01); B32B 2597/00 (2013.01); B32B 2605/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustically absorptive environmental control system air duct, the acoustically absorptive environmental control system air duct comprising:
a co-cured air impervious inner layer film, said co-cured air impervious inner layer film comprising an air impervious inner layer first side and an air impervious inner layer second side, said air impervious inner layer first side configured to line the inner wall of the environmental control system air duct;
a co-cured structural middle layer comprising a structural component, said structural middle layer comprising a structural middle layer first side and a structural middle layer second side, said structural middle layer first side positioned adjacent the air impervious inner layer second side, said structural middle layer comprising a plurality of through openings, said plurality of through openings comprising a through opening area representing from about 30% to about 50% of a structural middle layer surface area;
an acoustically absorptive outer layer positioned adjacent the structural middle layer second side;
wherein the structural middle layer is sandwiched between the air impervious inner layer second side and the acoustically absorptive outer layer to form an acoustically absorptive air duct;
a co-cured support ring covered by the co-cured air impervious inner layer film;
a co-cured beaded end at least partially covered by the co-cured air impervious inner layer film; and
wherein the co-cured air impervious inner layer film, the co-cured structural middle layer, the co-cured support ring, and the co-cured beaded end are co-cured together.