Methods and apparatus are disclosed for a coupling nozzle for cryogenic fluid. An example nozzle comprises a flow body defining a conduit, an inlet, and an outlet. A pneumatic cylinder is configured to slide between an extended position and a contracted position. The pneumatic cylinder is coupled to and configured to actuate the flow body. A locking mechanism is configured to secure the coupling nozzle to a receptacle. A flow control assembly comprises a valve seat fixed to the flow body adjacent the inlet and a plug configured to slide. When the locking mechanism is locked and the pneumatic cylinder actuates to the extended position, the valve seat is to disengage from the plug to open the flow control assembly. When the locking mechanism is locked and the pneumatic cylinder actuates to the contracted position, the valve seat is to engage the plug to close the flow control assembly.

The first connector includes a main body, a first connecting surface, a rotating ring, and a restricting pin for prohibiting the rotation of the rotating ring relative to the first connecting surface, the rotating ring, when taking a predetermined rotational phase with respect to the second connector, the second connector to the abutting position, can be drawn in the axial direction, further, the second connector is engaged with a portion of the second connector by rotating relative to the first connecting surface in a state of being retracted to the abutting position to maintain a connection state, the restricting pin, when the second connector is retracted to the abutting position, the rotation of the rotating ring from the restricting position to allow the rotation of the allowable position.

The first connector includes a main body, a first connecting surface, a rotating ring, and a restricting pin for prohibiting the rotation of the rotating ring relative to the first connecting surface, the rotating ring, when taking a predetermined rotational phase with respect to the second connector, the second connector to the abutting position, can be drawn in the axial direction, further, the second connector is engaged with a portion of the second connector by rotating relative to the first connecting surface in a state of being retracted to the abutting position to maintain a connection state, the restricting pin, when the second connector is retracted to the abutting position, the rotation of the rotating ring from the restricting position to allow the rotation of the allowable position.

The present disclosure relates to coupling device and valve assembly for use with accessing the water flow in a fire hydrant. Specifically, the present disclosure relates to various coupling device and valve assemblies which are used as a quick connect and disconnect of a fire hose to the hydrant. Additionally, it is advantageous that the coupling device and valve assemblies also provide a self-sealing valve feature, which immediately stops the flow of water when the hose is disconnected from the hydrant. An advantage provided by the present coupling device and valve assemblies is that should a primary valve on a hydrant become unusable, the fire hose can be quickly disconnected from that hydrant and reconnected to a second hydrant without requiring a shutdown of the water grid feeding the disconnected hydrant.

A coupling device having an integrated stopcock for placement in a flow connection between a first line and a second line includes a carrier body having a connection for the second line, a plug part having a connection for the first line, and a rotary part being rotatable by the plug part, disposed in the carrier body between the connections and having an opening. The two connections are connected for flow through the opening in a rotated end position of the rotary part. A plug-and-rotate lock is formed between the plug part and the carrier body. The plug part is detachably plugged into the rotary part and can be rotated in the carrier body together with the rotary part. A device for supplying a flowable substance from a container to a discharge point is also provided.

A coupling device having an integrated stopcock for placement in a flow connection between a first line and a second line includes a carrier body having a connection for the second line, a plug part having a connection for the first line, and a rotary part being rotatable by the plug part, disposed in the carrier body between the connections and having an opening. The two connections are connected for flow through the opening in a rotated end position of the rotary part. A plug-and-rotate lock is formed between the plug part and the carrier body. The plug part is detachably plugged into the rotary part and can be rotated in the carrier body together with the rotary part. A device for supplying a flowable substance from a container to a discharge point is also provided.

A fluid injector for connecting a connection port of a container or tank includes a housing and a transmission mechanism disposed in the housing. The housing has a fluid inlet and a fluid outlet surrounded by an annular wall. A control valve is provided in the housing for opening and closing the fluid inlet. One end of the transmission mechanism is connected to the control valve, and another end of the transmission mechanism is connected to a movable post passing through the annular wall. When the control valve opens or closes the fluid inlet, the transmission mechanism is driven by the control valve, and the movable post extends out of the annular wall to be engaged with the connection port or retracts into the annular wall, thereby determining the connection state of the fluid injector and the connection port and ensuring that the movable post is exactly controlled.

Fluid connectors are described where one or more sensors are provided for sensing a connection state of the fluid connectors. The sensor(s) indicates that the fluid connector of the first fluid system is connected to the second fluid system prior to initiating fluid flow between the first and second fluid systems. The sensor(s) senses movements of one or more elements of the quick connect fluid connectors that are involved in the actual connection of the fluid connectors to the second fluid system. The elements that are sensed can be, for example, one or more cylindrical sleeves of the connector or a piston of the connector. Therefore, the connection state of the fluid connectors can be determined accurately.

A plumbing fitting couplable with a free-end portion of a pipe. The fitting has a chamber with an opening and an interior chamber wall with a circumferentially extending chamber groove, and an end bushing with an interior opening sized to receive the pipe free-end portion and an exterior wall portion having an outwardly projecting, circumferentially extending locking member within the chamber groove to resist movement of the end bushing out of the first chamber opening. A seal and gripper ring within the chamber seal with and releasably grip the pipe free-end portion. The end bushing interior opening has an end bushing interior wall portion sized to be engaged by the free-end portion of the pipe when within the end bushing interior opening to resist disengagement of the locking member from the chamber groove while the free-end portion of the pipe is within the end bushing interior opening.

A fluid connector that connects a first fluid system with a fluid port of a second fluid system for transferring fluids, including gaseous or liquid fluids, between the first and second fluid systems. The fluid connector can be used with differently configured, non-matching threaded fluid ports and allow for misalignment/tipping of the fluid connector to maintain a seal with the fluid port.