Releasable fluid line coupling

Claim 1

FOR A TRACTOR HAVING A HYDRAULIC POWER LIFT SYSTEM AND A TRAILING IMPLEMENT SEPARABLY CONNECTED TO THE TRACTOR AND INCLUDING A HYDRAULIC DEVICE HAVING A FLEXIBLE FLUID CONDUIT EXTENDING FORWARDLY TO THE TRACTOR; COUPLING MEANS FOR CONNECTING THE TRACTOR HYDRAULIC SYSTEM TO THE CONDUIT, COMPRISING A COUPLING CARRIER MOUNTED ON THE TRACTOR AND HAVING A FORE-AND-AFT BORE OPENING AT FRONT AND REAR ENDS; A FRONT COUPLING PART HYDRAULICALLY CONNECTED TO THE TRACTOR HYDRAULIC SYSTEM AND COAXIALLY CARRIED IN THE CARRIER BORE FOR AXIAL SHIFTING BETWEEN FRONT AND REAR POSITIONS AND HAVING A FRONT PORTION EXPOSED AT THE FRONT OPENING OF THE CARRIER; A REAR COUPLING PART CONNECTED TO THE CONDUIT AND COAXIALLY TELESCOPICALLY FORWARDLY RECEIVABLE BY AND REARWARDLY SEPARABLE FROM THE FRONT PART; RELEASABLE MEANS INTERCONNECTING THE COUPLING PARTS IN THE FRONT POSITION OF SAID FRONT PART FOR REARWARD SHIFTING IN UNISON TO THE REAR POSITION OF SAID FRONT PART AND OPERATIVE AT SAID REAR POSITION TO ENABLE REARWARD SEPARATION OF SAID REAR PART FROM SAID FRONT PART; A FORE-AND-AFT SHIFTABLE ELEMENT ENGAGEABLE WITH THE FRONT PORTION OF THE FRONT COUPLING PART; MEANS MOVABLY MOUNTING SAID ELEMENT ON THE TRACTOR; AND TENSION MEANS CONNECTED TO SAID ELEMENT AND CONNECTIBLE TO A PORTION OF THE IMPLEMENT TO TRANSMIT A REARWARD FORCE TO SAID ELEMENT, UPON SEPARATION OF THE IMPLEMENT FROM THE TRACTOR, TO SHIFT SAID ELEMENT REARWARDLY TO ACT ON SAID EXPOSED PORTION OF THE FRONT COUPLING PART FOR SHIFTING SAID COUPLING PARTS REARWARDLY RELATIVE TO THE CARRIER TO THE AFORESAID REAR POSITION SO AS TO RELEASE SAID REAR PART.