Abstract: A liquid proportioner is disclosed in which the interior of a flexible bladder located within a tank provides a concentrate reservoir and a dilutant reservoir is provided exteriorly of the bladder. Because the bladder is flexible, the concentrate and the dilutant are maintained at the same pressure. A first orifice system connects with the dilutant reservoir and a second orifice system connects with the concentrate reservoir. An elongated, tubular filter is located within the concentrate reservoir and operates to remove any solids from the concentrate which would otherwise cause clogging of the concentrate orifice system. Because the pressure of the dilutant and concentrate is maintained equal, the level of the concentrate within the concentrate reservoir remains above the upper end of the filter until the supply of concentrate is virtually exhausted. This ensures that the total area of the filter is available for filtering during the entire operation of the proportioner.

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.