Skinned double wall pipe and apparatus for making same

Details Skinned double wall pipe and apparatus for making same Skinned double wall pipe and apparatus for making same

1996-07-25

1998-09-08

Brinson, Patrick F.

Pipes and tubular conduits

Distinct layers

Bonded to each other

138121, 138137, F16L 1100, F16L 914

Patent

active

058031324

ABSTRACT:
A double wall thermoplastic pipe has a flat inner wall, a corrugated outer wall and a skin of reduced thickness relative to and between the walls. The skin is secured continuously along one of the walls and is secured to the other of the walls at spaced apart locations along the pipe where the pipe walls are adhered to one another by the skin.

REFERENCES:
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patent: 4627844 (1986-12-01), Schmitt
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patent: 5148837 (1992-09-01), Agren et al.
patent: 5284184 (1994-02-01), Noone et al.
patent: 5439454 (1995-08-01), Lo et al.
patent: 5469892 (1995-11-01), Noone et al.
patent: 5560398 (1996-10-01), Pfleger
patent: 5588468 (1996-12-01), Pfleger
patent: 5611373 (1997-03-01), Ashcraft

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