Fluid handling – Liquid level responsive or maintaining systems – Barometric
Patent
1986-05-14
1987-03-31
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
Barometric
137 782, 137454, 47 79, 222 56, 222 64, 239 63, 239193, F16K 3112
Patent
active
046535292
ABSTRACT:
An intermittently operating watering device has a water reservoir for supplying successive flows of water to a pair of receptacles which are separated from one another by a weir. The water also flows into an air space where it covers the lower end of an air passage communicating with an air space at the top of the interior of the water reservoir so that, each time evaporation of the water uncovers the lower end of the air passage to allow the inflow of air, water is able to flow out from the water reservoir to the receptacles. The reservoir is in one of the receptacles and a plant in the other receptacle is irrigated at successive intervals of time.
REFERENCES:
patent: 267296 (1882-11-01), Wilder
patent: 2818877 (1958-01-01), Swanson
patent: 3125255 (1964-03-01), Kaiser
patent: 3438575 (1969-04-01), Rohling
patent: 4057933 (1977-11-01), Enyeart
patent: 4085546 (1978-04-01), Hallar
patent: 4121608 (1978-10-01), MacLeod
patent: 4241538 (1980-12-01), Lahr
patent: 4447983 (1984-05-01), Shinada
patent: 4542762 (1985-09-01), Littlehale
patent: 4578897 (1986-04-01), Pazar et al.
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