Planting – Liquid or gas soil treatment – Hand manipulated
Patent
1977-03-04
1978-09-26
Knowles, Allen N.
Planting
Liquid or gas soil treatment
Hand manipulated
222608, 239170, A01C 2302
Patent
active
041161386
ABSTRACT:
A control valve for automatically controlling fluid fertilizer is introduced in a fluid fertilizer application system of the type comprising: a fertilizer supply; an implement having fertilizer application elements; means for moving said application elements between a lowered, application position and a raised, transport position; and conduit means for delivering fertilizer from the fertilizer supply to the application elements. The control valve is interposed in the conduit means between the fertilizer supply and the application elements and has a control lever terminating in a saddle adapted to receive a projection. A collapsible and extendable valve actuator means, which is responsive to the means for moving the application elements between raised and lowered positions and which has thereon a projection adapted to engage the valve control lever, controls the valve such that it is closed when the application elements are raised and open when the application elements are lowered.
REFERENCES:
patent: 2731901 (1956-01-01), Tye
patent: 2831502 (1958-04-01), Osborn
patent: 2838825 (1958-06-01), Knollenberg
patent: 3044712 (1962-07-01), Tanke
patent: 3793967 (1974-02-01), VandenBerg
patent: 3905523 (1975-09-01), Ahlers et al.
McFarland David Lee
McFarland Raymond Joseph
Knowles Allen N.
Silverberg Fred A.
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