Synthetic resin bellows pipe

Details Synthetic resin bellows pipe Synthetic resin bellows pipe

1994-12-28

1996-04-16

Simone, Timothy F.

Pipes and tubular conduits

Combined

With hose protector

138116, 138121, 138141, 138148, F16L 1112

Patent

active

055073190

ABSTRACT:
The section of a main pipe wall made of synthetic resin material is formed to be substantially triangular and one inclined wall approaches the other inclined wall while the inclined wall goes over a center line passing through a top of both the inclined walls forming the main pipe wall and the approaching posture is capable of being maintained by itself. A second pipe wall, the wall thickness of which is smaller than that of the main pipe wall, is integrally connected with the inside of the pipe main wall, the section of the second pipe wall is substantially triangular, a bottom of the second pipe wall and predetermined portions of both the inclined walls at the bottom side adhere to a bottom of the main pipe wall and both the inclined walls, and a small space is formed between a top of the second pipe wall and the top of the main pipe wall.

REFERENCES:
patent: 3090403 (1963-05-01), Kroekel
patent: 3201861 (1965-08-01), Fromson et al.
patent: 4081190 (1978-03-01), Itzler
patent: 4415764 (1983-11-01), Priaroggia et al.
patent: 4424834 (1984-11-01), Sumi et al.
patent: 4773458 (1988-09-01), Touzani
patent: 4852564 (1989-08-01), Sheridan et al.
patent: 4921147 (1990-05-01), Poirier
patent: 5311753 (1994-05-01), Kanao

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