Patent ID: 6371531
Filing Date: 2002-04-16
Classification: F16L

Abstract:
A coupling for receiving an end of an associated non-metallic tube, the coupling comprising:a coupling body having an opening dimensioned to receive an associated non-metallic tube end and at one end communicating with an internal cavity, the cavity including a tapered wall that converges toward the opening; a seal assembly received in the coupling body cavity for sealing between the coupling body and an associated non-metallic tube end; a collet received in the coupling body cavity and having a tapered external surface that engages the tapered wall of the cavity to resist pull-out of an associated non-metallic tube end, the collet further including an inner toothed surface for gripping an external surface of an associated non-metallic tube end and a split that allows the collet to radially expand and contract; and a circumferentially discontinuous rotation prevention member extending from the collet along a substantial portion of an axial length thereof to limit relative rotation between the collet and an associated non-metallic tube end.