Packed stem valve

Claim 1

FOR USE IN A REPACKABLE VALVE FOR CONTROLLING A LIQUID IN COMBINATION, A VALVE MEMBER OPERABLE TO A FIRST POSITION OPENING SAID VALVE AND TO A SECOND POSITINO CLOSING SAID VALVE, A TWO-PART SEPARABLE VALVE STEM OPEABLE AXIALLY FOR ACTUATING SAID VALVE MEMBER TO SAID TWO POSITIONS, ONE PART OF SAID STEM COMPRISING A VALVE SPINDLE OPERABLE AXIALLY IN USE UNDER CONTROL OF A THERMOSTATIC ACTUATOR FOR ACTUATING SAID VALVE MEMBER AND DISCONNECTABLE AND CONNECTABLE WITH THE OTHER PART OF SAID VALVE STEM, A STUFFING BOX HAVING TWO COAXIAL RECESSES AND IN USE DISPOSED CIRCUMFERENTIALLY OF SAID VALVE SPINDLE WITH SAID VALVE SPINDLE EXTENDING AXIALLY THERETHROUGH WITH SAID RECESSES DISPOSED CIRCUMFERENTIALLY OF SAID VALVE SPINDLE AND AXIALLY SPACED THEREON, AN ANNULAR PACKING IN ONE OF SAID RECESSED OF SAID STUFFING BOX DISPOSED CIRCUMFERENTIALLY OF SAID SPINDLKE TO EFFECT A SEAL THEREWITH TO PRECLUDE LIQUID FLOW AXIALLY OF SAID VALVE SPINDLE IN A DIRECTION EXTERNALLY OF SAID VALVE, AN ANNULAR FILTER DISPOSED IN THE OTHER OF SAID RECESSES REMOVALBE FROM SAID OTHER RECESSES WHEN SAID STUFFING BOX IS REMOVED FROM THE VALVE AND DISPOSED CIRCUMFERENTIALLY OF SAID SPINDLE AXIALLY INWARDLY OF PACKING TO FILTER ANY LIQUID LEAKAGE AXIALLY OF SAID VALVE SPINDLE TO REDUCE DEPOSIT OF SOLID AND SOLIDIFIABLE MATERIALS FROM SAID LIQUID ONTO SAID PACKING, AND REMOVABLE GLAND REMOVABLY HOLDING SAID PACKING IN SAID STUFFING BOX AND SAID FILTER COMPRISING AN IMPREGNANT TO INCREASE THE FILTERING EFFECTIVENESS OF SAID FILTER AND FOR LUBRICATING SAID FILTER.