Pipe joints or couplings – With assembly means or feature
Patent
1977-05-04
1978-11-07
Schroeder, Werner H.
Pipe joints or couplings
With assembly means or feature
285381, 285354, 285356, 285363, 29446, 29525, F16L 3500
Patent
active
041242300
ABSTRACT:
A pipe connector has a pin initially stabbed into a box, the pin and box then being axially loaded together at confronting transverse surfaces while the pin and box are pressurized to expand the box and compress the pin, so that when the pressure is relieved a pressure energized shrink fit is provided and the connector is rendered rigid to enhance tensile, compressive and bending strength and provide a fluid tight joint useful in making up lengths of pipe such as piles and pipelines. Locking screws hold the connector against axial separation to maintain the pin under axial compression and maintain the box under axial tension. The lock screws are threaded into the upper end of the box to fasten the pin to the box or a sleeve or gland nut can be threaded on one of the pins and the box and engage a locking shoulder on the other of the pin and the box.
REFERENCES:
patent: 1307540 (1919-06-01), Dohner
patent: 2457648 (1948-12-01), Donner
patent: 2671949 (1954-03-01), Welton
patent: 3114566 (1963-12-01), Coberly et al.
patent: 3240513 (1966-03-01), Turzillo
Arbes C. J.
Kriegel Bernard
Schroeder Werner H.
Vetco Inc.
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