Charge forming apparatus

Claim 1

CHARGE FORMING APPARATUS INCLUDING, IN COMBINATION, A BODY FORMED WITH A FUEL AND AIR MIXING PASSAGE HAVING A MAIN VENTURI AND A SUPPLEMENTAL VENTURI, SAID BODY HAVING A RECESS, A THROTTLE VALVE IN THE MIXING PASSAGE, A DIAPHRAGM FORMING WITH SAID RECESS AN UNVENTED FUEL CHAMBER, THE AXIS OF THE SUPPLEMENTAL VENTURI BEING BETWEEN THE DIAPHRAGM AND THE AXIS OF THE MAIN VENTURI, ORIFICE MEANS OPENING INTO THE SUPPLEMENTAL VENTURI FOR DELIVERING LIQUID FUEL FROM THE FUEL CHAMBER INTO THE SUPPLEMENTAL VENTURI UNDER THE INFLUENCE OF ASPIRATION IN THE MIXING PASSAGE, MEANS CONTROLLED BY SAID DIAPHRAGM FOR REGULATING FUEL FLOW FROM A SUPPLY INTO FUEL CHAMBER, AN EXTERIOR UPSTANDING CLOSED CYLINDER PROJECTING OUTWARDLY FROM THE CARBURETOR BODY AND DEFINING A SUPPLEMENTAL FUEL WELL, PASSAGE MEANS FOR CONVEYING SUPPLEMENTAL FUEL FROM THE FUEL CHAMBER TO THE FUEL WELL, FLAP VALVE MEANS INTEGRAL WITH SAID DIAPHRAGM FOR PERMITTING UNIDIRECTIONAL FUEL FLOW FROM SAID FUEL CHAMBER TO SAID FUEL WELL, AS ORIFICE OPENING INTO THE MIXING PASSAGE AT THE INLET END OF THE SUPPLEMENTAL VENTURI, A SUPPLEMENTAL FUEL PASSAGEWAY TO CONVEY FUEL FROM THE WELL TO THE ORIFICE, A RELATIVELY MOVABLE PISTON MEMBER ASSOCIATED WITH THE WELL, AND LINKAGE MEANS ESTABLISHING OPERATIVE CONNECTION OF THE RELATIVELY MOVABLE MEMBER WITH THE THROTTLE VALVE AND INCLUDING CAM MEANS WHEREBY CLOSING MOVEMENTS OF THE THROTTLE VALVE ESTABLISH FUEL FLOW FROM THE FUEL CHAMBER INTO THE WELL AND WHEREBY OPENING MOVEMENTS OF THE THROTTLE VALVE ESTABLISH FUEL FLOW FROM THE WELL TO SAID ORIFICE FOR ENGINE ACCELERATING PURPOSES.