Abstract: A fluid coupling includes a socket with a socket main body, a fixed valve, a guide which is engaged with the fixed valve and biased to be pressed against an inner surface of the socket main body, and a guide spring which biases the guide, and a plug with a plug main body, a movable valve, a valve spring, and a valve holder which supports the movable valve and the valve spring. When the plug is inserted into the socket, the guide moves rearward against a biasing force of the guide spring to connect a flow path between the plug and the socket. A fitted portion, which is fitted into the distal end of the plug, is disposed at the end portion of the guide. First seal members are disposed between the fitted portion and a distal end of the plug.

Abstract: The present invention provides a fluid coupling which can surely prevent liquid leakage, and reduce manufacturing cost and time. It includes a socket (11) which is provided with a socket main body (12), a fixed valve (21), a guide (30) which is engaged with the fixed valve (21) and is biased so as to be pressed against an inner surface of the socket main body (12), and a spring (4) which biases the guide (30), and a plug (51) which is provided with a plug main body (52), a movable valve (61), a spring (68), and a valve holder (71) which supports the movable valve (61) and the spring (62). When the plug (51) is inserted into the socket (11), the guide (30) moves rearward against a biasing force of the spring (49) so as to connect a flow path between the plug (51) and the socket (11). A fitted portion (35), which is fitted into the distal end of the plug (51), is disposed at the end portion of the guide (30).

Abstract: In the fluid coupling for connecting the fluid passages of a plug (1) and a socket (2), a valve (33), a valve holder (31) and a spring (32) disposed in a compressed state between the valve (33) and the valve holder (31) are accommodated inside each of the plug (1) and the socket (2) to be connected to each other the plug (1) is inserted into the socket (2), the valve (33) of the plug (1) and the valve (33) of the socket (2) make contact with each other so that the valves (33) are retracted resisting an urging force of the spring (32). This fluid coupling further includes conical members (32, 51) which form a conical external shape along a line connecting the outside diameter portion of the valve (33) and the outside diameter portion of the valve holder (31) when the valve (33) of the plug (1) and the valve (33) of the socket (2) make contact with each other, so that the springs (32) are compressed between the valve (33) and the valve holder (31).

Abstract: [Problems] To provide a low pressure loss type fluid coupling having a valve holder which has a large effective opening area and never drops the strength thereof. [Means to Solve] In the fluid coupling for connecting the fluid passages of the plug 1 and the socket 2, a valve 33, a valve holder 31 and a spring 32 disposed in a compressed state between the valve 33 and the valve holder 31 are accommodated inside each of a plug 1 and a socket 2 to be connected to each other liquid-tightly, and when the plug 1 is inserted into the socket 2, the valve 33 of the plug 1 and the valve 33 of the socket 2 make contact with each other so that the valves 33 are retracted resisting an urging force of the spring32.