Automatic irrigation system for control valve assembly

Fluid sprinkling – spraying – and diffusing – With selectively preset flow cutoff or initiating means – By rate of flow or volume means

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239 70, A01G 2700

Patent

active

041584414

ABSTRACT:
In one embodiment the main water valve to an irrigation system is connected by a fulcrum arm to a float chamber with a float therein operatively connected to the arm. When the water is "on" a controlled feed gradually fills the float chamber which shuts off the water when the float chamber is full. At this point a controlled bleed valve in the bottom of the float chamber gradually empties the float chamber and turns on the water when the float chamber is emptied thus timing the "on" cycle and the "off" cycle. By closing the controlled feed and fully opening the bleed valve, the water level in the ground can raise and lower the float so that irrigation is by soil moisture content rather than by time. In another embodiment the water in the float chamber raises and lowers air pressure in a sensing tube which acts upon a diaphragm which in turn is operatively connected to the fulcrum arm. Once again the actuation can be on a time basis or by the moisture content of the soil.

REFERENCES:
patent: 1921698 (1933-08-01), Price
patent: 2965117 (1960-12-01), Gallacher
patent: 3045699 (1962-07-01), Childers
patent: 3667502 (1972-06-01), Otto
patent: 3964685 (1976-06-01), Chauvigne

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