Patent ID: 6543815
Filing Date: 2003-04-08
Classification: F16L

Abstract:
A tube joint comprising:a cap nut having a threaded portion with an internal thread, and a through-hole provided in a direction of an axis of said threaded portion, said through-hole having a hole edge portion; a tubing having an end passing through said through-hole of said cap nut; a drop-off prevention ring having first and second ends, a bore surface, and at least one anchoring portion projecting from said bore surface and biting into said end of said tubing so that said drop-off prevention ring is attached to said end of said tubing; and a joint main body having an annular groove into which said end of said tubing and said drop-off preventive ring are fitted, and an external thread which is engaged with said internal thread of said cap nut so that said hole edge portion of said through-hole is pressed against said first end of said drop-off prevention ring in order to prevent drop-off of said tubing.