Watering valve device

Details Watering valve device Watering valve device

1978-08-22

1981-03-17

Michalsky, Gerald A.

Fluid handling

Ambient condition change responsive

For controlling soil irrigation

13762411, 239 64, 251137, A01G 2516

Patent

active

042561337

ABSTRACT:
A watering valve device includes a first electromagnetic coil for opening a valve to enable a sprinkling system and a second electromagnetic coil for closing the valve. An electronic circuit is provided for supplying current pulses for selectively energizing the two coils to control sprinkling in response to ground moisture and/or sunlight. The circuit includes a first timer for maintaining the sprinkling valve on for a predetermined timer period after sunlight occurs to assure penetration of the ground by moisture during night-time watering. The circuit includes a second timer for maintaining the valve on for a second predetermined time period following moisture detection by a ground probe to assure ground penetration by moisture during a moisture responsive, closed loop mode of control. The circuit and valve are operated by batteries that are charged by sunlight.

REFERENCES:
patent: 3224676 (1965-12-01), Rauchwerger
patent: 3361356 (1968-01-01), Johnson et al.
patent: 3383084 (1968-05-01), Mayfield
patent: 3777976 (1973-12-01), Milodvancevic
patent: 3991939 (1976-11-01), Maclay
patent: 4180087 (1979-12-01), Meisner et al.
patent: 4197866 (1980-04-01), Neal

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