A quick coupling set includes a socket and a mating plug. The socket has a rotation-restraining structure while the mating plug has a mating rotation-restraining structure. In the coupling of the socket and the mating plug, the rotation-restraining structure of the socket only allows the rotation-restraining structure of the mating plug to relatively rotate in a rotation direction, so as to complete the coupling of the socket and the mating plug.

A quick release coupling for providing a connection between a pair of hydraulic lines is provided. The coupling includes a male component has a fluid passage therethrough and includes a shank portion adapted to engage a first hydraulic line. The shank portion has a first port for establishing fluid communication between the first hydraulic line and the fluid passage. The shank portion also has a restraining mechanism adapted to engage the first hydraulic line and block a rotational movement and an axial movement of the male component relative to the first hydraulic line. The coupling also includes a coupling adapter connectable to the male component and having a fluid channel therethrough adapted to be in fluid communication with the fluid passage. The coupling adapter is adapted to engage a second hydraulic line and has a second port for establishing fluid communication between the second hydraulic line and the fluid channel.

A quick release coupling for providing a connection between a pair of hydraulic lines is provided. The coupling includes a male component has a fluid passage therethrough and includes a shank portion adapted to engage a first hydraulic line. The shank portion has a first port for establishing fluid communication between the first hydraulic line and the fluid passage. The shank portion also has a restraining mechanism adapted to engage the first hydraulic line and block a rotational movement and an axial movement of the male component relative to the first hydraulic line. The coupling also includes a coupling adapter connectable to the male component and having a fluid channel therethrough adapted to be in fluid communication with the fluid passage. The coupling adapter is adapted to engage a second hydraulic line and has a second port for establishing fluid communication between the second hydraulic line and the fluid channel.

A coupling for providing a connection and establishing fluid communication between fluid lines is provided. The coupling includes a housing defining an internal cavity with an open end, and a male component engageable within the internal cavity through the open end. The male component has a shank portion adapted to engage a fluid line. The coupling also has a nut securable to the housing and adapted to surround a portion of the shank portion and radially and axially restrain the shank portion within the internal cavity. The nut is further adapted to allow the male component to rotate with respect to the housing and the nut about a longitudinal axis of the shank portion. The coupling further includes a sealing ring provided about the shank portion which is adapted to at least partially block axial and radial movement of the male component relative to the nut and the housing.

A coupling for providing a connection and establishing fluid communication between fluid lines is provided. The coupling includes a housing defining an internal cavity with an open end, and a male component engageable within the internal cavity through the open end. The male component has a shank portion adapted to engage a fluid line. The coupling also has a nut securable to the housing and adapted to surround a portion of the shank portion and radially and axially restrain the shank portion within the internal cavity. The nut is further adapted to allow the male component to rotate with respect to the housing and the nut about a longitudinal axis of the shank portion. The coupling further includes a sealing ring provided about the shank portion which is adapted to at least partially block axial and radial movement of the male component relative to the nut and the housing.

A male or female orientated medical tubing or syringe connector that can be selectably locked in a threaded configuration or a breakaway configuration. The male connector includes opposing threaded sections and opposing non-threaded sections. The opposing threaded sections allow for the male connector's fully or partially threaded female counterpart to be screwed into place on attachment and unscrewed on detachment. The opposing unthreaded sections of the male connector allow for its partially threaded female counterpart to be engaged via a friction fit connection that does not require a screwing action. The male connector's opposing unthreaded sections also allows for its partially threaded female counterpart to be disengaged via a pulling force in the opposite direction of the male connector, which does not require an unscrewing action. This breakaway functionality helps to prevent patient harm if the patient's tubing becomes snagged.

A low-emission nozzle and receptacle coupling for cryogenic fluid is disclosed. A nozzle includes a body, a shaft, a poppet eat, and a poppet. The body includes an outer shell, body segment(s), and interior walls sealingly coupled together. At least one of the interior walls is coupled to the outer shell. The interior walls extend longitudinally back-and-forth in a zig-zag pattern to define an elongated conduction path between the chamber and an exterior of the nozzle to impede a heat leak between the chamber and the exterior. The shaft is housed within and slidably extends through the chamber. The poppet is coupled to the shaft and is configured to engage a receptacle poppet when the receptacle is coupled to the nozzle. The poppet is configured to engage the poppet seat in a closed position and be disengaged from the poppet seat in an open position.