Pipe joints or couplings – Elbow
Patent
1988-12-08
1991-03-05
Arola, Dave W.
Pipe joints or couplings
Elbow
285286, 285382, 285369, 285 21, 285906, 2281734, F16L 5500
Patent
active
049972146
ABSTRACT:
A preformed coupler for connecting plastic pipe to metal pipe comprises a convoluted tubular metal sleeve, a plastic tube extending part way into the metal sleeve, an annular gasket, and a retention means. The annular gasket, which encircles a portion of the plastic pipe, is compressed against the plastic pipe by the metal sleeve to form a fluid-tight seal. The retention means resists any effort to withdraw the tube from the sleeve. The free end of the metal sleeve can be telescoped over the end of the steel pipe to be joined, then the outer end of the plastic tube can be butt welded to the plastic pipe to be connected, and then the telescoped end of the sleeve can be welded to the metal pipe.
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Dresser "700" Universal Posi-Hold Couplings color brochure, Form 782-700, Dresser Manufacturing Division, Dresser Industries, Inc.
Dresser "700" Posi-Hold Couplings and Fittings, black and white brochure, Form 700-185, REV. 386, Dresser Manufacturing Division, Dresser Industries, Inc.
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Arola Dave W.
Dresser Industries Inc.
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