Pullout resistant pipe coupling

Details Pullout resistant pipe coupling Pullout resistant pipe coupling

1981-08-05

1984-08-21

Arola, Dave W.

Pipe joints or couplings

With fluid pressure seal

With separate, encased pipe-gripping means

285174, 285256, 285322, 285382, 285369, F16L 1702

Patent

active

044666403

ABSTRACT:
An improved construction for resisting pipe pullout in a pipe coupling of a type subject to being inwardly swaged in the course of forming a coupled joint. A circumferentially extending lock ring having a plurality of axially spaced chisel shaped teeth on its inward face is inwardly dished about its periphery. The ring is axially located within the coupling shell by an annular inwardly extending protuberance on the inner face of shell interfitting within the dished section of the ring periphery. In response to an imposed swaging force, the coupling shell is constricted inwardly to compress a gasket into sealing engagement with a contained pipe section, while the lock ring is concomitantly constricted inwardly into a gripping interlock therewith.

REFERENCES:
patent: 3429587 (1969-02-01), Kish
patent: 3675949 (1972-07-01), Dawson
patent: 3790194 (1974-02-01), Kimberley
patent: 3843167 (1974-10-01), Gronstedt
patent: 3899183 (1975-08-01), Wild et al.
patent: 3915480 (1975-10-01), Kish et al.
patent: 4018462 (1977-04-01), Saka
patent: 4229026 (1980-10-01), Seiler

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