Hydraulic control systems including double action receiver apparatus

Claim 1

A SYSTEM FOR CONTROLLING THE RECIPROCATING DISPLACEMENTS OF A PISTON IN A CYLINDER DIVIDED BY SAID PISTON INTO TWO WORKING CHAMBERS WHICH SYSTEM COMPRISES, IN COMBINATION, A HIGH PRESSURE LIQUID INFLOW CONDUIT, AN OUTFLOW CONDUIT, A REVERSING DISTRIBUTING VALVE MECHANISM INCLUDING A CASING HAVING TWO DIFFERENT PORTIONS THEREOF IN COMMUNICATION WITH SAID INFLOW AND OUTFLOW CONDUITS RESPECTIVELY AND A VALVE MEMBER MOVABLE IN SAID CASING, TWO CONNECTING CONDUITS EXTENDING BETWEEN TWO DIFFERENT PORTIONS OF SAID CASING AND SAID WORKING CHAMBERS, RESPECTIVELY, SAID VALVE MEMBER BEING SWITCHABLE IN SAID CASING FROM ONE TO THE OTHER OF TWO POSITIONS, IN ONE OF WHICH IT PLACES IN COMMUNICATION ONE OF SAID CONNECTING CONDUITS WITH SAID INFLOW CONDUIT AND THE OTHER OF SAID CONNECTING CONDUITS WITH SAID OUTFLOW CONDUIT, AND IN THE OTHER OF WHICH IT REVERSES SAID COMMUNICATIONS, TWO DETECTOR DEVICES EACH COMPRISING A CASING, A SLIDE VALVE IN SAID LAST MENTIONED CASING ADAPTED TO DIVIDE IT INTO SEVERAL COMPARTMENTS TWO OF WHICH, A FIRST ONE AND A SECOND ONE, ARE OF VARIABLE VOLUME, SPRING MEANS BETWEEN EACH OF SAID DETECTOR DEVICE CASINGS AND THE CORRESPONDING SLIDE VALVE FOR RESILIENTLY OPPOSING INCREASE OF THE VOLUME OF SAID FIRST COMPARTMENT, CONDUIT MEANS FOR CONNECTING SAID FIRST CHAMBERS WITH SAID CONNECTING CONDUITS RESPECTIVELY, MEANS OPERATIVELY CONNECTED WITH SAID DETECTOR DEVICES, WITH SAID HIGH PRESSURE INLET CONDUIT AND WITH SAID REVERSING DISTRIBUTING VALVE MECHANISM FOR SWITCHING SAID REVERSING DISTRIBUTING VALVE MECHANISM FROM ONE OF SAID POSITIONS TO THE OTHER IN RESPONSE TO A RISE OF PRESSURE IN ONE OF SAID CONNECTING CONDUITS, AND CONDUIT MEANS FOR CONNECTING THE SECOND COMPARTMENT OF EACH ONE OF SAID DETECTOR DEVICES WITH THE CONNECTING CONDUIT CORRESPONDING TO THE OTHER OF SAID DETECTOR DEVICES.

Claim 2

A SYSTEM FOR CONTROLLING THE RECIPROCATING DISPLACEMENTS OF A PISTON IN A CYLINDER DIVIDED BY SAID PISTON INTO TWO WORKING CHAMBERS WHICH SYSTEM COMPRISES, IN COMBINATION, A HIGH PRESSURE LIQUID INFLOW CONDUIT, AN OUTFLOW CONDUIT, A REVERSING DISTRIBUTING VALVE MECHANISM INCLUDING A CASING HAVING TWO DIFFERENT PORTIONS THEREOF IN COMMUNICATION WITH SAID INFLOW AND OUTFLOW CONDUITS RESPECTIVELY AND A VALVE MEMBER MOVABLE IN SAID CASING, TWO CONNECTING CONDUITS EXTENDING BETWEEN TWO DIFFERENT PORTIONS OF SAID CASING AND SAID WORKING CHAMBERS, RESPECTIVELY, SAID VALVE MEMBER BEING SWITCHABLE IN SAID CASING FROM ONE TO THE OTHER OF TWO POSITIONS, IN ONE OF WHICH IT PLACES IN COMMUNICATION ONE OF SAID CONNECTING CONDUITS WITH SAID INFLOW CONDUIT AND THE OTHER OF SAID CONNECTING CONDUITS WITH SAID OUTFLOW CONDUIT, AND IN THE OTHER OF WHICH IT REVERSES SAID COMMUNICATIONS, TWO DETECTOR DEVICES EACH COMPRISING A CASING, A SLIDE VALVE IN SAID LAST MENTIONED CASING ADAPTED TO DIVIDE IT INTO SEVERAL COMPARTMENTS TWO OF WHICH, A FIRST ONE AND A SECOND ONE, ARE OF VARIABLE VOLUME, SPRING MEANS BETWEEN EACH OF SAID DETECTOR DEVICE CASINGS AND THE CORRESPONDING SLIDE VALVE FOR RESILIENTLY OPPOSING INCREASE OF THE VOLUME OF SAID FIRST COMPARTMENT, CONDUIT MEANS FOR CONNECTING SAID FIRST CHAMBERS WITH SAID CONNECTING CONDUITS RESPECTIVELY, MEANS OPERATIVELY CONNECTED WITH SAID DETECTOR DEVICES, WITH SAID HIGH PRESSURE INLET CONDUIT AND WITH SAID REVERSING DISTRIBUTING VALVE MECHANISM FOR SWITCHING SAID REVERSING DISTRIBUTING VALVE MECHANISM FROM ONE OF SAID POSITIONS TO THE OTHER IN RESPONSE TO A RISE OF PRESSURE IN ONE OF SAID CONNECTING CONDUITS, AND CONDUIT MEANS FOR CONNECTING THE SECOND COMPARTMENT OF EACH ONE OF SAID DETECTOR DEVICES WITH THE CONNECTING CONDUIT CORRESPONDING TO THE OTHER OF SAID DETECTOR DEVICES.