F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/59
F16L 47/00 (2006.01)
Patent
CA 1269625
PLASTIC PIPE WITH INTEGRAL END CONNECTION AND METHOD FOR JOINING ABSTRACT OF THE INVENTION Polyolefin pipe having an integral end connection. The pipe is fabricated with male and female end connections in order that the pipe may be press-fitted together with the interior and exterior forming a flush uninterrupted surface. One or more radial ribs and grooves are formed on the inter- ior of the female connection while a registering series of ribs and grooves are formed on the exterior of the male connection. The ends of the pipe are bevelled in order that the ends pressed together engage and by the slight resiliency of the polyolefin pipe construction permit the slight expan- sion and contraction of the ends to provide a locking interfit of the respective ribs and grooves in the two ends. The wall thicknesses of the end connection and width of the ribs and grooves are particularly dimensioned in order that the male end may be inserted to a complete lock position without premature engagement and that should failure occur, it be at the readily observable pipe wall rather than in internal rib. Sides of the ribs may also be bevelled to provide for dis- engagement of the pipe ends when pulled apart.
546406
Isco Industries Inc.
Osler Hoskin & Harcourt Llp
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