Patent ID: 9028690
Filing Date: 2015-05-12
Classification: C02F

Abstract:
1. A manually-operated gravity-flow water treatment cartridge for use in a portable water treatment device having a filtered water reservoir, the water treatment cartridge comprising: (a) a housing comprising a framework defining a plurality of compartments, wherein the housing is configured for removable arrangement in the water treatment device; (b) solid particulate water treatment media loosely arranged in each of the compartments; (c) a media retaining member extending across an end of the framework for retaining the solid particulate media within the housing; (d) a flow regulating member arranged over the media retaining member, the flow regulating member being a fibrous meltblown nonwoven polymeric web, and wherein the flow regulating member restricts the flow of water through the solid particulate water treatment media thereby increasing the amount of time the water is in contact with the solid particulate water treatment media and the flow rate of water through the water treatment cartridge at a pressure head of ¾ inch (1.9 cm) of water is at least about 0.03 liters per minute (lpm) and no greater than about 5.0 lpm at a pressure head of 2 inches (5.1 cm) of water.