Plant husbandry – Water culture – apparatus or method – Nutrient recirculation system
Patent
1989-04-26
1990-08-28
Scherbel, David A.
Plant husbandry
Water culture, apparatus or method
Nutrient recirculation system
47 39, 47 79, 47 82, A01G 924, A01G 3102
Patent
active
049514164
ABSTRACT:
A hydroponic system is disclosed that consists of a novel nutrient supply system. An air pump is connected into an air line that extends into a nutrient solution container. A nutrient solution supply line extends from the nutrient solution container, and a nutrient solution return line extends back into the nutrient solution container. The return line will be connected to the lowermost vertical extent of the plant containers and will return any excess nutrient fluid back into the nutrient supply system. A flap valve is disposed on the return line within the fluid container and will increase the efficiency of the pumping of the nutrient fluid. The nutrient solution return line, the nutrient solution supply line and the high-pressure air line are all connected into a T-connector. A small opening is formed in the T-connector adjacent the connection of the return line and the T-connector. The flow of high-pressure air into the T-shaped connector will cause a jet or venturi effect that will draw fluid into the small opening and in addition will entrain some returning fluid upwardly into the nutrient solution supply line and therethrough to the plant containers of the system. Two embodiments of plant containers are disclosed.
REFERENCES:
patent: 2131743 (1934-12-01), Loughridge
patent: 2486512 (1949-11-01), Armstrong
patent: 4302906 (1981-12-01), Kawabe et al.
patent: 4676023 (1987-06-01), Mori
Automatic Sub-Irrigations Sand Culture Technique for Comparative Studies in Plant Nutrition, Andrew, vol. 23, No. 1, (Jan., 1974), Laboratory Practices Science.
Automatic Irrigation of Sand Cultures mechanism, Lott, Jul. 1, 1938, pp. 17, 18.
Gossett Dykema
Scherbel David A.
Van Patten Michele A.
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