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US 12,222,128 B2Granted
Sound absorbing duct for environmental control system
AssigneeThe Boeing Company
InventorsBryce A. Vandyke, John Erik West, Douglas D. Maben, Andrew K. Fung, David R. C. Cannal
Life of this patent
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Abstract
A duct includes a rigid air-permeable tube of composite material. The duct also includes a layer of insulation coupled to an exterior surface of the rigid air-permeable tube. The duct further includes a non-rigid insulation layer in contact with the layer of insulation. The non-rigid insulation layer forms an air-impermeable duct wall.
Claims24
A duct comprising:
- a rigid tube of composite material;
- an insulation layer disposed within the rigid tube;
- and
- a biasing member disposed within the rigid tube, the biasing member configured to restrain the insulation layer against an interior surface of the rigid tube, wherein the insulation layer is coupled to the biasing member by the biasing member being threaded through the insulation layer.
1 more element
A method of manufacturing a duct, the method comprising:
- inserting insulation into a rigid tube of composite material to form a layer of insulation within the rigid tube, the layer of insulation in contact with an inner surface of the rigid tube;
- and
- inserting a biasing member into the rigid tube of composite material to secure the layer of insulation within the rigid tube, wherein the layer of insulation is coupled to the biasing member by the biasing member being threaded through the layer of insulation.
Dependencies are inferred from the claim text.