Gravity-flow filtration cartridge for the removal of microorganisms and/or other contaminants
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United States of America Patent
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Feb 25, 2003
Issued Date -
N/A
app pub date -
Aug 7, 1998
filing date -
Aug 27, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Embodiments of a gravity-flow filter cartridge are described for removing water-borne parasites, and other contaminants such as chlorine, lead, and organics from water. The filtration cartridge includes a liquid porous plastic filter, which has pore diameters large enough to let water pass at acceptable flow rates under only the force of gravity, while the matrix creates a tortuous path which traps parasites and other microorganisms that are typically in the approximately 3-9 micron size range. The filter may include interstitial carbon and other additives to improve performance. The filter may be shaped to provide a large surface and an optimized wall thickness for providing beneficial filter capacity and water flow rate.
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