US Pat. No. 9,909,295

IN-TOILET LEAK DETECTOR

Leak Beeper, LLC, Frankl...

11. The leak detector of claim 1, wherein the second metal contact comprises a metal ring positioned around the exterior surface of the flow tube.

US Pat. No. 10,214,889

IN-TOILET LEAK DETECTOR

Leak Beeper, LLC, Frankl...

1. A toilet leak detector for a toilet having a toilet tank, comprising:an inlet adapted to connect to a toilet fill tube;
a nonconductive flow tube, the flow tube
being connected to the inlet to receive water from the inlet,
having an opening at one end that allows the water from the inlet to flow through the flow tube and out of the opening, and
being operationally arranged relative to the inlet within the toilet such that water flowing out of the opening is directed into an overflow tube of the toilet so as to fill a toilet bowl;
a first conductive contact along an interior surface of the flow tube and a second conductive contact along an exterior surface of the flow tube, the first and second conductive contacts being electrically isolated from one another by the flow tube, such that the first and second conductive contacts serve as a capacitor for which capacitance is measured in a capacitive sensor;
a water-tight housing connected to the flow tube and the inlet, the housing being sized and configured to remain within the toilet tank;
a depending clip connected to the underside of the housing and positioned to retain and support the leak detector on the overflow tube of the toilet, the clip being arranged relative to the flow tube such that when the leak detector is positioned on the overflow tube of the toilet, the flow tube extends into the overflow tube; and
a controller coupled to the sensor and disposed within the housing, the controller being adapted to determine long flow and short flow conditions based on measuring flow duration using the capacitive sensor.