Plastic pipe comprising an outer corrugated pipe and a smooth in

Details Plastic pipe comprising an outer corrugated pipe and a smooth in Plastic pipe comprising an outer corrugated pipe and a smooth in

1989-09-01

1991-10-29

Bryant, III, James E.

Pipes and tubular conduits

Repairing

Patches

130105, 405150, F16L 5518

Patent

active

050606964

ABSTRACT:
A plastic pipe consisting of an outer corrugated plastic pipe and an inner smooth wall consisting of a wear resistant elastomer, particularly a thermoplastic rubber fixed in the inner bottoms wave valleys to said outer corrugated pipe. The inner wall consists of a pipe which has been coextruded with the outer corrugated pipe so that the inner and outer pipe are heat welded to each other.
The cavities between the inner pipe and the corrugations may be filled with a foam plastic.
This plastic pipe is used for repairing or renewing a sewage pipe by installing such a pipe from a vertical shaft of the sewage system into the sewage pipes. The interstices between the outer side of the corrugations and the inner side of the sewage pipe may be filled with a mortar.

REFERENCES:
patent: 2898941 (1959-08-01), Kilcup
patent: 3550639 (1970-12-01), Okuda
patent: 3640312 (1972-02-01), Bauman
patent: 3665967 (1972-05-01), Kachnik
patent: 4037626 (1977-07-01), Roberts, Jr.
patent: 4269234 (1981-05-01), Johnson et al.
patent: 4303104 (1981-12-01), Hegler et al.
patent: 4312383 (1982-01-01), Kleykamp
patent: 4487232 (1984-11-01), Kanao
patent: 4754781 (1988-07-01), de Putter

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