Lubricated plug valve

Claim 1

A LUBRICATED PLUG VALVE FOR USE ON HIGH PRESSURE FLUID LINES; (A) THE COMBINATION OF A VALVE CASING; (B) A PORTED VALVE PLUG ROTATABLY MOUNTED IN SAID CASING PROVIDED WITH LUBRICATION MEANS; (C) ACTUATING MEANS FOR ROTATING SAID PLUG; (D) AN AXIALLY ADJUSTABLE RESILIENTLY MOUNTED OPERATING STEM SEPARATE FROM AND ENGAGEABLE WITH SAID PLUG TO EFFECT SAID ROTATION OF THE PLUG; (E) THE SAID STEM HAVING AN UPPER END PORTION PROJECTING OUTWARDLY FROM THE SAID CASING; (F) RESILIENT MEANS INTERPOSED BETWEEN SAID STEM AND PLUG TO SUPPORT SAID STEM; (G) THE SAID RESILIENT MEANS BEING MOUNTED BETWEEN SAID STEM AND PLUG AT THE LOCATION AT WHICH SAID ENGAGEMENT OF THE STEM WITH THE PLUG IS PROVIDED; (H) AN ANNULAR THREADEDLY ADJUSTABLE RETAINING BUSHING MOUNTED IN A THREADED RECESS OF THE SAID CASING WHEREBY THE AXIAL POSITION OF THE SAID STEM IS SET IN RELATION TO SAID PLUG; (I) THE SAID BUSHING ENCLOSING A LONGITUDINAL PORTION OF SAID OPERATING STEM WITHIN SAID CASING AND RESTRAINING SAID STEM AGAINST SUBSTANTIAL AXIAL MOVEMENT WHILE ADJUSTING THE COMPRESSION LOAD ON SAID RESILIENT MEANS TO PERMIT PREDETERMINED AXIAL MOVEMENT OF SAID PLUG IN A DIRECTION TOWARD SAID STEM; (J) ANNULAR SEALING RECESS MEANS DISPOSED BETWEEN A PERIPHERAL PORTION OF SAID OPERATING STEM AND AN INNER ANNULAR SURFACE OF SAID ADJUSTABLE BUSHING; (K) PACKING IN SAID ANNULAR RECESS MEANS; (L) MEANS IN AN END PORTION OF SAID STEM FOR INJECTING THE SAID PACKING INTO SAID ANNULAR RECESS MEANS TO URGE SAID PACKING INTO SEALING ENGAGEMENT WITH SAID STEM AND BUSHING TO PREVENT LEAKAGE OF LINE FLUID THEREPAST; (M) THE SAID INJECTION MEANS FOR SUPPLYING THE SAID PACKING TO THE SAID ANNULAR RECESS MEANS BEING RADIALLY EXTENDING AND LOCATED IN SAID STEM WHEREBY TO AVOID THE EXERTION OF A SUBSTANTIAL AXIAL FORCE ON SAID VALVE PLUG; (N) A SECOND ANNULAR SEALING RECESS MEANS WITHIN SAID CASING DISPOSED BETWEEN SAID CASING THREADED RECESS AND THE THREADED PORTION OF SAID BUSHING WITHIN SAID CASING RECESS COMMUNICATING WITH SAID FIRST NAMED ANNULAR SEALING RECESS MEANS; (O) THE SAID PACKING INJECTION MEANS INCLUDING A SECOND RADIALLY EXTENDING MEANS, THE LATTER MEANS BEING IN SAID BUSHING AND CONNECTING SAID FIRST AND SECOND ANNULAR RECESS MEANS; (P) MEANS WITHIN THE CASING COOPERATING WITH THE SAID PACKING MEANS AND SUPPLEMENTING THE SAID ANNULAR RECESS SEALING MEANS FOR LUBRICATING SAID VALVE PLUG TO MOVE THE LATTER MEMBER LIMITEDLY AXIALLY IN A DIRECTION TOWARD SAID STEM AND SAID RESILIENT MEANS.