Coupling having pin and finger clamping means with lock

Claim 1

A LOCKABLE COUPLING COMPRISING: A FIRST AND A SECOND TUBULAR BODY, SAID BODIES BEING COAXIAL AND IN A TELESCOPED RELATION; AND A RELEASABLE LOCK FOR PREVENTING THE SEPARATION OF SAID TWO BODIES ALONG THE AXIS, COMPRISING A PIN ATTACHED TO A FIRST OF THE BODIES, AN ANNULAR CLAMP RING CIRCUMSCRIBING THE SECOND OF SAID BODIES, SAID CLAMP INCLUDING A RELEASABLE LOCK HAVING A PAIR OF ARMS EACH ATTACHED AT ONE OF ITS ENDS TO THE SEDOND BODY AND EXTENDING IN THE SAME GENERAL AXIAL DIRECTION AND TOWARD SAID FIRST BODY, SAID ARMS HAVING FREE ENDS, AND AN INSIDE AND AN OUTSIDE SURFACE, THE INSIDE SURFACES FACING EACH OTHER AND THE OUTSIDE SURFACES BEING ON OOPPOSITE SIDES OF THE PAIR OF ARMS, A SHOULDER ON EACH INSIDE SURFACE ADJACENT TO THE FREE END, EACH INSIDE SURFACE FORMING A RELIEF BOUNDED AT ONE END BY ITS RESPECTIVE SHOULDER, THE FREE ENDS BEING SPACED APART WHEN THE ARMS ARE IN THEIR RELAXED CONDITION, AND A TONGUE ADAPTED TO STAND BETWEEN THE INSIDE SURFACES AND HOLD THEM APART AGAINST RESISTANCE OF THE ARMS THEREBY TO ENABLE THE PIN TO ENTER BETWEEN THE FREE ENDS, THE PIN BEING ADAPTED TO FORCE THE TONGUE FROM BETWEEN THE ARMS, AND AN AXIALLY MOVABLE LATCH COMPRISING A PAIR OF SPACED-APART SURFACES ADAPTED TO STRADDLE THE ARMS AND CONTACT THEIR OUTSIDE SURFACES IN ORDER TO PRESS THE ASRMS TOWARD EACH OTHER SO THAT THE SHOULDERS EMBRACE THE PIN TO TRAP THE SAME AT ONE AXIAL POSITION OF THE LATCH, AND TO LEAVE FREE THE OUTSIDE SURFACES IN ANOTHER AXIAL POSITION.