Carburetor

Claim 1

IN AN AIR VALVE CARBURETOR INCLUDING: (A) A BODY (B) PRIMARY AND SECONDARY AIR AND FUEL MIXTURE CONDUITS FORMING PASSAGES IN SAID BODY WITH THE PRIMARY CONDUIT HAVING A VENTURI PASSAGE, (C) A WALL IN SAID BODY SEPARATING SAID PRIMARY AND SECONDARY PASSAGES, (D) A THROTTLE PLATE JOURNALLED IN EACH OF SAID MIXTURE CONDUITS FOR REGULATING THE PASSAGE OF FUEL MIXTURE THERETHROUGH, (E) AN AIR VALVE JORNALLED IN SAID SECONDARY MIXTURE CONDUIT UPSTREAM OF SAID THROTTLE PLATE AND INCLUDING AN AIR VALVE SHAFT, (F) A FUEL BOWL FORMED IN SAID CARBURETOR BODY AND BEING COMMUNICATED THROUGH FUEL NOZZLES TO THE RESPECTIVE PRIMARY AND SECONDARY MIXTURE CONDUITS FOR DELIVERING FUEL TO THE LATTER TO MIX WITH AIR INTRODUCED THERETO, (G) A DASH POT IN SAID FUEL BOWL INCLUDING: (1) AN ELONGATED CYLINDER, (2) A PISTON IMMERSED IN FUEL IN SAID FUEL BOWL AND SLIDABLY RECEIVED IN THE CYLINDER, SAID PISTON BEING OPERABLY CONNECTED TO SAID AIR VALVE SHAFT, (3) MEANS FORMING A PASSAGE EXTENDING LONGITUDINALLY OF SAID PISTON AND PROVIDING COMMUNICATION BETWEEN OPPOSED ENDS OF SAID CYLINDER, (4) SAID MEANS FORMING A PASSAGE INCLUDING AN ANNULAR SEAT, (5) A VALVE MEMBER RETAINED IN SAID PISTON AND BEING CO-OPERATIVE WITH SAID MEANS FORMING A PASSAGE TO REGULATE FLOW OF FUEL THROUGH THE LATTER, SAID VALVE MEMBER BEING NORMALLY IMMERSED IN FUEL CONTAINED IN SAID FUEL BOWL TO BE INFLUENCED BY FUEL TEMPERATURE, (6) SAID VALVE MEMBER INCLUDING A DEFORMABLE VALVE ELEMENT BEING MOVEABLE BETWEEN OPEN AND CLOSED POSITIONS IN RESPONSE TO A FUEL TEMPERATURE GRADIENT AND CO-OPERATIVEE WITH SAID ANNULAR SEAT IN SAID MEANS FORMING A PASSAGE WHEREBY AT LOW FUEL TEMPERATURES, THE SAID DEFORMABLE VALVE ELEMENT WILL FORM A CLOSURE ACROSS SAID MEANS FORMING A PASSAGE TO PREVENT FLOW OF FUEL THERETHROUGH AND IMPEDE MOVEMENT OF SAID PISTO AXIALLY THROUGH SAID CYLINDER THEREBY DAMPENING MOVEMENT OF THE AIR VALVE IN SAID SECONDARY MIXTURE CONDUIT IN ACCORDANCE WITH FUEL TEMPERATURE, AND AT AN INCREASED FUEL TEMPERATURE, SAID DEFORMABLE VALVE ELEMENT WILL BE DISPLACED FROM SAID ANNULAR SEAT THEREBY PERMITTING FUEL FLOW THROUGH SAID PASSAGE AND PROVIDE A LESS IMPEDED MOVEMENT OF SAID PISTON ALONG SAID CYLINDER TO EFFECT A LESSER DEGREE OF DAMPENING OF SAID AIR VALVE.