Patent ID: 6338506
Filing Date: 2002-01-15
Classification: F16L

Abstract:
A pipe-fastening structure for an evaporation valve having a housing and a gas extraction path formed within the housing, said structure comprising:a cylindrical connecting member, fixed to the housing, with first engaging means formed at an outer wall and an inner space communicating with the gas extraction path; a stopper member having a cylindrical inner member and second engaging means engaging with the first engaging means in two stages, closely fitting with the inner and outer walls of the cylindrical connecting member; a variable member, formed at part of the inner member in a cylindrical shape with a diameter capable of enlargement; channels formed in the same circumferential direction at the inner wall of the variable member at a position midway in the axial direction; a pipe for connecting evaporation valves; and a large diameter bulge section formed in the vicinity of an end of the pipe, wherein locations of the inner member other than the variable member fit closely with the cylindrical inner wall of the connecting member and the first and second engaging means undergo first stage engagement, and then the pipe and the stopper member are moved with respect to the connecting member, the variable member fits closely with the inner wall of the connecting member, and the first and second engaging means undergo second stage engagement.