Document Type and Number:
Japanese Patent JPH0253676
Kind Code:
B2
Abstract:
A plastics pipe (1) comprises an inner wall (6) and an outer wall (5), being integral with longitudinal partitions (4) between them and bounding longitudinally extending channels (3) and a circumferential, helically or non-helically extending groove (10, 11, 12). The groove has been formed by closing the channels by pressing channel wall parts onto each other. A retaining ring (15) may be snapped into an external groove (10).
Inventors:
ROEROFU HERUMAN MARITSUSEN
YOANESU HENDORIKUSU BYUUNE
YOANESU HENDORIKUSU BYUUNE
Application Number:
JP615182A
Publication Date:
November 19, 1990
Filing Date:
January 20, 1982
Export Citation:
Assignee:
WAVIN BV
International Classes:
B32B1/08; B29C57/00; B29C67/00; F16L9/12; F16L47/06
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