Patent ID: 8342209
Filing Date: 2013-01-01
Classification: F16L

Abstract:
1. A plug for a fluid-transfer coupling device that connects the plug and a socket to each other thereby communicating respective flow paths in the socket and the plug with each other, the plug comprising at least: a plug forward part having a valve body and an inner passage formed to allow a passage of fluid; a plug collar arranged adjacent to the plug forward part in an axial direction of the plug; an inner spacer having an inner passage formed to communicate with the inner passage of the plug forward part and inserted into a portion of the plug forward part and into the plug collar; a flange formed on a proximal end of the plug to connect the plug to a conduit, and a nut, which is coaxial to the plug, arranged around an outer circumferential surface at a proximal end of the plug forward part and an outer circumferential surface at a distal end of the plug collar to fix them together; wherein the plug collar and the flange are made from metal; and wherein an O-ring, which is coaxial to the plug, is arranged between the plug forward part and the inner spacer.