| 摘要 |
<p>Embodiments of a gravity-flow filter cartridge (10) are described for removing water-borne parasites, and other contaminants such as chlorine, lead, and organics from water. The filtration cartridge includes a cover (12) having slits (16), a container (30), a liquid porous plastic filter cup (60), 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 cup (60) may include interstitial carbon and other additives to improve performance. The filter cup (60) may be shaped to provide a large surface and optimized wall thickness for providing beneficial filter capacity and water flow rate.</p> |
