Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means
Patent
1976-03-25
1978-01-17
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
With separate, encased pipe-gripping means
285323, 285375, F16L 1700
Patent
active
040688666
ABSTRACT:
A joint for connecting a smooth wall pipe to fittings or other pipes, the joint including a hollow body member having a passageway therethrough, a split gripper ring positioned and movable axially within the passageway, an elastomeric sealing ring also positioned and movable axially within the passageway and means for axially urging the gripper ring and the sealing ring apart whereby the gripper ring has improved initial grip on the pipe upon insertion of the same and the sealing ring has improved sealing characteristics over a range of positive and negative pressures and over a hot and cold temperature range. The external configuration of the split gripper ring cooperates with the internal configuration of the passageway so that the pipe can be installed axially into the body member but when pulled outwardly of the body member the gripper ring is further actuated from its initial gripping action to prevent removal of the pipe. The sealing ring is provided with a load on the same at all times whereby it has an initial sealing function upon insertion of the pipe and also maintains this sealing function despite subsequent disturbances of the sealing ring by movement of the pipe. The means urging the sealing ring and the gripper ring axially apart also functions to make out of round pipe more round upon insertion so that the position of the sealing ring is not unduly disturbed from its seat.
REFERENCES:
patent: 1434631 (1922-11-01), Reynolds
patent: 2017994 (1935-10-01), Spang
patent: 2533059 (1950-12-01), Shaffer
patent: 2848256 (1958-08-01), Tyler
patent: 3150886 (1964-09-01), Briegel et al.
patent: 3195931 (1965-07-01), Braunagel
patent: 3724880 (1973-04-01), Seiler
patent: 3815940 (1974-06-01), Luckenbill
Callaghan Thomas F.
Mueller Co.
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