COUPLING Russian patent published in 2008 - IPC F16L37/14 

FIELD: mechanics.

SUBSTANCE: coupling has casing receiving insert provided with thrust collar and locking part furnished with two tabs and locking section, the locking part being fitted into the coupling casing to translate between an in- and out-positions. The locking part is furnished with a push-out chamfer interacting with the insert thrust collar to allow it moving from the in- and out-positions. The coupling incorporates also a device intended for preliminary locking and a retractor interacting there between so as to allow the insert thrust collar to come behind the said push-out chamfer, the insert being driven inside the coupling casing. Now the preliminary locking device gets behind the said thrust collar to engage it, while the retractor moves the locking part into intermediate position of preliminary locking.

EFFECT: reliable coupling assembly.

4 cl, 5 dwg