Pipe joints or couplings – With means blocking release of holding means
Patent
1989-01-25
1990-05-08
Callaghan, Thomas F.
Pipe joints or couplings
With means blocking release of holding means
285354, 285376, 285901, 285924, F16L 1702
Patent
active
049232215
ABSTRACT:
A safety connection for connecting a plug into a tubular member, the tubular member having an internal sealing surface, an internal recess positioned outward from said internal sealing surface, said recess ending in inwardly extending lip with a plurality of slots therethrough and external threads; a plug having a body with a plurality of radially extending pins positioned to pass through said slots in said lip, a radially extending flange and a pin extending radially outward from the plug at a position immediately axially inward of said flange and being out of axial alignment with said pins and sized to fit within one of said slots to position said plurality of pins out of alignments with said slots; and a securing ring having an inwardly extend flange for surrounding the exterior of said plug on the exterior side of said plug flange and internal threads for engaging the external threads on said tubular member to secure said plug in said tubular.
REFERENCES:
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patent: 3574359 (1971-04-01), Klein
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patent: 4133560 (1979-01-01), Ishikawa et al.
patent: 4249670 (1981-02-01), Hug
patent: 4316316 (1982-02-01), Kappenhagen
patent: 4750765 (1988-06-01), Cassidy et al.
patent: 4801160 (1989-01-01), Barrington
Callaghan Thomas F.
Cameron Iron Works U.S.A., Inc.
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