Dispensing – Automatic control – By weight – volume or pressure of a second dispensed material
Patent
1977-06-23
1980-03-18
Spar, Robert J.
Dispensing
Automatic control
By weight, volume or pressure of a second dispensed material
222 67, 222 94, 222547, 366152, 366162, 366178, B54D 3522
Patent
active
041935160
ABSTRACT:
A liquid proportioner is disclosed which is particularly adapted for mixing medicaments or the like in the drinking water supplied to animals. The proportioner provides two separated chambers one of which contains medicament and the other which contains water. An orifice system connects each chamber to a mixing chamber. The first orifice system includes a plurality of parallel connected orifices connecting the water chamber and the mixing chamber. The second system includes a plurality of series connected orifices connecting the medicament chamber and the mixing chamber. The two liquids are maintained at substantially the same pressure. In the illustrated embodiment all of the orifices are the same size and the series connected orifice system has a hydrodynamic flow value which is substantially smaller than the hydrodynamic flow value of each of the parallel connected orifices. With such system accuracy of proportioning flow is maintained over substantial ranges of flow and is maintained at low flow rates even when the specific gravity of the medicament is substantially greater than the specific gravity of water. A ball valve operates to close off the medicament orifice system under no flow conditions. Such valve is opened in response to water flow and is operable to re-establish proper proportioning flow even at extremely low proportioner flow rates.
REFERENCES:
patent: 1014048 (1912-01-01), Byers
patent: 1699297 (1929-01-01), Ledbetter
patent: 3194434 (1965-07-01), Evanson
patent: 3406870 (1968-10-01), Arneson
patent: 3799402 (1974-03-01), Meister et al.
patent: 3809291 (1974-05-01), Purdy
Purdy Chester A.
Purdy George A.
Purdy Proportioners, Ltd.
Silverberg Fred A.
Spar Robert J.
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