초록 ▼

An apparatus is provided for controlling flow of fuel vapor and liquid fuel through an aperture in a fuel tank. The apparatus includes a housing mounted in the aperture and a vent valve movable in the housing to block flow of fuel vapor between the fuel tank and an outlet. The housing is further for

An apparatus is provided for controlling flow of fuel vapor and liquid fuel through an aperture in a fuel tank. The apparatus includes a housing mounted in the aperture and a vent valve movable in the housing to block flow of fuel vapor between the fuel tank and an outlet. The housing is further formed to include a float valve movable between a closed position blocking flow of fuel vapor and liquid fuel through the outlet and an open position allowing flow of fuel vapor through the outlet. The float valve includes a wide-diameter base, an upwardly extending closure appended to the base member, and a downwardly extending narrow-diameter weighted unit depending from the base. The base and the weighted unit are sized, shaped, weighted, and located to cause the float valve to “snap”(e.g. move quickly and suddenly) to its closed position after rising fuel in the fuel tank rises past the weighted unit and engages the underside of the base.

대표청구항 ▼

An apparatus for controlling venting of fuel vapor through a vent aperture in a fuel tank, the apparatus comprising a float valve having a vertical axis extending therethrough and including a base having an upper end and a lower end, an upwardly-extending closure member appended to the upper end of

An apparatus for controlling venting of fuel vapor through a vent aperture in a fuel tank, the apparatus comprising a float valve having a vertical axis extending therethrough and including a base having an upper end and a lower end, an upwardly-extending closure member appended to the upper end of the base and formed to include a vent aperture closure cap, and a downwardly-extending, elongated, weighted unit depending from the lower end of the base, the lower end of the base having a first downwardly-presented surface of a predetermined cross-sectional area positioned on the float valve to lie at a position coinciding with the fluid level in the fuel tank when the vent aperture closure cap moves to a position closing the vent aperture in the fuel tank, the weighted unit having a second downwardly-presented surface positioned to lie in axially spaced-apart relation to the first downwardly-presented surface, the second downwardly presented surface having a cross-sectional area that is less than the predetermined cross-sectional area of the first downwardly-presented surface.