Hydraulic operator for reciprocating gate valves

Claim 1

A COMBINED THROUGH CONDUIT GATE AND HYDRAULIC OPERATOR COMPRISING: A THROUGH CONDUIT GATE VALVE FORMED OF A HOUSING HAVING A BORE THERETHROUGH WHICH IS INTERSECTED BY A VALVE CHAMBER; A RECIPROCATING TWO-PIECE VALVE MEMBER ASSEMBLY LOCATED IN SAID VALVE CHAMBER HAVING A PASSAGE WHICH IN THE OPEN POSITION ALIGNS WITH THE BORE AND A SOLID PORTION WHICH IN THE CLOSED POSITION BLOCKS FLOW THROUGH THE BORE AND IN BOTH POSITIONS EXPANDS TO SEALINGLY ENGAGE WITH BOTH THE UPSTREAM AND DOWNSTREAM SEATS AND COLLAPSES PRIOR TO MOVING FROM ONE POSITION TO ANOTHER; AN OPERATING STEM ATTACHED TO THE PASSAGE CONTAINING END OF SAID VALVE MEMBER TO MOVE SAID VALVE MEMBER FROM ONE POSITION TO ANOTHER, SAID STEM EXTENDING PAST THE TOP OF THE HOUSING; A BONNET CLOSING THE VALVE CHAMBER AND PROVIDED WITH A PACKING BOX HAVING RENEWABLE PLASTIC PACKING THROUGH WHICH THE OPERATING STEM EXTENDS; A HYDRAULIC CYLINDER OPERATOR CONNECTIVELY ATTACHED TO THE OPERATING STEM OF SAID VALVE COMPRISING: (A) A BASE MEMBER FOR THE OPERATOR HAVING A PORTION THAT PERMITS IT BEING TELESCOPED OVER THE BONNET OF THE VALVE, A SEALED PASSAGE FOR THE STEM AND AN ANNULAR PORTION ATTACHED TO THE VALVE, (B) MEANS FORMED BY THE BONNET AND BASE MEMBER TO SUPPLY PLASTIC PACKING TO THE PACKING BOX IN THE BONNET, (C) A HOLLOW CYLINDRICAL SLEEVE HAVING ITS CENTRAL AXIS CONCENTRIC WITH THE OPERATING STEM POSITIONED OVER THE ANNULAR PORTION OF THE BASE MEMBER,