Immersed Surface Cleaning Device Provided with a Nonreturn Inlet Conduit
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United States of America Patent
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Issued Date -
Nov 1, 2007
app pub date -
Apr 13, 2005
filing date -
Apr 14, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to am immersed surface cleaning device comprising a filtering chamber (6) provided, through a lower rigid wall (8), with at least one liquid inlet (9a, 9b) which has a non-return unit at least one filter (7) remote from each liquid inlet (9a, 9b) in such a way that a solid impurities retaining area (12) is defined and with a hydraulic circuit for forming a liquid flow by pumping means (4). At least one non-return unit comprises an anti-return conduit (20) which extends through the retaining area (12) away from the liquid inlet and whose free end (21) enters said retaining area (12), wherein the conduit is used for preventing at least the passage of impurities in an opposite direction from the retaining area through the liquid inlet at least when said pumping means is unused.
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