Power fuel supply system for an internal combustion engine carburetor

Claim 1

A POWER FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE CARBUETOR HAVING AT LEAST TWO BARRELS AND THROTTLE VALVES PIVOTALLY MOUNTED WITHIN SAID BARRELS, SAID CARBURETOR INCLUDING A FUEL BOWL, A POWER VALVE RECEIVING FUEL FROM SAID FUEL BOWL, AND FIRST AND SECOND FUEL PASSAGES RECEVING FUEL FROM SAID POWER VAVE AND DISCHARGING IT INTO FIRST AND SECOND OF SAID BARRELS, RESPECTIVELY, SAID POWER VALVE INCLUDING A HOUSING HAVING A VACUUM MOTOR AT ONE END THEREOF, SAID VACUUM MOTOR HAVING A VARIABLE VOLUME CHAMBER IN COMMUNICATION WITH A SOURCE OF ENGINE INTAKE MANIFOLD VACUUM, SAID VACUUM MOTOR INCLUDING A MOVABLE ELEMENT DISPLACEABLE IN RESPONSE TO INTAKE MANIFOLD VACUUM PRESSURE, SAID POWER VALVE INCLUDING A BORE AND A PISTON MEANS SLIDINGLY RECEIVED WITHIN SAID BORE IN ENGAGEMENT WITH SAID MOVABLE ELEMENT, SAID PISTON MEANS HAVING AN INLET AND AN OUTLET OPENABLE TO SAID FIRST AND SECOND FUEL PASSAGES, SAID PISTON MEANS BEING RESILIENTLY HELD IN A FIRST POSTION IN WHICH IT BLOCKS THE OUTLET FROM THE FIRST AND SECOND FUEL PASSAGE, AND THE FIRST FUEL PASSAGE FROM THE SECOND FUEL PASSAGE, SAID PISTON MEANS BEING MOVABLE BY THE VACUUM MOTOR TO A SECOND POSITION IN WHICH THE OUTLET IS IN COMMUNICATION WITH THE FIRST AND SECOND FUEL PASSAGES, A FLOW RESTRICTOR RESILIENTLY MOUNTED WITHIN AN OPENING IN SAID HOUSING AND HAVING AN ORIFICE TO PERMIT FUEL FLOW FROM SAID FUEL BOWL TO SAID PISTON MEANS INLET, A THROTTLE LEVER PIVOTALLY MOVABLE WITH SAID THROTTLE VALVES, AND MOTION TRANSFER MEANS INTERCONNECTING SAID RESTRICTOR AND THE THROTTLE LEVER TO DISPLACE SAID RESTRICTOR WHEN THE THROTTLE LEVER REACHES A PREDETERMINED POSITION, SAID RESTRICTOR WHEN DISPLACED PERMITTING INCREASED FUEL FLOW INTO SAID HOUSING THROUGH SAID OPENING.