Process and device for preventing evaporation loss

Claim 1

IN A SYSTEM FOR CONTAINING AND SUBSEQUENTLY CONSUMING THE VAPORS NORMALLY ESCAPING TO THE ATMOSPHERE FROM THE FUEL SUPPLY FOR AN INTERNAL COMBUSTION ENGINE HAVING AN INTAKE MANIFOLD FOR DISTRIBUTING A MIXTURE OF FUEL AND AIR TO INDIVIDUAL CYLINDERS OF SAID ENGINE, A CARBURETOR HAVING AIR AND FUEL INLETS FOR SUPPLYING A MIXTURE OF AIR AND FUEL TO AN INLET ON SAID INTAKE MANIFOLD, A FUEL BOWL ASSOCIATED WITH THE CARBURETOR FOR SUPPLYING FUEL TO SID FUEL INLETS, AN AIR HORN ON THE CARBURETOR FOR MOUNTING AN AIR FILTER AT THE AIR INLET TO SAID CARBURETOR, AND MEANS INCLUDING A FUEL TANK FOR MAINTAINING A SUBSTANTIALLY CONSTANT FUEL LEVEL IN SAID FUEL BOWL: THE IMPROVEMENT IN SAID SYSTEM WHICH COMPRISES A PAIR OF ABSORBENT BEDS ENCLOSED IN SEPARATE CLOSED CONTAINERS, A FIRST CONDUIT CONNECTING AT ITS OPPOSITE ENDS WITH SAID FUEL TANK ABOVE THE USUAL FUEL LEVEL THEREIN AND ONE SIDE OF ONE OF SAID CONTAINERS, AN ATMOSPHERIC VENT AT AN OPPOSITE SIDE OF SAID ONE OF SAID CONTAINERS, A SECOND CONDUIT, CONNECTING AT ITS OPPOSITE ENDS WITH SAID FIRST CONDUIT, INTERMEDIATE ITS ENDS, AND ONE SIDE OF THE OTHER OF SAID CONTAINERS, MEANS CONNECTED AT AN OPPOSITE SIDE OF SAID OTHER CONTAINER FOR SELECTIVELY OPENING OR CLOSING A VENT FROM SAID OTHER CONTAINER TO ATMOSPHERE, THIRD AND FOURTH CONDUITS SEPARATELY CONNECTED AT THEIR OPPOSITE ENDS WITH SAID INTAKE MANIFOLD, AND THE TOP OF SAID SECOND CONDUIT BETWEEN AT SPACED APART LOCATIONS ON SAID SECOND CONDUIT BETWEEN OPPOSITE ENDS THEREOF, VALVE MEANS IN SAID SECOND CONDUIT FOR ALTERNATIVELY OR SIMULTANEOUSLY OPENING AND CLOSING COMMUNICATION OF SUCTION IN SAID INTAKE MANIFOLD BY WAY OF SAID THIRD CONDUIT WITH SAID ONE CONTAINER AND SAID TANK OR WITH SAID OTHER CONTAINER AND SAID FUEL BOWL, AND A FIFTH CONDUIT CONNECTED AT ITS OPPOSITE ENDS WITH THE AIR HORN OF SAID CARBURETOR AND SAID OTHER CONTAINER BETWEEN SAID SELECTIVE VENTING MEANS AND SAID OTHER CONTAINER.