F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/47
F16L 58/02 (2006.01) B28B 21/48 (2006.01) F16L 57/00 (2006.01) F16L 58/16 (2006.01)
Patent
CA 1214733
ABSTRACT In a concrete-wrapped pipe having an inner water-impermeable resinous coating, the concrete wrapping is formed with a continuous inner portion covering the resinous coating and a helically slotted outer portion forming a helical wrap, the helical slot extending at least to the depth of a mesh reinforcement embedded in the concrete. The concrete wrapping serves as a water-permeable impact resistant barrier while permitting limited bending of the pipe.
447994
Ridout & Maybee Llp
Shaw Industries Ltd.
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