Pipe joint

Pipe joints or couplings – Particular interface – Tapered

Patent

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Details

285355, 285383, F16L 2500

Patent

active

044589255

ABSTRACT:
A pipe joint with premium threads having both metal-to-metal and polymeric seals to block fluid leakage through the joint. A polymeric seal ring is preferably carried within an annular groove in the box end. Metal sealing surfaces, each having a different inside diameter, are provided on opposite sides of the annular groove to form metal-to-metal seals with two compatible metal sealing surfaces on the exterior of the pin member. The joint is thus characterized by two metal-to-metal seals formed on opposite sides of the annular groove to trap the seal ring therebetween. The metal-to-metal seals cooperate to prevent undesired extrusion of the seal ring.

REFERENCES:
patent: 2907589 (1959-10-01), Knox
patent: 2980451 (1961-04-01), Taylor et al.
patent: 3100656 (1963-08-01), MacArthur
patent: 3467413 (1969-09-01), Madrelle
patent: 3489437 (1970-01-01), Duret
patent: 3489438 (1970-01-01), McClure
patent: 3497246 (1970-02-01), Weiner
patent: 3508771 (1970-04-01), Duret
patent: 3658368 (1972-04-01), Hokanson
patent: 4004832 (1977-01-01), Connelly

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