Air vent closure system
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United States of America Patent
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-
Jan 21, 1992
Grant Date -
N/A
app pub date -
May 18, 1990
filing date -
May 18, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An automatic ventilator closure is described which operates on the basis of an over-pressure within the conduit leading up to the ventilator outlet. Electrical interlocks control a motor to place the closure in an open or closed condition.
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