Fuel pumping and charge forming apparatus

Claim 1

A COMBINATION CARBURETOR AND FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE SERVING AS A SOURCE OF FLUID PULSATIONS SUCH AS OCCUR IN THE ENGINE CRANKCASE AND ENGINE INTAKE PASSAGEWAY WHILE THE ENGINE IS RUNNING, SAID CARBURETOR COMPRISING A CASING HAVING A MOUNTING FACE FOR MOUNTING THE CARBURETOR IN FUEL-AIR MIXTURE SUPPLYING RELATION WITH THE ENGINE, SAID CASING ALSO HAVING A FUEL-AIR MIXTURE PASSAGEWAY THERETHROUGH TERMINATING AT AN OUTLET OPENING IN SAID MOUNTING FACE AND A CAVITY EXTENDING INWARDLY FROM A SECOND OPENING IN SAID MOUNTING FACE SAID OUTLET OPENING OF SAID MIXTURE PASSAGEWAY AND SAID SECOND OPENING OF SAID MIXTURE PASSAGEWAY AT SAID MOUNTING FACE, SAID CAVITY BEING CLOSELY ADJACENT AND GENERALLY PARALLEL TO SAID MIXTURE PASSAGEWAY, INLET AND OUTLET PORTS IN SAID CASING FOR CONNECTING SAID CAVITY WITH A SOURCE OF FUEL AND FOR SUPPLYING FUEL TO THE FUEL MIXTURE PASSAGEWAY, A FLEXIBLE DIAPHRAGM IN THE FORM OF A CLOSED END TUBE POSITIONED IN SAID CAVITY WITH THE FORM OF END REMOTE FROM SAID SECOND OPENING AND THE OPEN END ADJACENT SAID SECOND OPENING WHEREBY WHEN THE CARBURETOR IS MOUNTED IN FUEL MIXTURE SUPPLYING RELATION WITH SAID ENGINE FLUID PULSATIONS FROM SAID ENGINE ARE COMMUNICATED TO THE DIAPHRAGM THROUGH THE OPEN END THEREOF TO CAUSE SAID DIAPHRAGM TO PULSATE AND PUMP FUEL FROM THE SOURCE OF FUEL AND SUPPLY THE SAME TO THE FUEL MIXTURE PASSAGEWAY.