Pipe joints or couplings – With fluid pressure seal – With external pressure supply
Patent
1977-02-23
1979-05-08
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
With external pressure supply
285 18, 285 93, 285104, 285365, F16L 2108
Patent
active
041532805
ABSTRACT:
A pipe coupling comprising a sleeve which is fitted over the adjacent ends of the pipe sections. The sleeve has sealing means for sealing the sleeve against the pipe and gripping means for gripping the pipe. The sealing means comprises an annular groove which accommodates an annular tire the interior of which communicates with the exterior of the sleeve through a bore in the wall of the sleeve. The gripping means comprises arcuate groove sections on the inside of the sleeve which accommodates a tubular member or members which communicate with the exterior through bores in the wall of the sleeve, and jaw sectors with teeth which bite into the outside of the pipe. The tubular member or members and the annular tire are filled with a hardenable composition and maintained under pressure until set to force the sealing member into sealing contact against the outer surface of the pipe and cause the gripping teeth to bite into the outer surface of the pipe.
REFERENCES:
patent: 2306160 (1942-12-01), Freyssinet
patent: 2389977 (1945-11-01), Hollerith
patent: 3023995 (1962-03-01), Hopkins
patent: 3337222 (1967-08-01), Smith et al.
patent: 3420554 (1969-01-01), Straub
patent: 3473640 (1969-10-01), Schutz
patent: 3480043 (1969-11-01), Proudfoot et al.
patent: 3737179 (1973-06-01), White, Jr.
patent: 3843167 (1974-10-01), Gronstedt
patent: 3860270 (1975-01-01), Arnold
Callaghan Thomas F.
Pilgrim Engineering Developments Limited
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