Demand responsive central vacuum system
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United States of America Patent
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-
Jul 20, 1999
Grant Date -
N/A
app pub date -
Jun 13, 1997
filing date -
Jun 13, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A demand responsive central vacuum system having a vacuum producer driven by a variable speed motor and connected to a piping system having inlet ports located in areas to be cleaned. Wet and dry separators are connected in tandem in the piping system between the inlet ports and the vacuum producer. A flow switch detects when a flow condition is present in the piping system indicating that the vacuum system is in use and provides a signal to a controller which increases the operational speed of the drive motor and opens a bleed valve connected to the piping system to bleed air into the piping system.
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