Gaseous fuel carbureting system

Claim 1

IN A VAPOR FUEL CARBURETOR APPARATUS FOR INTERNAL COMBUSTION ENGINES COMPRISING IN COMBINATION AN ENGINE INTAKE STACK HAVING A FUEL INLET, A PRESSURE REGULATOR ADAPTGED TO RECEIVE VAPOR FUEL AT AN INTERMEDIATE INTAKE PRESSURE FOR DISCHARGING THE FUEL TO THE INTAKE STACK OF THE ENGINE AT A RELATIVELY LOW CONSTANT PRESSURE, SAID PRESSURE REGULATOR COMPRISING A CONTROL VALVE FOR REDUCING FUEL PRESSURE DISCHARGING TO THE INTAKE STACK, A MAIN DIAPHRAGM CONNECTED TO THE VALVE HAVING ONE SIDE THEREOF COMMUNICATING WITH THE AIR IMPACT PRESSURE OF THE INTAKE STACK AND THE OPPOSITE SIDES COMMUNICATING WITH THE REDUCED FUEL PRESSURE, SAID MAIN DIAPHRAGM RESPONSIVE TO A BALANCE OF FORCES PROVIDED BY THE PRESSURE DIFFERENTIAL ACROSS THE MAIN DIAPHRAGM AND THE PRESSURE DIFFERENTIAL ACROSS THE VALVE FOR MOVEMENT OF THE VALVE TO ALTERNATE POSITIONS OF OPEN AND CLOSE, A PILOT DIAPHRAGM OPERATIVELY CONNECTED TO THE CONTROL VALVE AND ADAPTED TO GENERATE A VARIABLE BALANCING FORCE FOR PARTIALLY BALANCING OUT THE PRESSURE DIFFERENTIAL ACROSS THE REDUCING CONTROL VALVE, A BALANCING CHAMBER ON ONE SIDE OF THE PILOT DIAPHRAGM, MEANS PROVIDING COMMUNICATION BETWEEN THE INTAKE FUEL PRESSURE AND THE BALANCING CHAMBER, MEANS PROVIDING COMMUNICATION BETWEEN THE BALANCING CHAMBER AND THE REDUCED FUEL PRESSURE UNDER OPERATING CONDITIONS OF THE ENGINE, SAID LAST MENTIONED MEANS COOPERATING WITH THE FIRST MENTIONED MEANS TO PROVIDE A BALANCING PRESSURE IN THE BALANCING CHAMBER COOPERATING WITH THE PRESSURES ON ONE SIDE OF THE MAIN DIAPHRAGM FOR EFFECTING MOVEMENT OF THE VALVE IN ONE DIRECTION.