Chamber with extensible plug valve assembly

Claim 1

IN A GAS FLOW REGULATING VALVE FOR CONTROLLING THE DISCHARGE OF GAS FROM A CONDUIT TERMINAL INTO AN ENLARGED CHAMBER, THE COMBINATION COMPRISING: A BACK PLATE SECURED IN SPACED OUTER RELATION TO THE END OF SAID CONDUIT TERMINAL, A PLUG HAVING A BASE END AND AN APEX END AND HAVING A DIMINISHING CROSS-SECTIONAL AREA FROM SAID BASE END TO SAID APEX END, SAID PLUG BEING POSITIONED BETWEEN THE SAID BACK PLATE AND THE SAID CONDUIT TERMINAL WHEREBY AN ANNULAR GAS PASSAGEWAY IS DEFINED, A NORMALLY COLLAPSED, RESILIENT BELLOWS HAVING ONE END CONNECTED TO SAID BASE END OF SAID PLUG AND THE OTHER END CONNECTED TO SAID BACK PLATE WHEREBY THE SAID BACK PLATE, THE SAID BELLOWS AND THE SAID PLUG DEFINE A VALVE OPERATING CHAMBER, INLET CONDUIT MEANS SECURED TO SAID APEX END OF SAID PLUG FOR COMMUNICATING A PORTION OF THE SAID GAS TO SAID VALVE OPERATING CHAMBER AS AN OPERATING FLUID, OUTLET CONDUIT MEANS IN SAID BACK PLATE FOR DISCHARGING THE SAID OPERATING FLUID, EXTENSIBLE ALIGNMENT MEANS EXTENDING BETWEEN THE SAID INLET CONDUIT MEANS AND THE SAID OUTLET CONDUIT MEANS FOR MAINTAINING THE SAID PLUG SUBSTANTIALLY ALIGNED WITH THE LONGITUDINAL AXIS OF THE SAID CONDUIT TERMINAL, MEANS WITHIN SAID ENLARGED CHAMBER FOR SENSING A PRESSURE DIFFERENTIAL RELATED TO THE FLOW RATE OF SAID GAS FROM SAID CONDUIT TERMINAL, AND BLEED CONTROL MEANS RESPONSIVE TO A PRESSURE DIFFERENTIAL IN SAID ENLARGED CHAMBER FOR CONTROLLING THE DISCHARGE RATE OF SAID OPERATING FLUID FROM THE SAID OUTLET CONDUIT MEANS WHEREBY THE SAID ANNULAR GAS PASSAGEWAY IS REGULATED IN ACCORDANCE WITH DEVIATIONS FROM A PREDETERMINED VALUE OF SAID PRESSURE DIFFERENTIAL.