Patent ID: 7089954

Claim:
A vent apparatus for controlling discharge of fuel vapor from within a fuel tank, the apparatus comprising a valve container adapted to be mounted in a top wall of the fuel tank, the valve container being formed to include a first inner slot adapted for communicating with an interior region of the fuel tank, a vapor outlet opening, and a valve chamber interconnecting the first inner slot and the vapor outlet opening, a fill-limit valve disposed in the valve chamber and mounted for movement between an opened position allowing flow of fuel vapor through the vapor outlet opening and a closed position preventing flow of fuel vapor through the vapor outlet opening, and a fill-limit adjustor sleeve formed to include a first outer slot and mounted for rotation about the valve container between a first position wherein the first inner and outer slots intersect to define a lowest fuel entry port located in a lowest position to communicate rising liquid fuel extant in the fuel tank into the valve chamber through the lowest fuel entry port to the fill-limit valve so as to establish a lowest fill-limit level of liquid fuel in the fuel tank and a second position wherein the first inner and outer slots intersect to define a highest fuel entry port located in a highest position above the lowest fuel entry port and below the vapor outlet opening to communicate rising liquid fuel extant in the fuel tank into the valve chamber through the highest fuel entry port to the fill-limit valve so as to establish a highest fill-limit level of liquid fuel in the fuel tank.