Pipe joints or couplings – Nonmetal to metal – Internal member
Patent
1998-09-21
2000-08-01
Arola, Dave W.
Pipe joints or couplings
Nonmetal to metal
Internal member
285347, 29516, 29890144, F16L 33207
Patent
active
060955716
ABSTRACT:
A tubing connector for sealingly engaging an end portion of a tubing to serve as a conduit for pressurized fluids is described. The tubing connector is particularly intended for use with a composite tubing having inner and outer plastic layers with an intermediate aluminium layer. An elastic seal ring is provided in each of two annular spaced apart grooves in an external periphery of a connector portion of the tubing connector. Each of the grooves has a depth that approximates a thickness of the seal ring and a width greater than a width of the seal ring. When the connector portion is inserted in the tubing and a radial pressure is exerted on the tubing by a crimp ring, the plastic inner periphery of the tubing intrudes into each annular groove and further compresses the seal ring inwardly in the groove. The remainder of the tubing overlapped by the crimp ring is compressed tightly around the external periphery of the connector portion. Therefore, a fluid tight seal is achieved. The advantage is a reliable connector for composite tubing that is quickly and easily installed and is adapted to provide a fluid-tight seal even when subjected to high temperature fluids under pressure.
REFERENCES:
patent: 398582 (1889-02-01), Cowen
patent: 724129 (1903-03-01), Schrader
patent: 3112939 (1963-12-01), Graham
patent: 4603890 (1986-08-01), Huppee
patent: 5364134 (1994-11-01), Anderson
patent: 5378023 (1995-01-01), Olbrich
patent: 5480196 (1996-01-01), Adams, Jr.
Arola Dave W.
Helget Gerald E.
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