F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
285/63
F16L 15/00 (2006.01)
Patent
CA 1078428
Abstract of the Disclosure A pipe joint including pin and box members defining an axis. First and second pairs of interengaged threads are provided on the respective mem- bers. The first pair of threads are axially spaced from the second pair of threads, and a first pair of generally frusto-conical shoulders are provided on the members located axially between the first and second pairs of threads. The shoulders have semi-dovetail interfit on make-up of the joint. The threads or the first and second pairs have semi-dovetail interengaged flanks which are negatively angled in axial radial planes, and relative to planes normal to said axis, the flanks on the pin member facing away from the end of the pin member. The frusto-conical shoulders are positively angled in axial radial planes, and relative to planes normal to the axis. The joint includes a second pair of annular shoulders on the respective members which extend in substantially parallel, face-to-face, proximate but spaced relation on normal make-up of the joint. The second pair of shoulders have semi-dovetail interfit in the event of sufficient coining of the shoulders of the first pair of joint make-up, the interfit being positively angled in axial radial planes and relative to planes normal to the axis.
322101
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