Patent ID: 7900870

Claim:
A vent door system comprising: a vent door; a cam disposed on the vent door, the cam having a groove defined thereon; a movement assembly comprising a roller and an arm, the roller being disposed within the groove, the arm being attached to the roller such that when the arm pivots, the roller rolls along the groove, thereby urging the cam and the vent door to pivot away from the vent; and a lever coupled to the movement assembly, a portion of the lever extending beyond and proximate to the perimeter of the vent door such that when the roller rolls along the grove, the lever pivots, thereby forcing the portion extending beyond the door in a direction opposite to the direction in which the vent door is opening so that the portion contacts a surface beyond the vent door to cause the lever to drive the vent door in the direction in which the vent door is opening.