Patent ID: 9541229
Date: 2017-01-10
CPC Classifications: B21D,F16L

Claim:
1. A copper T-fitting comprising: a first leg and a second leg extending orthogonally from said first leg and wherein said fitting is made using hydro-forming with a shovel-nose punch shaped to reduce the amount of copper in the area of said first leg adjacent to and on opposite sides of the axis of intersection of said second leg with said first leg, wherein said punch has a generally cylindrical body having a central aperture for supplying high pressure fluid to a copper pipe, wherein said tapered punch has a cylindrical passageway terminating in an end having a tapered and concavely curved lip extending outwardly from said body, said punch including a tapered top on a side of said cylindrical passageway opposite said concavely curved lip; and a conical transition zone extending between said concavely curved lip and said tapered top.