Abstract: A quick disconnect coupling for connecting together two conduits in a high pressure fluid-carrying system. The coupling includes a female part (coupler) and a male part (nipple) each provided with a flow through channel, and each provided with a cut-off valve. The nipple is designed to be inserted into the flow-through channel of the coupler to cause the two parts automatically to be firmly latched together and to be sealed to one another during a pre-mating condition, without opening cut-off valves in the nipple and coupler. This initial pre-mating action isolates any fluid contained in the two parts of the coupling from the environment. Then, an axial force applied to the outer housing of the coupler causes both the nipple and coupler valves to open to establish fluid flow through the coupling.

Abstract: A sealing mechanism for a pair of conduits held together by means of a frangible connector is described. Each conduit has a center pivoted butterfly valve with valve discs which are spring biased to a closed position. The valve discs are mutually abutting and normally hold each other open, but are released when the frangible connector is broken. Each disc is pivoted about an offset from a pivot support member, and the inner conduit walls are tapered between the open and closed positions of the disc so as to reduce the turning friction between the disc and the conduit walls. A mechanism for positively closing and latching the disc is a closed position is described. This mechanism is contained in a housing which is sealed off from the fluid containing portion of the conduit.

Abstract: A connector for connecting together two ends of a fluid-carrying line comprises two coupling halves. The female half includes a cylindrical female housing. A support sleeve is concentric with and mounted around part of the female housing, and the forward end is threaded to receive the male half. An actuator sleeve is around the support sleeve. A movable locking member in the form of balls are seated in opening through the support sleeve against the actuator sleeve. A trigger ring inside the support sleeve slides between a blocking position under the balls and an unblocking position releasing the balls. One surface of the actuator sleeve urges the balls against the trigger ring. The threaded forward end of the male half engages the threads of the female half. A nose section on the male half, which extends forward of the threads, engages a trigger actuator ring in the female half.