Throttling and shut-off valve

Claim 1

A THROTTLING AND SHUT-OFF VALVE COMPRISING A BODY HAVING DIAMETRICALLY OPPOSED INLET AND OUTLET PORTS, SAID BODY HAVING AN UPSTANDING SECTION WHICH IS PROVIDED WITH AN INTERNALLY THREADED SURFACE, THERE BEING AN INWARDLY DISPOSED SHOULDER IN THE UPPER PORTION OF SAID UPSTANDING SECTION, SAID SHOULDER HAVING A CENTRAL APERTURE THEREIN, PACKING ARRANGED ABOVE SAID SHOULDER, A FOLLOWER ABOVE SAID PACKING, A CAP MOUNTED ON THE UPSTANDING SECTION OF SAID BODY, A STEM EXTENDING THROUGH SAID CAP, A HANDLE CONNECTED TO THE UPPER END OF SAID STEM, SAID STEM INCLUDING A LOWER ENLARGED PORTION WHICH IS THREADED FOR A PORTION OF ITS LENGTH FOR THREADEDLY ENGAGING THE THREADED SURFACE IN THE INTERIOR OF THE UPSTANDING SECTION OF THE BODY; SAID STEM FURTHER INCLUDING TAPERED SURFACE MERGING INTO A CYLINDRICAL SECTION, AND A TAPERED TIP ON THE LOWER END OF THE STEM, A CYLINDRICAL INTERNALLY THREADED FLANGE PORTION DEPENDING FROM SAID BODY; A SEAT MEMBER HAVING AN UPPER THREADED SECTION THREADEDLY ENGAGING SAID FLANGE PORTION, SAID SEAT MEMBER FURTHER INCLUDING AN INTERMEDIATE TAPERED SECTION AND A LOWER ENLARGED SECTION, THERE BEING AN ANNULAR GROOVE IN THE UPPER SECTION OF SAID SEAT MEMBER, A PORT IN THE UPPER SECTION OF SAID SEAT MEMBER COMMUNICATING WITH SAID GROOVE, THE UPPER SECTION OF SAID SEAT MEMBER HAVING A VERTICALLY DISPOSED RECESS THEREIN WHICH COMMUNICATES WITH SAID LAST NAMED PORT, SAID BODY FURTHER INCLUDING AN INNER WALL PORTION WHICH HAS A PASSAGEWAY AND AN OPENING THEREIN, SAID PASSAGEWAY ESTABLISHING COMMUNICATION BETWEEN THE INLET PORT OF THE BODY AND THE GROOVE IN THE SEAT MEMBER, A CIRCULAR PACKING ELEMENT ARRANGED ABOVE SAID SEAT MEMBER, AND A LOAD RING POSITIONED ABOVE SAID PACKING ELEMENT.