Fluid line coupling

Claim 1

IN COMBINATION: SUPPORT MEANS INCLUDING A COUPLING CARRIER; A FIRST COUPLING PART CARRIED BY THE CARRIER FOR FORE-AND-AFT SHIFTING BETWEEN FRONT AND REAR POSITIONS AND NORMALLY DISPOSED IN SAID FRONT POSITION, SAID PART HAVING A FORE-AND-AFT BORE THEREIN OPENING AT THE REAR END THEREOF AND SAID BORE HAVING A VALVE SEAT THEREIN FORWARDLY OF SAID REAR END, AND A VALVE IN SAID BORE BIASED REARWARDLY TO CLOSE SAID SEAT; A SECOND COUPLING PART COAXIALLY FORWARDLY RECEIVED IN SAID BORE AND HAVING A FRONT END NORMALLY CLOSELY SPACED REARWARDLY OF SAID FIRST PART SEAT, SAID SECOND PART HAVING AN AXIAL BORE THEREIN INCLUDING A VALVE SEAT AT SAID FRONT END AND A VALVE IN SAID SECOND PART BORE BIASED FORWARDLY TO CLOSE SAID SECOND PART SEAT, SAID VALVES BEING NORMALLY EXPOSED TO EACH OTHER THROUGH THEIR RESPECTIVE SEATS IN CLOSELY AXIALLY SPACED APART RELATION; RELEASABLE MEANS NORMALLY INTERCONNECTING THE COUPLING PARTS AGAINST AXIAL SEPARATION SO THAT SAID TWO PARTS ARE SHIFTABLE REARWARDLY IN UNISON TO THE AFORESAID REAR POSITION, SAID RELEASABLE MEANS BEING OPERATIVE WHEN SAID REAR POSITION IS REACHED TO RELEASE THE SECOND PART AXIALLY REARWARDLY FROM SAID FIRST PART; A VALVE OPERATOR CARRIED BY THE FIRST COUPLING PART FOR MOVEMENT BETWEEN FIRST AND SECOND POSITIONS AND INCLUDING AN INTERNAL PORTION TRANSVERSE TO THE AXIS OF