Control valves

Claim 1

IN A VALVE, A BODY HAVING AN INLET, AND OUTLET, AND A VALVE SEAT THEREBETWEEN, A MOVABLE VALVE PLUG IN SAID BODY ARRANGED TO OPEN AND CLOSE UPON SAID VALVE SEAT TO CONTROL FLUID FLOW FROM SAID INLET TO SAID OUTLET, AND EXTENDING SHANK PORTION FORMED ON SAID VALVE PLUG, A HOLLOW GUIDE SLEEVE IN SAID BODY INTO WHICH SAID SHANK PORTION IS ADAPTED TO RECIPROCATE, INTERFITTING LUGS AND SLOTS ON SAID SHANK PORTION AND SAID GUIDE SLEEVE, THE LUGS AND SLOTS IN SAID GUIDE SLEEVE EXTENDING DOWNWARD FOR AT LEAST HALF THE LENGTH OF THE INTERIOR OF SAID GUIDE SLEEVE, AND THE LUGS AND SLOTS AROUND SAID SHANK PORTION EXTENDING UPWARD FOR AT LEAST HALF THE LENGTH OF SAID SHANK PORTION, A CUP-SHAPED BONNET ON SAID VALVE BODY, A FLANGE FORMED AROUND SAID GUIDE SLEEVE AT A POINT INTERMEDIATE THE LENGTH OF SAID GUIDE SLEEVE, SAID GUIDE SLEEVE FLANGE BEING CLAMPED BY SAID BONNET TO SAID VALVE BODY TO SUPPORT THE GUIDE SLEEVE AND FORM A SEAL TO PREVENT LEAKAGE OUTWARD FROM SAID BODY, THE PORTION OF SAID GUIDE SLEEVE EXTENDING ABOVE SAID FLANGE BEING NESTED WITHIN SAID CUP-SHAPED BONNET, AND THE LOWER PORTION PROJECTING INTO THE VALVE BODY, AN OPERATING STEM THREADED INTO SAID VALVE PLUG AND ITS ASSOCIATED SHANK PORTION, SAID OPERATING STEM EXTENDING THROUGH SAID GUIDE SLEEVE AND SAID BONNETT, COOPERATING MEANS ON SAID OPERATING STEM, SAID BONNET AND SAID GUIDE SLEEVE FOR PREVENTING SAID OPERATING STEM FROM MOVING LONGITUDINALLY WHILE BEING ROTATED, WHEREBY SAID VALVE PLUG IS MOVED INTO AND OUT OF OPERATIVE RELATION TO SAID VALVE SEAT, SAID INTERFITTING LUGS AND SLOTS BEING IN SLIDABLE RELATIONSHIP WITH ONE ANOTHER TO PREVENT ROTARY MOVEMENT OF SAID VALVE PLUG WHILE SAID OPERATING STEM IS BEING THREADED IN SAID VALVE PLUG, SAID SHANK PORTION BEING COMPLETELY RECESSED IN SAID GUIDE SLEEVE IN THE WIDE OPEN POSITION OF SAID VALVE PLUG AND SAID LUGS AND SLOTS BEING COMPLETELY INTERENGAGED FOR THEIR FULL LENGTH, AND AN O-RING SEAL ON SAID SHANK PORTION INTERMEDIATE THE ENDS THEREOF AND BELOW SAID LUGS AND SLOTS, SAID O-RING BEING IN SEALING ENGAGEMENT WITH THE WALLS OF SAID GUIDE SLEEVE IN ALL POSITIONS OF SAID VALVE PLUG.