US Patent 9032997 Fluid coupling

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.