Liquid fertilizer metering system

Fluid handling – Systems – Main line as motive fluid for follower-type feeder

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E03B 707

Patent

active

049746340

ABSTRACT:
A liquid content (fertilizer) metering apparatus comprising a sealed container having a pocket for supporting a pliable bag of liquid fertilizer which is metered into a restricted throat of a Venturi tube. Water from a relatively high-pressure line seeks a passageway into the container's pocket to pressurize the bag. With a lower pressure at the restricted throat, the liquid contents flow through a metered orifice or passageway to the throat, thus providing a predetermined mixture of water and contents that subsequently flows in a water flow conduit. Alternative embodiments include lid and bag assemblies as well as cartridge assemblies for the filled pliable bag, which facilitate handling, deposit and removal of the bags vis-a-vis the apparatus. One embodiment includes a valve having different sized metering orifices for the liquid contents. Another embodiment comprises a solid body which includes the Venturi tube and a pocket for deposit of a cartridge assembly the filled pliable bag, and to which water pressure is applied to discharge its contents. Other embodiments also are disclosed.

REFERENCES:
patent: 2153240 (1939-04-01), Dailey et al.
patent: 3198438 (1965-08-01), Holtgren
patent: 3204661 (1965-09-01), Young
patent: 3220435 (1965-11-01), Ellingson
patent: 3720230 (1973-03-01), Stockstill et al.
patent: 4406406 (1983-09-01), Knapp
patent: 4418869 (1983-12-01), Healy

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