Drainage pipe

Details Drainage pipe Drainage pipe

F - Mech Eng,Light,Heat,Weapons

16

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F16L 9/12 (2006.01) E02B 11/00 (2006.01) E02B 13/00 (2006.01) E02D 19/00 (2006.01)

Patent

CA 2103686

ABSTRACT OF THE DISCLOSURE The invention pertains to a three-walled drainage pipe made of plastic, which may be used as a multi-purpose or partial drainage pipe, a smooth-walled inner pipe being surrounded by a corrugated pipe and welded to its wave troughs and having slit-like openings for the passage of drainage liquid, and in turn the corrugated pipe being surrounded by an outer pipe which is indented into the wave troughs and perforated only in the pipe crown area of the openings, the remainder of the outer pipe being smooth. The addition of an outer pipe provides better rigidity and increases the crushing strength while simplifying manufacture and making it cheaper.

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