Relieving device for multiple stage compressors

Claim 1

A PRESSURE RELIEVING DEVICE FOR MULTIPLE STAGE COMPRESSORS OF THE TYPE INCLUDING AT LEAST FIRST AND SECOND CYLINDERS ARRANGED IN SERIES, A FIRST COOLER CONNECTED IN SERIES BETWEEN SAID CYLINDERS AND RECEIVING A PRODUCT OF THE FIRST CYLINDER AND COOLING THE SAME PRIOR TO THE DELIVERY THEREOF TO THE SECOND CYLINDER, A FINAL COOLER CONNECTED TO THE SECOND CYLINDER FOR RECEIVING THE PRODUCT FROM THE SECOND CYLINDER AND COOLING THE SAME, A CONTAINER CONNECTED TO SAID FINAL COOLER FOR RECEIVING THE COOLED PRODUCT THEREFROM, A CHECK VALVE DISPOSED INTERMEDIATE SAID FINAL COOLER AND SAID CONTAINER, A RELIEF VALVE ON SAID FINAL COOLER OF THE PRESSURE MAINTAINED TYPE, A CONDUIT FROM SAID FIRST COOLER TO SAID RELIEF VALVE WITH THE PRESSURE IN SAID FIRST COOLER REACTING ON SAID RELIEF VALVE TO NORMALLY MAINTAIN SAID RELIEF VALVE IN A CLOSED POSITION, AND A RELIEF VALVE ON SAID FIRST COOLER FOR RELIEVING THE PRESSURE THEREIN, THE RELIEF OF PRESSURE WITHIN SAID FIRST COOLER OPERATING TO OPEN SAID FINAL COOLER RELIEF VALVE TO RELIEVE SAID FINAL COOLER, AND MEANS CONNECTED TO SAID FIRST COOLER RELIEF VALVE FOR OPENING THE SAME UPON THE STOPPING OF THE COMPRESSOR.