Synthetic resin corrugated pipe having a concave-convex surface

Details Synthetic resin corrugated pipe having a concave-convex surface Synthetic resin corrugated pipe having a concave-convex surface

1996-02-13

1998-09-01

Brinson, Patrick F.

Pipes and tubular conduits

Flexible

Corrugated

138122, 138177, 138115, 138155, 285367, F16L 1100

Patent

active

057997039

ABSTRACT:
A synthetic resin corrugated pipe includes a pipe wall having an annularly- or helically-shaped convex-concave surface. The convex-concave surface has a plurality of convex portions having a quadrangular cross-sectional shape and a plurality of concave portions having a circular cross-sectional shape.

REFERENCES:
patent: 2146352 (1939-02-01), Rohrer
patent: 2206286 (1940-07-01), Karmazin
patent: 2563578 (1951-08-01), Candee
patent: 3693664 (1972-09-01), Schmunk
patent: 4275771 (1981-06-01), Campbell, Jr.
patent: 4560320 (1985-12-01), Baus
patent: 4662734 (1987-05-01), Nishi
patent: 4790975 (1988-12-01), Jarvenkyla et al.
patent: 5120083 (1992-06-01), Stine
patent: 5429397 (1995-07-01), Kano

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