Sealing means for spindles of fluid valves

Claim 1

A SEALING MEANS FOR SPINDLES OF HIGH PRESSURE FLUID VALVES, COMPRISING: A VALVE SPINDLE HAVING A CYLINDRICAL SEALING PORTION; A SPINDLE BARREL COAXIALLY DISPOSED AROUND THE SEALING PORTION OF SAID VALVE SPINDLE AND IN WHICH SAID SPINDLE IS GUIDED AND DISPOSED FOR VALVE ACTUATING MOVEMENT; A COAXIAL RECESS IN THE OUTER END OF SAID SPINDLE BARREL HAVING A CYLINDRICAL PORTION AND A THREADED PORTION; A SEAL BACKING PLUG ON SAID SPINDLE BARREL AND THREADEDLY ENGAGING SAID THREADED PORTION; A COMPRESSION TYPE COMPENSATING SPRING DISPOSED AROUND SAID VALVE SPINDLE AND SEATED ON SAID PLUG; A PLASTIC SEALING MEMBER OF CONICAL FRUSTUM FORM, HAVING AN AXIAL CYLINDRICAL BORE, DISPOSED IN SAID RECESS AND HAVING A WALL DISPOSED AROUND SAID VALVE SPINDLE WITH ITS THINNEST WALL PORTION DIRECTED TOWARD SAID SPRING; SEALING MEMBER MADE OF A PLASTIC MATERIAL CAPABLE OF LIMITED COLD FLOWING UNDER PRESSURE AND HAVING AN ANNULAR FLANGE AT ITS THICKEST WALL PORTION; A FLOWABLE MEDIUM HAVING A CYLINDRICAL OUTER SURFACE AND A TAPERED AXIAL BORE ADAPTED TO FIT THE CONICAL SURFACE OF SAID SEALING MEMBER, DISPOSED AROUND THE WALL PORTION OF SAID SEALING MEMBER AND SUBSTANTIALLY FILLING THE SPACE BETWEEN THE WALL OF SAID WALL PORTION; A PRESSURE APPLICATION WASHER OPERATIVELY DISPOSED BETWEEN SAID MEDIUM AND SAID SPRING AND COACTING TO POSITION SAID FLUID MEDIUM IN INTIMATE CONTACT WITH SAID SEALING MEMBER INCLUDING THE FREE FACE OF SAID ANNULAR FLANGE