Pumps – Expansible chamber type – Plural pumping chambers
Patent
1977-06-02
1979-02-27
Freeh, William L.
Pumps
Expansible chamber type
Plural pumping chambers
92133, 111 6, 111 72, H01C 2302, F04B 2500
Patent
active
041416767
ABSTRACT:
A method and apparatus are shown for use in mixing agricultural chemicals for placement through an applicator onto the soil. A fumigant is added to anhydrous ammonia in measured amounts as the ammonia is being injected in the field from the applicator under pressure. The liquid fumigant, which is quite corrosive to some of the aluminum valves and fittings ordinarily used with anhydrous ammonia, is pumped under pressure to be mixed with the ammonia downstream from the aluminum valves and fittings that might be damaged thereby and upstream from the applicator so that a solution or homogeneous mixture of the anhydrous ammonia and fumigant can be delivered to the ground without damage to any equipment because of the corrosive characteristic of the fumigant.
REFERENCES:
patent: 822379 (1906-06-01), Lockenback
patent: 2678541 (1954-05-01), Sheen
patent: 2902953 (1959-09-01), Young
patent: 2933049 (1960-04-01), Johnston
patent: 3073256 (1963-01-01), Browne et al.
patent: 3125963 (1964-03-01), Whitley et al.
patent: 3151778 (1964-10-01), Olney et al.
patent: 3806285 (1974-04-01), Sech
patent: 3990816 (1976-11-01), Kohler
patent: 4031778 (1977-06-01), Fazekas
Jannen Robert L.
Johnston Douglas
Freeh William L.
John Blue Company Division of Subscription Television, Inc.
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