Patent ID: 6869108

Claim:
A tube coupler comprising: a socket body 50 having a jaw 52 at its inner circumference to contact a seal ring 40 ; a cocking ring 60 being incorporated with the socket body 50 by a coupling means, and having grooves 62 and 64 where a safety ring 42 for preventing separation and a locking ring 44 are hooked at its inner circumference in an axial direction; a nipple 70 having grooves 72 and 74 where the safety ring 42 for preventing separation and the locking ring 44 are positioned at its outer circumference in the axial direction; a seal ring 40 inserted into the groove 54 formed by the jaw 52 of the socket body 50 and the inside end of the cocking ring 60 , and pressure-adhered between the outer circumference of the nipple 70 and the inner circumference of the socket body 50 ; the locking ring 44 hooked by the edge of a rib 76 formed at the outer circumference of the nipple 70 and the edge of the groove 64 formed at the inner circumference of the cocking ring 60 , for maintaining a hooking state of the nipple 70 ; and the safety ring 42 for preventing separation hooked by the edge of another rib 78 formed at the outer circumference of the nipple 70 and the edge of another groove 62 formed at the inner circumference of the cocking ring 60 , for maintaining an interim connection state of the nipple 70 .