IMPROVED AIRFLOW REGULATOR

摘要

The invention provides an airflow regulator for a mine passage comprising: a louvre blade pivotable to a predetermined position which is in a range from a closed position in which the louvre blade restricts at least a portion of the passage to an open position in which air is readily able to flow in the passage; and a linkage mechanism for pivoting the louvre blade wherein the linkage mechanism includes a biasing strut mechanism which only activates to pivot the louvre blade into the open position when a predetermined airflow is reached and biases the louvre blade to its predetermined position after the airflow has reduced to less than the predetermined airflow.