Demountable core valve

Claim 1

A VALVE ADAPTED TO BE INSTALLED IN A CONDUIT COMPRISING A VALVE BODY INCLUDING A FLUD CONFINING BORE ADAPTED TO BE AXIALLY ALIGNED WITH SAID CONDUIT AND EXTENSION MEANS ON SAID VALVE BODY ADAPTED TO PROJECT BEYOND SAID CONDUIT, A VALVE CORE ASSEMBLY REMOVABLY MOUNTABLE IN SAID VALVE BODY INCLUDING BEARING MEANS IN SAID VALVE BODY AND SAID EXTENSION MEANS DIAMETRICALLY OPPOSITE ONE FROM THE OTHER, A ROTATABLY MOUNTED SHAFT JOURNALED IN AND EXTENDING THROUGH SAID FLUID CONFINING BORE AND PROJECTING THROUGH SAID EXTENSION MEANS, A DISC VALVE MOUNTED ON SAID SHAFT AND PIVOTABLE ABOUT SAID SHAFT WITHIN SAID FLUID CONFINING BORE OF AN EXTERIOR DIMENSION CORRESPONDING TO THE FLUID CONFINING BORE AND ADAPTED TO REGULATE THE FLOW OF FLUID THROUGH SAID BORE, A RETAINING ASSEMBLY OVERLYING SAID CORE ASSEMBLY AND REMOVABLY SECURED TO SAID EXTENSION MEANS TO BIAS SAID CORE ASSEMBLY DOWNWARD IN SAID VALVE BODY, MEANS ASSOCIATED WITH SAID SHAFT BEYOND SAID EXTENSION MEANS FOR IMPARTING ROTATION TO SAID SHAFT AND PIVOTAL ROTATION TO SAID DISC VALVE INCLUDING A GEAR WHEEL MOUNTED ON SAID SHAFT, A WORM GEAR MESHING WITH SAID GEART WHEEL AND IMPARTING ROTATION THERETO, SAID WORM GEAR BEING MANUALLY ROTATABLE TO EFFECT ROTATION OF SAID SHAFT AND DISC VALVE, AND ANTIBLACKLASH MEANS ON SAID VALVE INCLUDING A ROTATABLE ECCENTRIC CAGE CONNECTED TO SAID WORM GEAR, SAID CAGE HAVING A FIRST POSITION WHEREBY SAID GEARS WILL MESH AND ROTATE TOGETHER AND A SECOND LOCKING POSITION WHEREBY SAID WORM GEAR WILL BE MOVED TOWARD SAID GEAR WHEEL TO CREATE A FRICTION INTERFERENCE WITH SAID GEAR WHEEL AND PREVENT MOVEMENT OF SAID GEAR WHEEL THEREBY PREVENTIN UNWANTED MOVEMENT OF SAID SHAFT AND SAID DISC VALVE.