Pipe wall segment and pipe having sidewall

Details Pipe wall segment and pipe having sidewall Pipe wall segment and pipe having sidewall

1995-10-25

1998-03-17

Scherbel, David

Pipes and tubular conduits

Flexible

Spirally wound material

138154, 138172, 138177, 138148, F16L 1124

Patent

active

057275980

ABSTRACT:
An improved pipe construction is disclosed having an inner and outer surface, intermediate walls having a top and bottom, and a plurality of primary internal cells. Each of the primary internal cells has a cell surface wall, collapsible ribs attached to the intermediate walls, collapsible apertures positioned on opposite sides of the intermediate walls and apertures, and internal flanks. Each of the collapsible apertures has an inner wall surface, with each inner wall surface having a deformable surface portion. Each of the end apertures is positioned between the collapsible apertures and primary internal cells. Each of the end apertures has an inner wall surface. The internal flanks are positioned intermediate the end apertures and the collapsible apertures. A method of forming the pipe of this structure is also disclosed.

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"Large Bore Helidur Spiral Sewer Pipes Made of uPVC 100 or HDPE" by A. G. Petzetakis S.A.--Sep. 1983.

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