Screw coupling and tube junction manner null for tube junction

摘要

PROBLEM TO BE SOLVED: To provide a means for sealing and joining ends of metal tubes usable in particular in the petroleum industry. ;SOLUTION: This joint includes a sleeve 2 provided with two female housings 3, 4 with inner threads 5, 6. Two male elements 9, 10 of two metal tubes provided with mutually corresponding outer tapered screws 7, 8 having non-threaded extremity zones 11, 12 are screwed into the threads 5, 6. Front walls 13, 14 in the non-threaded extremity zones abut one against the other. A clearance exists between lateral walls 15, 16 of these zones and an annular axial direction passage 17 of the sleeve 2 opposite. Two pairs of male/female stop shoulders 18, 18-1, 19, 19-1 prevent over-screwing. The heights of teeth of the male and female threads are identical.;COPYRIGHT: (C)1996,JPO