Double-walled corrugated synthetic resin pipe

Details Double-walled corrugated synthetic resin pipe Double-walled corrugated synthetic resin pipe

F - Mech Eng,Light,Heat,Weapons

16

L

189/41

F16L 11/11 (2006.01)

Patent

CA 1192503

ABSTRACT OF THE DISCLOSURE A double-walled corrugated synthetic resin pipe com- prises a straight inner pipe, and a corrugated outer pipe surrounding the inner pipe, and joined integrally thereto. The inner pipe is formed by a spirally wound flat strip of a synthetic resin having adjoining turns joined to each other along their adjoining edges, and has a generally even outer surface. The outer pipe is formed by a spirally wound corrugated synthetic resin strip also having adjoining turns thereof joined to each other along their adjoining edges. The outer pipe has a corrug- ation defined by a ridge portion, a groove portion, and a inter- mediate portion, and the groove portion has an inner surface joined to the outer surface of the inner pipe.

414180

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