Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2001-02-15
2003-02-18
Barry, Chester T. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S678000, C210S687000, C210S136000
Reexamination Certificate
active
06521132
ABSTRACT:
This invention relates to an ion exchange water softener, particularly a self-regenerating water softener, wherein an ion exchange resin, after being depleted through use in water softening, is automatically regenerated by the simple act by the user of turning the water on for purposes of use, and turning it off after use. This invention further relates to an automatic method for regenerating the resin.
It is not new to regenerate a zeolite bed used for water softening, or to use a brine, such as sodium chloride brine, to regenerate a zeolite bed contained in a tank. The patent to Duden U.S. Pat. No. 1,611,422 discloses a typical apparatus having a tank for the zeolite, a separate tank for salt and water, and a further separate compartment for the brine that is used to regenerate the zeolite.
The devices of the prior art involve a substantial amount of piping and valving, and require considerable manipulation on the part of the person using the softened water.
It is an object of this invention to avoid all such complications, and to make the regeneration of the zeolite automatic, as a simple on-off valve is turned on and off for the purpose of use of the softened water.
Another object of this invention is to provide a self-regenerating ion exchange water softener of any size or shape, which is not required to be permanently connected into the plumbing system of a house or factory, but which can be moved from place to place as desired, merely by being connected to a source of raw water under pressure.
REFERENCES:
patent: 1233016 (1917-07-01), Bartlett
patent: 1423132 (1922-07-01), Magrath
patent: 1611622 (1926-12-01), Duden
patent: 1703451 (1929-02-01), McGill
patent: 1873305 (1932-08-01), DeVille
patent: 2006287 (1935-06-01), Wilbanks
patent: 2347201 (1944-04-01), Lindsay
patent: 2627503 (1953-02-01), Anderson
patent: 2832373 (1958-04-01), Scholer
patent: 3342336 (1967-09-01), Rose
patent: 4698272 (1987-10-01), Inokuti et al.
Barry Chester T.
Schnader Harrison Segal & Lewis LLP
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