Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means
Patent
1982-04-16
1983-11-29
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
With separate, encased pipe-gripping means
285321, 285337, 285374, 285404, F16L 2102
Patent
active
044177542
ABSTRACT:
A pipe joint for preventing separation comprising a holding member connectable to an annular outer flange formed at the end of a socket and surrounding the outer periphery of a spigot outside the socket, the holding member being annular or being adapted to form an annular shape, the holding member being provided on its inner periphery with a tapered surface increasing in diameter toward the socket; a stopper in the form of a ring divided at one portion and provided with an outer peripheral tapered surface increasing in diameter toward the socket and with engaging edges in circumferential rows on its inner periphery, the stopper being interposed between the tapered surface of the holding member and the spigot outer periphery; and tap bolts extending through the holding member at suitable portions along its circumference for pressing the stopper from outside against the spigot outer periphery. Because the stopper is thus shaped, the joint is easy to assemble and manufacture. When the spigot acts to slip off with the tap bolts tightened up, a diametrically constricting force acts on the spigot uniformly circumferentially thereof without any unevenness to reliably prevent separation of the spigot from the socket.
REFERENCES:
patent: 1898623 (1933-02-01), Gammeter
patent: 3726549 (1973-04-01), Bradley, Jr.
patent: 3920270 (1975-11-01), Babb, Jr.
patent: 4092036 (1978-05-01), Sato et al.
patent: 4127290 (1978-11-01), Mutschlechner
patent: 4194769 (1980-03-01), Bram
Kashi Takeshi
Nakajima Toshi
Yamaji Tadao
Callaghan Thomas F.
Farley Joseph W.
Kubota Ltd.
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