Abstract: A spring-loaded coupling device for releasably interconnecting confronting ends of first and second fluid carrying conduits is provided. A pair of symmetrical arcuate coupling halves are pivotally jointed together at first adjacent ends for circumferentially surrounding the conduit ends. A latch is mounted adjacent the opposite end of one of the halves. This latch includes a flange having a slot opening outwardly and an outwardly extending flat spring lock terminating in an end surface. A toggle is provided which has a first end pivotally mounted adjacent the opposite end of the other of the halves, and has a second end extendable longitudinally beyond the opposite end of the first of the halves. The toggle includes a locking pin adjacent the second end of the toggle and engageable with the slot when the coupling halves are closed around the sleeve and has a spring urging the toggle to pivot in a direction to move the locking pin into the slot.