Load sensor safety vacuum release system
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United States of America Patent
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Oct 9, 2012
Grant Date -
May 4, 2006
app pub date -
Nov 1, 2005
filing date -
Nov 1, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A motor with associated load sensor is connected to a circulation pump of a swimming pool circulation system. The load sensor performs the function of a safety vacuum release system by detecting underload of the motor. Underload is now discovered to be reliably indicative of blockage on the intake side of a circulation pump. A switch controlled by the load sensor shuts off the motor in response to a suitable underload. Vacuum on the intake side of the circulation pump neutralizes, thereby freeing a person or object blocking the suction line.
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