Fluid connector

A plug for use in combination with a socket, connected to a first fluid conduit, including a plug receiving chamber and valve mechanism which is opened when said plug is received in said plug receiving chamber and is closed when said plug is removed from said plug receiving chamber, said plug comprising:

• a plug main body integrally formed as one body and having a first end portion connected to a second conduit, a second end portion for insertion into said plug receiving chamber and a cylindrical axial passage in communication with the second conduit;
• a valve mechanism, provided in said plug main body, for opening and closing said axial passage;
• and
• said valve mechanism having a cylindrical valve member slidably provided in said plug main body and urged toward said second end portion, and a packing provided on said second end portion of said plug main body, for retaining said valve member against an urging force applied thereto and closing said axial passage in cooperation with said valve member, one of said valve member and a cylindrical axial passage of the plug main body being smoothly formed in an axial direction and one end of said valve member toward said first end portion being slidably guided along and in engagement with a circumferential surface of said cylindrical axial passage, another end of said valve member toward said second end portion having a reduced diameter defining an annular passage with said packing and said axial passage, said valve member having at least one radial opening therethrough in communication with said annular passage both when said valve member closes said axial passage and opens said axial passage.

A fluid connector for communicating a first conduit with a second conduit, including a socket connected to said first conduit, a plug connected to said second conduit and detachably connected to said socket and a locking mechanism provided at said socket, for locking said plug fitted in said socket, the fluid connector comprising:

• said socket having a rear body connected to said first conduit, and a tubular main body connected to said rear body and receiving said plug, said rear body and said tubular main body being formed with an axial passage;
• a first valve mechanism for opening and closing said axial passage in said socket;
• said first valve mechanism including a valve stem with one end fixed so as not to move axially relative to said socket and the other end provided with a valve seat, a sleeve-like slide member movable in said axial passage with respect to said socket in a sealing state, a first packing provided in said slide member and cooperating with said valve seat for opening and closing said passage, and urging means for urging said slide member toward a position at which said first packing and said valve seat close said passage;
• said plug having a plug main body which is integrally formed as one body, said plug main body having a first end portion connected to said second conduit, a second end portion capable of being inserted in said socket and a cylindrical axial bore fluid-communicating with said second conduit;
• a second valve mechanism for opening and closing said axial bore being provided in said plug main body;
• and
• said second valve mechanism having a cylindrical valve member slidably provided in said axial bore of said plug main body and urged toward said second end portion, and a second packing provided on said second end portion of said plug main body, for retaining said valve member against an urging force applied thereto and closing said axial bore in cooperation with said valve member, said valve member being slidable with respect to said plug main body and having a large-diameter portion guided in said axial bore, a small-diameter portion cooperating with said second packing, an end wall arranged at a side of said small-diameter portion, and an inner hole closed at a side of said small-diameter portion by said end wall, said large-diameter portion, said small-diameter portion, said end wall and said inner hole defining a stepped shape, said small-diameter portion and said plug main body defining an annular space therebetween, said small-diameter portion having at least one radial hole for causing said annular spacer to communicate with said inner hole.