Liquid purification or separation – Magnetic – With additional separator
Reexamination Certificate
1999-12-13
2001-04-24
Drodge, Joseph W. (Department: 1723)
Liquid purification or separation
Magnetic
With additional separator
C210S137000, C210S226000, C210S440000, C210S443000
Reexamination Certificate
active
06221245
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to water filtration and processing systems and particularly to systems directed to avoiding or at least reducing problems associated with the formation of calcium scale.
BACKGROUND OF THE INVENTION
One of the most pervasive and vexing problems encountered in water processing systems and appliances is generally referred to as “calcium scale formation” or simply “calcium scaling”. The problem of calcium scale is more pronounced in devices or systems which evaporate or heat water. Thus, devices such as plumbing systems, humidifiers, coffee pots, hot water heaters and so on are maximally plagued by calcium scaling problems. However, all water use or processing systems have some level of problems due to calcium scaling.
Calcium scale is, for the most part, caused by the depositing and/or accumulation of calcium carbonate (generally known as lime) or other calcium salts. Scale is formed as water evaporates from a suitable host surface such as the interior of a water system or processing device. The problem is exacerbated by heating of the water. Unfortunately, once formed, calcium scale does not significantly redissolve back into water and must be addressed by other methods than simply water flushing.
In addition to problems of the calcium scaling, dissolved calcium salts also tend to “harden” water. This all too common problem interferes with the function of soaps and detergents. In residential water systems, this problem is annoying and may diminish the effectiveness of laundering clothing and so on. In commercial systems, such as commercial laundries, hard water significantly impacts the operating costs and resulting profits of the laundering operation.
One of the most common methods of dealing with problems associated with calcium scaling and hard water caused by dissolved calcium salts employs so-called water softening. This process is chemical in nature and involves the addition of chemicals such as sodium chloride to the water process. While conventional chemically operative water softeners provide some water softening effect in the form of reduction of dissolved calcium salts, they require the addition of other chemical agents to the water. This additional chemical content in the water may itself be undesirable and adversely effect water quality. In addition, conventional water softeners generally require an electric or water powered control valve within the softener apparatus. This increases complexity and difficulty of operation as well as system costs.
There remain therefore a continuing need in the art for evermore improved systems and processes for addressing the problems of scaling and hard water associated with dissolved calcium salts. There remains a further need in the art for an improved system and process for minimizing the problems associated with dissolved calcium salts without resorting the addition of chemical agents to the water supply.
SUMMARY OF THE INVENTION
Accordingly, it is a general object of the present invention to provide an improved scale prevention and chlorine removal water filter. It is a more particular object of the present invention to provide an improved scale prevention and chlorine removal water filter which operates without the addition of chemical agents to the water supply.
In accordance with the present invention, there is provided a water filter system for processing water having dissolved solids of calcium ions and carbonate ions therein, the system comprising: an elongated pressure vessel having an upper neck and neck passage and an interior cavity; a fitting having a lower portion sealingly engaging the neck within the neck passage and defining an input passage for receiving a flow of water and an output passage for discharging a flow of water; a catalytic chamber coupled to the input passage supporting a quantity of catalytic media through which water flows, the catalytic media promoting the change of the calcium ions and carbonate ions to suspended sub-micron sized calcium carbonate; a magnetic chamber coupled to the catalytic chamber having a water passage therethrough and a plurality of magnets providing a plurality of reversing magnetic fields within the water passage traversed by water flowing through the water passage; and a quantity of chlorine filter media within the interior cavity of the pressure vessel, the water flowing downwardly through the input passage, the catalytic chamber, the magnetic chamber and upwardly through the chlorine filter media and the interior cavity and outwardly through the output passage.
REFERENCES:
patent: 4422933 (1983-12-01), Sverre et al.
patent: 4495074 (1985-01-01), Hagiwara et al.
patent: 4501661 (1985-02-01), Karasawa
patent: 4731186 (1988-03-01), Belasco
patent: 5356534 (1994-10-01), Zimmerman et al.
Cecil Terry K.
Drodge Joseph W.
Ekstrand Roy A.
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