Plant husbandry – Water culture – apparatus or method – Nutrient recirculation system
Patent
1993-03-19
1995-01-31
Raduazo, Henry E.
Plant husbandry
Water culture, apparatus or method
Nutrient recirculation system
47 79, A01G 2500
Patent
active
053855906
ABSTRACT:
An inexpensive, self-contained, hydroponic planter for various house plants automatically supplies to the plants the correct amount of water, nutrients and adequate root exposure to gases in the air. The planter includes a tank storing the mixture of water and nutrients, a drain for changing the solution and a sight glass for gauging the proper water level range. An air pump with an air line leading from above the water level to the bottom of the storage tank is attached to the intake of a riser tube. The riser tube goes from the bottom of the storage tank through a stand pipe in a pot above the storage tank to the top of the pot. Compressed air intermittently fed into the bottom of the riser tube rises inside the tube, expanding and increasing in velocity as ambient pressure decreases and creating an "air lift" that draws the water into the bottom of the tube and lifts it, along with the expanding air, to the top of the tube where it is discharged into the pot. The water and nutrient solution trickles down through an inert growing medium such as sand, gravel, perlite, vermiculite, or the like and drains from the bottom of the pot back into the storage tank. The inert growing medium absorbs some of the water and nutrient solution, thereby keeping adequate moisture and food for the plant roots while leaving adequate air space so the plant roots can breathe.
REFERENCES:
patent: 2306027 (1942-12-01), Swaney
patent: 3243919 (1966-04-01), Carlson
patent: 4149340 (1979-04-01), Lobo
patent: 4419842 (1983-12-01), Paloian
patent: 4676023 (1987-06-01), Mori
patent: 5127366 (1992-07-01), Kim
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