Patent ID: 6502323
Filing Date: 2003-01-07
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; and a 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 a recess formed in said coupling body; said recess having a leading edge and a trailing edge wherein said trailing edge corresponds to a predetermined axial displacement of said nut relative to said body during an initial pull-up of the assembly; said trailing edge further corresponding to a predetermined initial pull-up position beyond which said nut can be further advanced during subsequent remakes of the assembly.