Patent ID: 7815226
Filing Date: 2010-10-19
Classification: F16L

Abstract:
1. A tube fitting for metal tubing connections, comprising: a first fitting component and only a single ferrule, said fitting component having an interior bore that is adapted to receive a metal tube end along a longitudinal axis of the fitting; said bore having a camming surface at a first end of said bore; said single ferrule having a front end that engages said camming surface to form a seal when the fitting is pulled-up by tightening a second fitting component with said first fitting component and a central bore formed by a cylindrical interior wall sized to be closely received over the metal tube end during assembly; said single ferrule front end having a front edge that will bite into the metal tube end when the tube fitting is assembled with and pulled up on the metal tube end; said ferrule cylindrical interior wall deforms to form a convex portion in a longitudinal section upon pull-up; wherein said camming surface forms an included angle of at least thirty-five degrees to about sixty degrees with respect to said longitudinal axis.