Patent ID: 7240925
Filing Date: 2007-07-10
Classification: F16L

Abstract:
1. A tube joint comprising: a joint body which has a through-hole as a fluid passage formed in an axial direction and which has a first screw section formed at least at one end; a nut member which connects a tube member to said joint body, said nut member being fitted to said one end of said joint body by a second screw section that is screwed with said first screw section; a fastening mechanism which is provided at said one end of said joint body and which is pressed radially inwardly by an inner wall surface of said nut member for engaging with a diametrally-expanded outer circumferential surface of said tube member; and a regulating element which is provided on an end surface of said nut member to be screwed on said joint body and which regulates a screwing amount of said nut member on said joint body, wherein said regulating element comprises an annular projection having a continuous annular shape that protrudes a predetermined length from said end surface of said nut member toward said joint body, and said screwing amount of said nut member is regulated by abutment of a continuous annular end surface of said annular projection against an annular step of said joint body, said annular projection being plastically deformable so that said nut member is capable of being further screwed after said continuous annular end surface of said annular projection abuts against said annular step of said joint body through compression and deformation of said annular projection.