Patent ID: 7356856
Filing Date: 2008-04-15
Classification: E03D,Y02A,Y10T

Abstract:
1. A toilet overflow prevention system, comprising: an overflow valve configured to move between an open position in which water flow is permitted between a tank of the toilet and a bowl of the toilet through said overflow valve and a closed position in which said overflow valve substantially prevents water flow from the tank to the bowl, said overflow valve movable between said open position and said closed position in response to a control signal; a control valve configured to selectively send a control signal to said overflow valve; a water level sensor comprising a base and a movable portion that is movable relative to said base, said water level sensor defining a portion of a fluid passage that communicates with said control valve, wherein said movable portion moves relative to said base in response to an above-normal water level in the bowl to a position such that said movable portion cooperates with said base to substantially block flow through said fluid passage and thereby cause said control valve to send a control signal to said overflow valve, wherein said movable portion comprises a lip configured to interfere with water flow from the tank to the bowl, wherein said water flow applies a force to said lip tending to move said movable portion away from said base.