Patent ID: 6279242
Filing Date: 2001-08-28
Classification: F16L

Abstract:
Intrinsic gauging assembly for a ferrule type tube fitting, comprising:a coupling body having a threaded end that is capable of receiving a tube end;a threaded coupling nut that mates with said threaded end of the coupling body;at least one ferrule retained in the nut interior; anda visually perceptible marking on the coupling body that is visible when the fitting is in a finger tight condition, and that is substantially imperceptible after the fitting has been assembled on a tube end to an initial pull-up position, wherein said marking comprises at least two demarcations on said coupling body to form a leading and trailing marking edge; said leading edge corresponding to a predetermined initial pull-up of the assembly and said trailing edge corresponding to an additional predetermined axial displacement of said nut relative to said body beyond said initial pull-up.