Ferrule with radial crown
AssigneeSwagelok Company
InventorsPeter C. Williams, Howard C. B. Kuhns
Life of this patent
Estimating the term…
Abstract
A ferrule for a metal tube fitting includes an annular body having a generally cylindrical radially interior wall extending through the center of the ferrule. An outer radial wall extends from the ferrule front end to a rearward flange portion of the annular body. The outer radial wall has: a first tapered portion extending from the ferrule front end with an increasing radial dimension towards the rearward flange portion, the first tapered portion extending to a crown portion, the crown portion including a convex surface that tapers radially inwardly towards the rearward flange portion.
Claims22
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.
A tube fitting, comprising:
- a first fitting component, a second fitting component, a front ferrule and a back ferrule, said back ferrule 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.
Dependencies are inferred from the claim text.