Breath responsive powered air-purifying respirator
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United States of America Patent
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Dec 6, 2011
Grant Date -
Aug 21, 2008
app pub date -
Aug 14, 2007
filing date -
Aug 14, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system for regulating the airflow to a closed environment using feedback control for the position of a control valve and blower speed. The system provides a control apparatus that regulates airflow to a closed environment, such as the mask of a breathing apparatus, to ensure sufficient breathing air for a wearer of such mask. In order to provide fast response to a change in condition in the breathable environment, the airflow regulator includes a valve control and a blower control.
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