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: A fluid coupling includes and houses, in a plug and a socket: valves; springs that bias the valves so as to bring the valves into pressure contact with valve seats; and spring holders which position and hold the springs. When the plug is inserted into the socket, the valves abut against each other and are retracted, and flow paths in the plug and the socket are connected to each other. Each of the valves includes: a largest diameter portion that abuts against an inner circumferential surface of the plug or the socket and positions the valve in an axial direction thereof; and inclined surfaces reduced in diameter from the largest diameter portion toward both sides in the axial direction.

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: The fluid coupling includes and houses, in a plug and a socket: valves; springs that bias the valves so as to bring the valves into pressure contact with valve seats; and spring holders which position and hold the springs. When the plug is inserted into the socket, the valves abut against each other and are retreated, and flow paths in the plug and the socket are connected to each other. Each of the valves includes: a largest diameter portion that abuts against an inner circumferential surface of the plug or the socket and positions the valve in an axial direction thereof; and inclined surfaces reduced in diameter into a conic shape from the largest diameter portion toward both sides in the axial direction.