Pipe joints or couplings – Frangible element – Score line or groove
Patent
1981-02-24
1982-12-07
Arola, Dave W.
Pipe joints or couplings
Frangible element
Score line or groove
285 23, 285 94, 285110, 285111, 285231, 285345, 285379, 285423, F16L 5500
Patent
active
043623239
ABSTRACT:
Pipe with socket end provided with an annular groove chamber containing a sealing ring supported by a support ring, which support ring compresses the sealing ring less than the final inserted spigot end. The support ring closes the groove and the sealing ring or the closed space is provided with lubricant.
REFERENCES:
patent: 2226067 (1940-12-01), Morgan
patent: 3462175 (1969-08-01), Johnson
patent: 3947944 (1976-04-01), Washington
patent: 4022205 (1977-05-01), Tenczar
Blok Gerard A. E.
Lodder Bernhard
van Dongeren Jan P.
Arola Dave W.
Wabin B.V.
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