Tank venting control assembly

An apparatus for controlling flow of fuel vapor and liquid fuel through an aperture in a fuel tank, the apparatus comprising

• a housing mounted in the aperture and formed to include an outlet,
• a float valve positioned in the fuel tank and formed to include a float chamber therein, the float valve being movable in the housing 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,
• a ball positioned in the float chamber for movement in response to movement of the fuel tank,
• a base movable relative to the housing and formed to include a ball-supporting seat.

An apparatus for controlling flow of fuel vapor and liquid fuel through an aperture in a fuel tank, the apparatus comprising

• a housing mounted in the aperture and formed to include a discharge orifice and a flow passageway separate from the discharge orifice,
• venting means for selectively blocking flow of fuel vapor and liquid fuel through the discharge orifice, the venting means being arranged to receive flow of fuel vapor from the flow passageway, to move from a flow-blocking position to a flow-delivery position, and
• closure means for minimizing carryover of liquid fuel past the venting means through the discharge orifice under conditions of sloshing or tank agitation, the closure means including float means for blocking flow of fuel vapor through the flow passageway, the float means being formed to include a float chamber and being movable between a closed position blocking flow of fuel vapor through the flow passageway to prevent the venting means from exposure to fuel vapor and an open position allowing flow of fuel vapor through the flow passageway to allow the venting means to be exposed to fuel vapor, the closure means further including a ball positioned in the float chamber and means for supporting the ball in the float chamber, the support means being movable relative to the housing in response to sloshing and tank agitation to move the ball so that the float valve is urged to its closed position, thereby preventing the venting means from exposure to fuel vapor so that the venting means assumes its flow-blocking position preventing carryover of liquid fuel through the discharge orifice.