Patent ID: 7055211

Claim:
A blocker door assembly, comprising: a carpet engaging nozzle base; a nozzle opening positioned in the base; a rotating agitator positioned in the nozzle opening; an outlet duct in fluid communication with the nozzle opening; a motor/fan assembly in fluid communication with the duct; a blocker door adapted to slide between a open position which places the nozzle opening in fluid communication with the motor fan unit and a closed position which blocks fluid communication between the nozzle opening and the motor fan unit; a spring which biases the blocker door into the closed position, an arcuate track defined in the base; an arcuate blocker door surface adapted to engage the arcuate track; a tab extending beneath the arcuate blocker door surface; and a slot defined in the arcuate track, wherein: the blocker door follows an arcuate path as the blocker door is moved between the open position and the closed position, the tab is positioned within the slot to align the blocker door relative to the base; and the tab slides within the slot as the blocker door moves between the open position and the closed position.