Fitting for tube and pipe with tapered ferrule
AssigneeSwagelok Company
InventorsPeter C. Williams, Mark Clason, Andrew Marshall, Jason Fruh, Eric M. Kvarda
Life of this patent
Estimating the term…
Abstract
A ferrule for a conduit fitting includes in one embodiment a generally annular body comprising a cylindrical interior wall, a rearward portion with a frusto-conical recess that presents a camming surface, and a tapered outer surface. The tapered outer surface extends radially outwardly from a forward portion of the generally annular body towards the rearward portion, with the rearward portion further comprising an outer wall portion that tapers radially inwardly at an angle μ towards a back end of the annular body.
Claims17
A tube fitting, having a longitudinal axis, comprising:
- a first fitting component comprising a ferrule camming surface,
- a second fitting component comprising a socket with a ferrule drive surface and a tapered wall that tapers at an angle ε relative to the longitudinal axis,
- a front ferrule and a back ferrule, said back ferrule engaging said ferrule drive surface and a rearward portion of said front ferrule when the fitting is in a finger tight position,
- said front ferrule comprising a tapered outer surface that engages said ferrule camming surface when the fitting is in a finger tight position,
- said tapered outer surface of said front ferrule extending radially outwardly from a forward portion of said front ferrule towards said rearward portion of said front ferrule,
- said rearward portion of said front ferrule comprising a radially extending flange portion and an outer wall portion that tapers radially inwardly at an angle μ relative to the longitudinal axis from a forward end of said radially extending flange poration towards a back end of said front ferrule, said angles ε and μ have the relationship ε≠μ when the fitting is in a finger tight position.
A tube fitting, comprising:
- a threaded nut and a threaded body that mates with said threaded nut,
- a front ferrule and a back ferrule,
- said threaded nut comprising a socket that at least partially receives said front ferrule and said back ferrule, said socket comprising a ferrule drive surface and a tapered surface, said tapered surface tapers at an angle ε relative to a longitudinal axis of the tube fitting, said front ferrule comprising a rearward portion that engages said tapered surface when the fitting is pulled-up onto a tube end, wherein said front ferrule rearward portion comprises a radially extending flange and an outer wall that tapers radially inwardly at an angle μ from a forward end of said radially extending flange towards a back end of said front ferrule, said outer wall presenting a difference angle with said tapered surface when the fitting is in a finger tight position prior to pull-up of the fitting.
Dependencies are inferred from the claim text.