Patent ID: 7963571

Claim:
A high pressure tubing joint comprising: a first part of said joint forming an enlarged female end having a high-pressure tube and a female nut positioned over said female end; a second part of said joint forming a male end and including a male fitting; a replaceable insert piece sealingly engageable being deformed between facing surfaces of said female and male ends when said first and second parts are threadably tightened together; said facing surfaces being conically shaped, each surface of said insert which sealingly engages against a corresponding said facing surface having a convex shape; said first and second parts and said insert piece being coaxially aligned one to another; said insert piece having a cylindrical projection at one end thereof which matingly engages into a cylindrical cavity formed into a proximal end of said female fitting; said insert piece being freely removable and replaceable each time said tubing joint is disassembled.