Patent ID: 7213845
Filing Date: 2007-05-08
Classification: F16L

Abstract:
1. A tube joint comprising a socket and a plug which are detachably connectable by the aid of balls by operating a sleeve, said tube joint further comprising: a lock mechanism which prevents said socket and said plug from any disengagement by regulating displacement of said sleeve in an axial direction; and a retaining mechanism which retains a locked state by preventing said sleeve from any rotation in a circumferential direction which would be otherwise caused by any unexpected external force, wherein said retaining mechanism includes a ratchet which is provided to surround an outer circumferential surface of a socket body and which is rotatable synchronously with said sleeve, and a coil spring which is interposed between said sleeve and said ratchet for urging said sleeve in a direction away from said ratchet under action of a spring force.