Timer activated irrigation system control

Details Timer activated irrigation system control Timer activated irrigation system control

1993-07-13

1995-03-28

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

For controlling soil irrigation

13762412, A01G 2516

Patent

active

054008158

ABSTRACT:
A control apparatus controls a timer activated irrigation system. A catch pan has a vertically extending wall and a floor. The wall defines a top thereof. The wall and floor define a basin. The catch pan has an overflow construction into which water from the basin can flow. The catch pan is pivotally mounted about a substantially horizontal axis. A biasing structure is adapted to bias a portion of the catch pan spaced from the pivot upwardly. When water in the basin is below a selected depth the upwardly biased portion of the catch pan rotates upwardly into a first orientation. When water in the basin is at least the selected depth the upwardly biased portion of the catch pan rotates downwardly into a second orientation. Water collecting structures collect irrigation water and rain water and deliver them to the basin. A cover structure prevents rain from flowing into the basin other than via the rain collecting structure. A control structure controls the irrigation system so as to replace local cumulative ET by adjustment of frequency of irrigation, lengths of irrigation cycles and/or flow rate of irrigation water during irrigation cycles.

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patent: 4770345 (1988-09-01), Ross, Jr. et al.
patent: 4883200 (1989-11-01), Miller
patent: 4919165 (1990-04-01), Lloyd

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