Method of making a pipe coupling

Details Method of making a pipe coupling Method of making a pipe coupling

1978-12-07

1980-11-18

Goolkasian, John T.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

291574, 138109, 138155, 156 49, 156158, 156189, 156191, 156192, 156289, 174 73R, 174 75R, 174 84R, 174 85, 174 97, 174110FC, 1563042, B32B 708, F16L 2100, H01R 4300

Patent

active

042343682

ABSTRACT:
Two coaxial metal pipes, whose confronting extremities are each provided with a plurality of peripheral ribs of staggered height separated by two or more peripheral grooves, are interconnected by a coupling sleeve of fiber-reinforced thermosetting resin subdivided into several coaxially interleaved and independently deformable cylindrical shells each terminating in a pair of internal beads engaged in a respective peripheral pipe groove. The shells, increasing in axial tensile strength from the innermost to the outermost one, are preferably separated from one another by interposed antibonding layers of thermoplastic resin. A resinous filler can be inserted between the pipe extremities for electrically insulating them from each other. The shells of the coupling sleeve can be formed by coiling resin-coated filaments around the pipe axis, advantageously with application of an antifriction layer on each inner shell before the thermosetting material thereof has been fully hardened.

REFERENCES:
patent: 3993331 (1976-11-01), Schwarz

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