Liquid purification or separation – Processes – Extracting utilizing solid solute
Patent
1980-03-31
1985-05-28
Bernstein, Hiram H.
Liquid purification or separation
Processes
Extracting utilizing solid solute
210169, 4448, E04H 320
Patent
active
045199140
ABSTRACT:
For water treatment in swimming pools, cooling towers, hot tubs, and other systems it is desired to feed various chemicals in small quantities but at optimum rates into the system. In several embodiments of the invention the water is recirculated through the system which usually includes a filter. It has been discovered that the chemicals can be fed by enclosing them in generally spherical plastic capsules suggestive of table-tennis balls, but about the size of a baseball. The rate of feeding depends upon the size and number of small holes which are provided, or the user pokes through the shell of the capsule, upon the solubility of the chemical, and upon the flow rate of the water through a strainer, skimmer, or other chamber in the system into which the capsule is introduced. The random orientation of the capsule tends to average out variations. In other embodiments, the capsule is weighted to direct the small holes upward as it rests in quiet water, thereby substantially stopping the flow of chemical; but as the water is sloshed about in use, the chemical is dispensed at a rate proportional to the amount of use. Safety, convenience, and economy are among the asserted advantages. Invention is seen in the new use of such capsules for the purposes indicated.
REFERENCES:
patent: 429384 (1890-06-01), Manwarnig
patent: 2826484 (1958-03-01), Buchler
patent: 3633538 (1972-01-01), Hoeflin
patent: 3677408 (1972-07-01), Dinzo
patent: 3684460 (1972-08-01), Arneson
patent: 3706140 (1972-12-01), Brillond
patent: 3846078 (1974-11-01), Brett
patent: 3924807 (1975-12-01), Morgan
Bernstein Hiram H.
Larsen Jack
Wells Gilbert L.
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