Plastic pipe

Details Plastic pipe Plastic pipe

1986-07-08

1987-09-01

Marcus, Stephen

Pipes and tubular conduits

Flexible

Corrugated

F16L 904

Patent

active

046901744

ABSTRACT:
This invention relates to a plastic pipe. The wall thickness of this kind of pipes is very small and, consequently, the impact strength is poor. The impact strength of pipes made of polyvinyl chloride can be improved by adding an admixture to the raw material, which, however, increases costs. According to the invention the impact strength can be improved by a ring-shaped elevation formed at the foot of the ribs on both sides thereof, which elevation joins the side wall of the rib over a sharp transitional juncture.

REFERENCES:
patent: 3122171 (1964-02-01), Britton et al.
patent: 3406724 (1968-10-01), Carlstrom et al.
patent: 3500902 (1970-03-01), Habdas
patent: 3861152 (1975-01-01), Maroschak
patent: 4362187 (1982-12-01), Harris et al.
patent: 4566496 (1986-01-01), Menzel et al.

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