Synthetic resin pipe for underground use

Details Synthetic resin pipe for underground use Synthetic resin pipe for underground use

1986-11-03

1991-09-10

Hornsby, Harvey C.

Pipes and tubular conduits

Flexible

Corrugated

138150, 138153, 174 68C, F16L 1100, F16L 914

Patent

active

050465317

ABSTRACT:
A synthetic resin pipe intended for underground use is disclosed having both an improved strength and flexibility but reduced weight. An inner layer of the body of the pipe is formed of a synthetic resin, and a reinforcing layer is wound around the inner layer. The reinforcing layer is porous, and may be composed of a helically wound punched metal belt, mesh, or the like. An outer layer composed of a helically wound belt of synthetic resin having a high fusibility with the material of the inner layer is formed over the reinforcing layer. A reinforcing rib, forming the corrugations of the pipe, is wound around the outer layer. If desired, the reinforcing rib can be made integral with the belt of the outer layer.

REFERENCES:
patent: 2330651 (1943-09-01), Welger
patent: 3047026 (1962-07-01), Kahn
patent: 3186438 (1965-06-01), Holmgren
patent: 4067362 (1978-01-01), Jackman
patent: 4140154 (1979-02-01), Kanao
patent: 4304266 (1981-12-01), Kutnyak et al.
patent: 4350547 (1982-09-01), Kanao

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