Patent ID: 7922217
Filing Date: 2011-04-12
Classification: F16L

Abstract:
1. A tube gripping ferrule for a metal tube fitting, the ferrule having a central longitudinal axis and comprising: an annular metal body having a generally cylindrical radially interior wall extending through the center of the ferrule from a front end of the ferrule to a back end of the ferrule so that the ferrule can be installed over a metal tube end; an outer radial wall that extends from the ferrule front end to a rearward flange portion at the back end of the annular metal body, the outer radial wall comprising: a first tapered portion extending from the ferrule front end and having an increasing radial dimension towards the rearward flange portion, the first tapered portion extending to a crown portion, the crown portion comprising a convex surface that tapers radially inwardly towards the rearward flange portion, the crown portion being joined to a second tapered portion that extends to the rearward flange portion with an increasing radial dimension.