Patent ID: 6942117

Claim:
A closure door system for a filler neck of a vehicle, the system comprising a closure apparatus formed to include a pump nozzle-receiving opening, the closure apparatus being mounted on an open mouth of the filler neck, a first door coupled to the closure apparatus and movable between a first position covering the nozzle-receiving opening, a second position uncovering the nozzle-receiving opening, and a transition position lying between the first and second positions, a filler neck access door coupled to the vehicle and movable between a closed position blocking access to the filler neck and an open position allowing access to the filler neck, and a spring coupled to the closure apparatus and arranged to engage the first door, the spring being configured to bias the first door away from the access door when the first door is on a first side of the transition position and the spring being configured to bias the first door toward the access door when the first door is on a second side of the transition position.