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A filler neck closure assembly for a vehicle fuel tank filler neck, comprising: a housing configured to be mounted in the filler neck and formed to include a sealing surface and a pressure-relief valve positioned to lie in the housing and provided with a nozzle-receiving portion and a sealing portio

A filler neck closure assembly for a vehicle fuel tank filler neck, comprising: a housing configured to be mounted in the filler neck and formed to include a sealing surface and a pressure-relief valve positioned to lie in the housing and provided with a nozzle-receiving portion and a sealing portion, wherein the nozzle-receiving portion is formed to include a nozzle-receiving opening sized to receive a pump nozzle during refueling of the fuel tank and the sealing portion is movable with the nozzle portion and relative to the housing between a closure-sealing position sealingly engaging the sealing surface and a pressure-relief position away from the sealing surface to define an opening to vent fuel vapor from the fuel tank when tank pressure exceeds a predetermined maximum pressure. The housing is formed to include a passageway containing the pressure-relief valve therein and defines an annular space around the pressure-relief valve, between the pressure-relief valve and the housing, and with a coiled compression spring positioned in the annular space, the pressure-relief valve including an axially outwardly extending annular guide wall adjacent to the annular space which defines a radially inner side of the annular space, the housing further including a radially inwardly extending annular lip wherein the guide wall slidingly engages the lip of the housing to radially guide the pressure-relief valve during movement of the pressure-relief valve between the closure-sealing position and the pressure-relief position.

대표청구항 ▼

1. A filler neck closure assembly for a vehicle fuel tank filler neck, the assembly comprisinga closure for closing the filler neck, the closure including a housing formed to include an interior region for receiving fuel vapor in the filler neck and a vent aperture for discharging fuel vapor from th

1. A filler neck closure assembly for a vehicle fuel tank filler neck, the assembly comprisinga closure for closing the filler neck, the closure including a housing formed to include an interior region for receiving fuel vapor in the filler neck and a vent aperture for discharging fuel vapor from the interior region, closure retainer apparatus appended to the housing and configured to engage the filler neck when the housing is installed in the filler neck to block removal of the closure from the filler neck, a seal member engaging the housing and lying in a position to engage the filler neck to establish a sealed connection between the housing and the filler neck when the housing is installed in the filler neck, and a movable tank pressure control assembly mounted for movement in the interior region of the housing between a filler neck-closing position blocking discharge of fuel vapor in the filler neck through the vent aperture and a filler neck-venting position allowing discharge of fuel vapor in the filler neck through the vent aperture, the movable tank pressure control assembly including a nozzle-receiving opening and a door mechanism normally closing the nozzle-receiving opening.