DAMPER SYSTEM FOR AUTOMOTIVE VENTILATION

摘要

A novel damper system for controlling airflow through a plenum provides an effective seal between a rotatable damper door and the plenum to substantial ly inhibit airflow through the plenum without requiring additional sealing materials such as rubber or foam. When the damper door is in the closed position, an upstanding rib on each of the upper and lower portions of the damper door engage a complementary groove in a respective sealing member on the interior of the plenum against which the damper door faces abu t. The engagement of the ribs in the groove provides a seal comprising three surfac e- to-surface interfaces. The sealing members are relatively small, compared to the size o f the plenum, and thus present little impediment to airflow through the plenum when the damper door is rotated to an open position.