Patent ID: 6945477

Claim:
A coupling device, comprising: a nozzle including a nozzle collar and handle assembly fixed together, and a valve body and fitting fixed together, the nozzle collar and handle assembly outwardly surrounding and rotatably supported with respect to the valve body and fitting, the valve body including an internal valve, and the collar having helical channels with entrance openings at a downstream end of the collar and opening outwardly along an exterior surface thereof; and a receptacle mateable with the nozzle, the receptacle also including a valve body including an internal valve, and a collar radially outwardly disposed from the valve body and defining therewith an annular cavity to receive the collar of the nozzle; the valve body of the nozzle being received in the valve body of the receptacle, the collar of the receptacle including a series of radial locking devices spaced along an interior surface of the collar and received in the helical channels of the nozzle to secure the nozzle to the receptacle when the nozzle is rotated in one direction with respect to the receptacle during connect, and wherein the channels have a geometry along their length which causes the radial locking devices to be retained along the channels in a vent position when the nozzle is rotated in an opposite direction with respect to the receptacle during disconnect.