Flexible oval duct for heating and cooling systems and method su

Details Flexible oval duct for heating and cooling systems and method su Flexible oval duct for heating and cooling systems and method su

1998-04-29

2000-08-22

Hook, James

Pipes and tubular conduits

Flexible

Spirally wound material

138144, 138154, F16L 11112

Patent

active

061056219

ABSTRACT:
A flexible duct for use in a heating or cooling system having an elongated wire cemented between two elongated plastic ribbons and wound into a multi-turn coil, a portion of the plastic ribbons of each turn overlapping and being cemented to a portion of the plastic ribbons of adjacent turns to form a duct, the wire forming a plurality of identical turns with each turn having a pair of U-shaped end portions and a pair of elongated portions, the elongated portion being interconnected by an end portion and being aligned with the elongated portions of adjacent turns. A method of making such duct and apparatus for making such duct are also disclosed.

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