Plant husbandry – Water culture – apparatus or method – Nutrient recirculation system
Patent
1975-12-29
1977-07-05
Eickholt, E. H.
Plant husbandry
Water culture, apparatus or method
Nutrient recirculation system
47 83, A01G 3100
Patent
active
040330729
ABSTRACT:
An apparatus for hydroponic cultivation comprising a collector tank for a culture liquid and an upright cultivating tube erected on the collector tank. A plurality of plant holder units are mounted on the cultivating tube and are adapted for receiving cultivating liquid therefrom. A cistern is mounted on the cultivating tube at the top thereof and it contains a siphon generating mechanism. An air mixer in the collector tank is connected to an air pump and serves to mix air with culture liquid to feed the same via a supply pipe to the cistern.
REFERENCES:
patent: 1031771 (1912-07-01), Buttschau
patent: 2118532 (1938-05-01), Widmann
patent: 2131743 (1938-10-01), Loughridge
patent: 2152869 (1939-04-01), Campbell
patent: 2436652 (1948-02-01), Lee
patent: 3053011 (1962-09-01), Silverman
patent: 3452475 (1969-07-01), Johnson, Sr.
patent: 3772827 (1973-11-01), Ware
patent: 3841023 (1974-10-01), Carlyon, Jr.
patent: 3943658 (1976-03-01), Hal
Kobayashi Hitoshi
Tatemoto Jirou
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