Valve unit

Claim 1

A VALVE MECHANISM ADAPTED TO CONNECT A FIRST SUPPLY HIGH PRESSURE FLUID CONDUIT WITH A SECOND OUTLET HIGH PRESSURE FLUID CONDUIT COMPRISING, A PLUG PART ADAPTED TO BE CONNECTED TO ONE OF THE CONDUITS AND HAVING A FIRST FLUID PASSAGE THERETHROUGH AND A SOCKET PART FOR RECEIVING SAID PLUG PART FOR CONNECTION THERETO AND ADAPTED TO BE CONNECTED TO THE OTHER OF SAID CONDUITS AND HAVING A SECOND FLUID PASSAGE THERETHROU/GH COMMUNICATING WITH SAID FIRST PASSAGE WHEN SAID PARTS ARE CONNECTED, ONE OF SAID PARTS INCLUDING A SELF-CLOSING VALVE MEMBER LOCATED IN ONE OF SAID PASSAGES AND HAVING A CLOSED POSITION WHEN SAID PARTS ARE DISCONNECTED AND AN OPEN POSITION FOR ALLOWING FLUID FLOW THROUGH SAID PASSAGES WHEN SAID PARTS ARE CONNECTED, SAID VALVE MEMBER BEING ACTED UPON BY FLUID PRESSURE TO URGE IT TO ITS CLOSED POSITION, MEANS ON THE OTHER PART FOR MOVING SAID VALVE MEMBER TO ITS OPEN POSITION AND FOR MAINTAINING IT IN ITS OPEN POSITION AGAINST SAID FLUID PRESSURE WHEN SAID PARTS ARE CONNECTED, AND A SLIDE VALVE MEANS FORMING A PORTION OF SAID ONE OF SAID PARTS AND ADAPTED TO BE CONNECTED TO SAID SUPPLY CONDUIT AND HAVING A SLIDE VALVE MEMBER MOVABLE INDEPENDENTLY OF SAID VALVE MEMBER AND WHEN SAID PARTS ARE CONNECTED BETWEEN AN OPEN POSITION DIRECTING FLUID FLOW THERETHROUGH TO ACT ON SAID VALVE TO URGE IT TO ITS CLOSED POSITION AND A CLOSED POSITION BLOCKING THE FLOW OF FLUID THERETHROUGH TO BLOCK THE FLOW OF HIGH PRESSURE FLUID THERETHROUGH ACTING ON SAID VALVE.