Pipe joints or couplings – End to side or plate – Expansible packing on spigot
Patent
1981-04-28
1983-10-25
Arola, Dave W.
Pipe joints or couplings
End to side or plate
Expansible packing on spigot
285DIG18, 29512, 29523, F16L 502
Patent
active
044114583
ABSTRACT:
A stem securing assembly for conduits and a method for its use is provided herein. The conduit, e.g., of polyethylene tubing, is apertured through the wall thereof and a hollow stem to be secured thereto, e.g., for sprinkler heads and the like, is provided with a frusto-conical bulbous base. Preferably, it is provided with a double sloping shouldered base with the diameter of the frusto-conical bulbous base being slightly less than the diameter of the conduit aperture so that the lower end of the hollow stem is insertable through the aperture. A malleably deformable, e.g., resilient, sleeve is positioned to surround the stem and to rest on the frusto-conical bulbous base, or on the second shoulder if both are provided. The assembly so provided is inserted into the aperture. The sleeve has an outside diameter enabling snug insertion of the sleeve into the aperture. A clamping member, e.g., a screw-threaded nut or the like, engages the stem and is urged, e.g., screwed, downwardly just barely to engage the upper end of the sleeve. The upper end of the assembly is then held and the clamping member, e.g., the nut, is tightened downwardly. This expands the sleeve radially outwardly into sealing engagement with the walls of the aperture. In addition, this action draws the hollow stem upwardly so that it slides through the sleeve until the frusto-conical bulbous base is engaged by the sleeve. Further tightening expands the sleeve further radially outwardly by way of the frusto-conical bulbous base. When tightened fully, the hollow stem is held in firm sealing relationship with the aperture through the wall of the conduit, and the lower end of the sleeve, which is within the conduit, is expanded to a diameter greater than the diameter of the aperture.
REFERENCES:
patent: 980901 (1911-01-01), Ballantyne
patent: 2398041 (1946-04-01), Russell
patent: 2813568 (1957-11-01), Kilmarx
patent: 3841667 (1974-10-01), Sands
Pohoreski Anton P.
Strunk Norman E.
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