Flexible insulated duct and the method of making the duct
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16L-009/14
출원번호
US-0123907
(1998-07-28)
발명자
/ 주소
Gross Stephen Edward
Peterson Michael Dean
Bogrett Blake Boyd
출원인 / 주소
Johns Manville International, Inc.
대리인 / 주소
Touslee
인용정보
피인용 횟수 :
21인용 특허 :
5
초록▼
An insulated air duct includes a flexible, reinforced, inner tubular core; a layer of partially compressed flexible, resilient fibrous insulation surrounding the core; and a flexible jacket, preferably with a longitudinally extending seam, spaced outwardly from the core and enveloping the layer of p
An insulated air duct includes a flexible, reinforced, inner tubular core; a layer of partially compressed flexible, resilient fibrous insulation surrounding the core; and a flexible jacket, preferably with a longitudinally extending seam, spaced outwardly from the core and enveloping the layer of partially compressed fibrous insulation. The layer of partially compressed fibrous insulation is formed from a resilient blanket of air laid, randomly oriented, entangled fibers. The resilient blanket may have a low binder content or be binderless with the fibers unbonded and, possibly, lubricated. The lubricant on the fibers facilitates the sliding of the fibers relative to each other, reduces fiber attrition due to abrasion as the fibers move relative to each other; and enhances the resilience of the blanket when subjected to compression whereby the layer of compressed fibrous insulation surrounding the core remains expanded in its partially compressed state, to the extent permitted by a space between the core and the jacket, to provide the duct with good insulating properties and to exert an outward pressure on the jacket to improve the appearance of the jacket. Preferably, the resilient blanket is wrapped about the core while being supported on the jacket so that the blanket will not pull apart during the wrapping process.
대표청구항▼
[ What is claimed is:] [9.] A flexible, insulated air duct comprising:a flexible, reinforced, inner tubular core; a layer of partially compressed flexible fibrous insulation surrounding the inner tubular core; and a flexible, limp vapor barrier jacket spaced outwardly from the inner tubular core and
[ What is claimed is:] [9.] A flexible, insulated air duct comprising:a flexible, reinforced, inner tubular core; a layer of partially compressed flexible fibrous insulation surrounding the inner tubular core; and a flexible, limp vapor barrier jacket spaced outwardly from the inner tubular core and enveloping the layer of partially compressed fibrous insulation; andthe layer of compressed flexible fibrous insulation comprising a resilient blanket of air laid, randomly oriented, entangled, glass fibers which are not bonded at their points of intersection; the resilient blanket having an uncompressed density between about 0.35 pcf and about 0.85 pcf and the layer of compressed fibrous insulation having a density between about 0.5 pcf and about 1.6 pcf; the glass fibers having a lubricant thereon to facilitate the sliding of the fibers relative to each other, reduce fiber attrition due to abrasion as the fibers move relative to each other; and enhance the resilience of the blanket when subjected to compression whereby the layer of partially compressed fibrous insulation surrounding the inner tubular core fills and remains expanded in its partially compressed state, to the extent permitted by a space between the inner tubular core and the vapor barrier jacket, to provide the duct with good insulating properties and to exert an outward pressure on an inner surface of the vapor barrier jacket to provide the air duct with a good appearance.
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이 특허에 인용된 특허 (5)
Botsolas Christos John (Rumson NJ) Kostecki Ronald (Neshanic Station NJ), Curvable fibrous thermal insulation.
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