Pipe joints or couplings – With casing – lining or protector
Patent
1989-08-21
1991-06-11
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
285 15, 285156, 285284, 285330, 285419, 285914, 285919, 138166, F16L 5500
Patent
active
050226851
ABSTRACT:
A secondary containment pipe system disposed around a primary pipe system and comprising a joint that is divided along a central parting plane and has laterally projecting flanges that form internal passages for adhesive sealing cement, that is injected through ports while the joint is clamped together around secondary containment pipes. The joint has pipe sockets that have internal grooves that also are filled with injected cement, thus forming a continuous, uninterrupted seal around the interior of the joint, and also has spillover grooves and wells for minimizing leakage, and lateral aligning surfaces. The clamping means are C-shaped clips that can be left in place indefinitely. The secondary containment pipes also are divided, being formed by elongated pipe elements fitted together around the primary pipes and having snap-latching coupling means along their abutting edges. One embodiment has internal reinforcing flaps that extend across the abutting edges and define internal sealing passages along the coupling means to be filled with injected adhesive cement through external ports, and also has means along the free edges for holding the flaps in place. A second pipe embodiment has tongue-and-groove couplings along thickened edges, and internal passages along the couplings in the form of enlarged coupling grooves, and an external reinforcing strip is provided for optional use in pressurized systems.
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PVC and ABS Injected Solvent Cemented Plastic Pipe Joints, ASTM Designation F 545 (1985).
Hogan Joseph M.
Jones Thomas A.
Stiskin Hal
Arola Dave W.
Thompson Jeffrey L.
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