Fluid handling – Ambient condition change responsive – For controlling soil irrigation
Patent
1992-03-03
1993-12-14
Chambers, A. Michael
Fluid handling
Ambient condition change responsive
For controlling soil irrigation
137895, 137907, 251 65, 239 63, F16K 1736
Patent
active
052693376
ABSTRACT:
A water control apparatus having a main valve, a main valve control, and a step-wise valve. A moisture sensor is connected to the valve control. In response to the moisture sensor, the valve control opens or closes the main valve. When the main valve opens, sufficient water pressure must be present for the step-wise valve to open. When said step-wise valve opens, water flows through it and to a water distribution device that makes the moisture sensor moist. When the moisture sensor is sufficiently moist, the valve control turns the main valve off. With the main valve off, the lack of water pressure closes the step-wise valve. The step-wise valve opens at a higher water pressure threshold and closes at a lower water pressure threshold. The decrease in pressure arising from the opening of the step-wise valve is insufficient to close it. The water control apparatus is powered by water flow and is otherwise self-sufficient.
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Anten Lewis
Chambers A. Michael
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