Plastic pipe provided with a groove

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

Patent

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Details

138109, 138148, 138115, 285138, 285379, F16J 1510

Patent

active

044285914

ABSTRACT:
A plastic pipe comprises an inner wall and an outer wall, being integral with longitudinal partitions betweem them and bounding longitudinally extending channels and a circumferential, helically or non-helically extending groove, which groove has been formed by closing the channels by pressing channel wall parts onto each other. A retaining ring may be snapped into an external groove.

REFERENCES:
patent: 4341392 (1982-07-01), Dongeren

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