Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means
Patent
1978-04-25
1980-10-21
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
With separate, encased pipe-gripping means
285242, 285286, 285323, 285423, F16L 4700
Patent
active
042290252
ABSTRACT:
A stab-type coupling and method for connecting an end portion of a smooth wall non-metallic pipe to fittings or other pipes. The coupling is defined by a non-metallic coupling body, a generally elongated hollow insert, annular spacer rings, seal rings, a collet ring, and a retaining collet all disposed within the recess of the coupling body. The retaining collet is provided with a tapered external surface which is complementary to an internal frusto-conical surface defined by a back-up ring molded within the coupling body. The coupling is made up as by inserting the end of a smooth wall non-metallic pipe into the coupling body such that the pipe is received about the generally elongated hollow insert and within the retaining collet. The toothed internal surface of the retaining collet is adapted to engage the non-metallic pipe. Attempted withdrawal of the pipe from the coupling body is resisted by the collet toothed surface as well as the bearing engagement of the collet with the back-up ring molded into the coupling body.
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Passerell David P.
Volgstadt Frank R.
Callaghan Thomas F.
Perfection Corporation
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