High pressure coupling with provision for preventing separation of parts and with anti-galling provision

A fitting comprising first and second members including interengaged first and second threads, said first member including a ramp, said second member including an arrangement adapted by adjustment of the interengaged threads for being brought to bear against said ramp to generate a force to maintain the threads in tightly engaged relationship thereby to avoid play between the threads, said members including generally tubular members having a common axis of symmetry, said ramp having a surface of generally truncated conical shape, and including a base, said first member being provided with a recess adjacent said base;

• said second member including a circular arrangement of flags adapted to extend into said recess, said flags sloping in the same circumferential direction to engage in said recess.

A nut adapted for engaging a fitting part, said nut comprising a tubular section including opposite end portions, fingers on and in extension of one of said end portions and separated by slots, and extensions on said fingers extending radially inwards therefrom, said tubular section including an interior thread, said tubular section including a main tubular section and a separable auxiliary section interengaged with said main tubular section and supporting said fingers and extensions, said tubular section being provided with an annular groove and said auxiliary section including a radial projection engaging in said groove.

A nut adapted for engaging a fitting part, said nut comprising a tubular section including opposite end portions, fingers on and in extension of one of said end portions and separated by slots, and extensions on said fingers extending radially inwards therefrom, said tubular section including an interior thread, said tubular section including a main tubular section and a separable auxiliary section interengaged with said main tubular section and supporting said fingers and extensions, said extensions and fingers being respectively in the form of flags and staffs therefor.

A structure for providing a coupling for a tube-like member, said structure comprising first and second means for providing said coupling with the tube-like member, said first and second means including interengaged threads, one of said means including a ramp, said ramp being fixed relative to the thread on the means including the ramp, the other of said means including a resilient member coupled to the thread on the means including said resilient member, said resilient member engaging said ramp to generate a friction torque to resist detaching movement between the threads and to generate a force to minimize play between the threads, said first means being effective to lock said tube-like member to said second means to create a pressure seal therewith, and a ferrule-like member operatively interposed between the first and second means and being displaceable by said first means to force said tube-like member against said second means.