Automatic water control apparatus

Details Automatic water control apparatus Automatic water control apparatus

1990-03-27

1991-01-29

Chambers, A. Michael

Fluid handling

Ambient condition change responsive

For controlling soil irrigation

137907, 239 63, A01G 2500

Patent

active

049879154

ABSTRACT:
A water control apparatus is disclosed which is automatically turned on and off responsive to the moisture content of a moisture sensing element which is placed in the locale where it is desired to control the flow of water, such as in the ground or above a pool or as a humidifer. The device does not require any electical power supply, and uses a venturi device and a ceramic moisture sensing element that is porous to air when dry and impervious to air when wet to control a pressure sensitive valve.

REFERENCES:
patent: 1963735 (1934-06-01), Crosthwait, Jr.
patent: 2017311 (1935-10-01), Jacobsen
patent: 2093842 (1937-09-01), MacLean et al.
patent: 2777432 (1957-01-01), Ensign
patent: 2829664 (1958-04-01), Mountford
patent: 2893698 (1958-12-01), Richards
patent: 3981446 (1976-09-01), Hunter
patent: 4055200 (1977-10-01), Lohoft

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