Flow regulator valves

Claim 1

AN HYDRAULIC FLOW REGULATOR COMPRISING IN COMBINATION ON OUTER HOUSING HAVING MEANS FOR SECURING SAID REGULATOR IN AN HYDRAULIC SYSTEM, A FIRST CONTROL ELEMENT, MEANS MOUNTING SAID ELEMENT WITHIN SAID HOUSING, ACCESS MEANS ACCOMMODATING THE PASSAGE OF HYDRAULIC FLUID INTO AND OUT OF SAID FIRST CONTROL ELEMENT, PORTS IN SAID FIRST CONTROL ELEMENT FOR COMMODATING THE PASSAGE OF HYDRAULIC FLUID THERETHROUGH INTO AND OUT OF SAID HOUSING, A SECOND CONTROL ELEMENT WITHIN SAID HOUSING, MEANS MOUNTING SAID SECOND CONTROL ELEMENT FOR MOVEMENT RELATIVE TO SAID FIRST CONTROL ELEMENT FROM NON-OPERATIVE POSITION REMOTE FROM SAID PORTS TO OPERATIVE PORT-CLOSING POSITION, MEANS NORMALLY MAINTAINING SAID SECOND ELEMENT IN NON-OPERATIVE POSITION REMOTE FROM SAID PORTS IN SAID FIRST ELEMENT FOR FREE FLOW OF HYDRAULIC FLUID THROUGH SAID REGULATOR, AND MEANS FOR MOVING SAID SECOND CONTROL ELEMENT RELATIVE TO SAID FIRST CONTROL ELEMENT FROM NON-OPERATIVE TO OPERATIVE POSITION WHEN THE FLOW OF HYDRAULIC FLUID IS IN A SELECTED THROUGH SAID REGULATOR WHEREBY FLUID FLOW THROUGH SAID PORTS IS RESTRICTED AND FROM OPERATIVE TO NON-OPERATIVE POSITION WHEN THE FLUID FLOW IS IN THE OPPOSITE DIRECTION FROM SAID SELECTED DIRECTION THROUGH SAID REGULATOR SUCH THAT PASSAGE OF FLUID THROUGH SAID REGULATOR IS RESTRICTED IN SAID SELECTION DIRECTION AND UNRESTRICTED IN SAID OPPOSITE DIRECTION, SAID LAST MENTIONED MEANS COMPRISING A FLANGED ELEMENT MOUNTED ON SAID SECOND CONTROL ELEMENT FOR LIMITED FREE MOVEMENT THEREALONG IN THE DIRECTION OF MOVEMENT OF SAID SECOND CONTROL ELEMENT , SAID FLANGED ELEMENT IN ONE LIMITING POSITION OF FREE MOVEMENT COOPERATING WITH SAID HOUSING TO ALLOW FREE FLOW OF FLUID THEREBY, AND IN ANOTHER LIMITING POSITION OF FREE MOVEMENT, COOPERATING WITH SAID HOUSING TO DEFINE A RESTRICTIVE ORIFICE.