Reinforced thermoplastic duct
AssigneeTechnifab, Inc.
InventorsBradley J. Bauchmoyer, Bruce D. Whitman
Life of this patent
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Abstract
A reinforced duct system includes at least a first thermoplastic duct section and a stiffening ring affixed to the first thermoplastic duct section. The stiffening ring includes first and second thermoplastic core rings, an inner reinforcement strip adhered to and spanning adjacent interior surfaces of the first and second core rings, an outer reinforcement strip adhered to and spanning adjacent exterior surface of the first and second core rings, and a flat reinforcement ring interposed between the first and second core rings.
Claims20
A reinforced duct system comprising:
- at least a first thermoplastic duct section;
- and
- a stiffening ring affixed to the first thermoplastic duct section, the stiffening ring comprising first and second thermoplastic core rings, an inner reinforcement strip adhered to and spanning adjacent interior surfaces of the first and second core rings, an outer reinforcement strip adhered to and spanning adjacent exterior surface of the first and second core rings, and a flat reinforcement ring interposed between the first and second core rings.
A duct stiffening ring comprising:
- first and second thermoplastic core rings;
- an inner reinforcement strip bonded to and spanning adjacent interior surfaces of the first and second core rings;
- an outer reinforcement strip bonded to and spanning adjacent exterior surfaces of the first and second core rings;
- and
- a flat reinforcement ring interposed between the first and second core rings.
A method of constructing a reinforced duct system, the method comprising:
- providing a first thermoplastic duct section and a second thermoplastic duct section each having a first tensile/compression strength;
- and
- thermally bonding a stiffening ring between the first and second thermoplastic duct sections, the stiffening ring having a second tensile/compression strength greater than the first tensile/compression strength.
Dependencies are inferred from the claim text.