Airflow regulator
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United States of America Patent
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Issued Date -
Oct 21, 2010
app pub date -
Apr 2, 2010
filing date -
Oct 3, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides an airflow regulator for a mine passage, comprising: a louver blade pivotable to a predetermined position, which is in a range from a closed position in which the louver 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 louver blade wherein the linkage mechanism includes a biasing strut mechanism which is only activated to pivot the louver blade into the open position when a predetermined airflow is reached and biases the louver blade to its predetermined position after the airflow has reduced to less than the predetermined airflow.
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