Patent ID: 6681803
Filing Date: 2004-01-27
Classification: F16L,Y10T

Abstract:
A tube joint for a fluid, comprising a socket and a plug which is connected to and disengaged from said socket, wherein said socket comprises:an outflow-preventive valve for closing a passage for said fluid with a cylindrical valve body which is coaxial with said socket and a valve element which is disposed in said valve body when said socket and said plug are disengaged from each other, said valve body being displaceable with respect to said socket, wherein a first seal is provided for sealing said socket and said plug before said valve body and said valve element are relatively moved when said socket and said plug are connected with each other, and wherein said valve body of said socket comprises an inner circumferential surface and a tapered surface having a gradually increasing diameter in a direction away from said inner circumferential surface, and wherein said first seal is disposed on one of an inner circumferential annular groove formed in said inner circumferential surface and an outer circumferential annular groove formed on a valve body of said plug.