Fume hood air flow control
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United States of America Patent
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-
May 3, 1988
Grant Date -
N/A
app pub date -
Jan 9, 1985
filing date -
Jan 9, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system is provided for providing a constant flow of air through a chamber, such as a fume hood, by measuring the pressure of the air outside of the hood and comparing it with the pressure of the air within the hood and adjusting the flow of air to achieve a constant pressure difference. The system is particularly applicable to fume hoods which have a sash which can be opened or closed or left in intermediate position; the present system will provide a constant air flow through the hood regardless of the sash position.
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