Irrigation system

Details Irrigation system Irrigation system

1990-04-16

1991-09-17

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With cutoff or flow varying means operated by means...

With overriding second control means

239 68, 239 69, 239 70, 239DIG15, 137 782, B05B 1204, B05B 1212

Patent

active

050487558

ABSTRACT:
An irrigation system for controlling the operation of a number of control valves each of which controls the flow of water in a corresponding branch pipe leading from a common supply pipe. The system comprises a pair of control lines which extend along the supply pipe and branch pipes to carry a control signal to operate a control unit which operates a corresponding control valve using a low voltage power supply. The control signal is coded by a data generator according to predetermined conditions and is decoded by each of the control units, the coded signal being received at each control unit, and the specified control unit operating only.

REFERENCES:
patent: 3653595 (1972-04-01), Greengard, Jr. et al.
patent: 4165532 (1979-08-01), Kendall et al.
patent: 4209131 (1980-06-01), Barash et al.
patent: 4244022 (1981-01-01), Kendall
patent: 4541563 (1985-09-01), Uetsuhara
patent: 4626984 (1986-12-01), Unruh et al.

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