A collet for a swivel pipe coupling

摘要

An annular collet (12a) or gripping member radially located within a coupling assembly (10) of the type having a hollow body (18), nut (14) and an O-ring or seal (16) for connection of a pipe (34) thereto. The collet (12a) is axially split, the split (26) defined by first (28) and second (30) generally parallel ends that are of an engageable configuration, typically by one end having a projection and the other end a correspondingly shaped cavity enabling the ends to interlock. In normal operation of the coupling the collet (12a) exerts a longitudinal force on the O-ring (16) causing a seal. When it experiences an axial force that would normally relatively displace the two ends causing a leak, being engaged to each other this movement is resisted ensuring that the seal is maintained. The present invention also relates to a coupling having such a collet.