Hydraulic emergency valve

Claim 1

AN EMERGENCY VALVE FOR DISCHARGING LIQUID FROM A TANK TO WHICH ITS INTAKE END IS CONNECTED, SAID VALVE COMPRISING A VALVE BODY, A VALVE MEMBER TO CLOSE THE INTAKE END OF SAID VALVE BODY, A VALVE STEM OPERATIVE TO OPEN AND CLOSE SAID VALVE MEMBER, A GLAND DEPENDING EXTERIORLY FROM THE VALVE BODY, SAID VALVE STEM EXTENDING DOWNWARDLY THROUGH SAID VALVE BODY AND DEPENDENT GLANG AND EXTERNALLY THEREOF, AND VALVE MEMBER ACTUATING MEANS SUSPENDED FROM THE GLAND AND THUS ENTIRELY OUTSIDE THE VALVE BODY FOR COOPERATION WITH THE LOWER EXTERIOR END PORTION OF SAID VALVE STEM, WHEREBY TO RECIPROCATE SAID VALVE STEM TO OPEN AND CLOSE THE VALVE MEMBER, SAID ACTUATING MEANS COMPRISING A CYLINDER MEMBER AFFIXED TO AND EXTENDING FROM THE GLAND IN AXIAL ALIGNMENT THEREWITH AND THROUGH WHICH THE LOWER END OF THE VALVE STEM PASSES, A PISTON MEMBER AFFIXED TO THE VALVE STEM AND SLIDABLE WITHIN THE CYLINDER MEMBER, MEANS FOR DELIVERING HYDRAULIC FLUID INTO THE CYLINDER MEMBER BELOW THE PISTON MEMBER, WHEREBY TO RAISE THE VALVE STEM TO OPEN SAID VALVE MEMBER, SAID CYLINDER MEMBER HAVING A RADIALLY PROJECTED TOP PLATE CONNECTED THEREWITH, A RADIALLY PROJECTED FOOT PLATE AFFIXED TO SAID VALVE STEM IN DOWNWARDLY SPACED AWAY RELATION TO THE CYLINDER MEMBER, AND A PLURALITY OF COMPRESSION SPRINGS CIRCUMFERENTIALLY SPACED AROUND SAID