Pipe joints or couplings – Packed – Supplemental packing socket
Patent
1996-12-13
1998-07-07
Arola, Dave W.
Pipe joints or couplings
Packed
Supplemental packing socket
28514813, 285354, 285379, 285388, F16L 1706
Patent
active
057757437
ABSTRACT:
An apparatus for fluidly coupling a flanged pipe (2) having an annular flange (4) to a threaded pipe (22) having an externally threaded end (20) with an annular lip is disclosed. An annular nut (8) has an internal thread (10) for engaging the threaded pipe. An internal diameter of the annular nut is larger than an external diameter of the flange of the flanged pipe. Thus, the annular nut can slide without deformation over the flange of the flanged pipe. The annular nut also acts as a retaining surface. An internal diameter of an annular insert (12) is smaller than the external diameter of the flange of the flanged pipe. Because of the difference in diameter, the annular insert cannot slide freely over the flange of the flange pipe. Additionally, the annular insert has a split (14) that allows the annular insert to reversibly expand to slip over the flange of the flanged pipe. The annular insert bears against the retaining surface of the annular nut and the flange of the flanged pipe when the annular nut and the annular insert have both been slid over the flange of the flanged pipe. When threaded onto the threaded pipe, the annular nut is retained on the flanged pipe by the annular insert that prevents the annular nut from sliding over the flange of the flanged pipe.
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