Opposed blade balanced damper
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United States of America Patent
Stats
-
Apr 4, 1989
Grant Date -
N/A
app pub date -
Nov 5, 1987
filing date -
Nov 5, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An opposed blade balanced damper includes three sector-shaped damper blades individually mounted to a frame for pivotal movement around a pair of pivot tabs integrally formed on each damper blade. A user-actuable control assembly simultaneously controls the relative rotational position of each damper blade so as to selectively regulate airflow through a duct. The damper blades and control assembly function to direct airflow toward the center of the duct and thereby maintain symmetrical airflow through the duct. This is achieved by rotating the damper blades so that the inner ends of the damper blades move downstream, and the outer ends of the damper blades move upstream, as the damper blades are rotated from a closed to an open position.
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