Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1981-04-22
1983-08-23
Scanlan, Jr., Richard J.
Pipe joints or couplings
With casing, lining or protector
Lined
285331, 285286, 285369, 285383, 264 35, F16L 5916, F16L 2500, F16L 4702, F16L 2102
Patent
active
044000197
ABSTRACT:
The invention is directed to a multilayer pipe joint and, more particularly, to a pipe joint for effectively joining sections of pipe having an outer metal casing, an inner plastic pipe, and an annular cement grout sleeve. The joint comprises a dual material ring which is at least partially fitted within a recessed annular space at the end of each multilayer pipe section. The metal casing may be welded to the outer steel component of the ring, and the inner plastic pipe is sealed against the plastic component of the pipe.
REFERENCES:
patent: 3189371 (1965-06-01), Gwan
patent: 3266821 (1966-08-01), Safford
patent: 3662045 (1972-05-01), Tierling
patent: 3686747 (1972-08-01), Bagnulo
Scanlan, Jr. Richard J.
Unisert Systems, Inc.
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