Patent ID: 6254768
Filing Date: 2001-07-03
Classification: C02F

Abstract:
A water filtering carafe comprising:a raw water reservoir and a filtered water reservoir, the reservoirs being separated by a partition and the filtered water reservoir comprising a recess in a sidewall thereof;a gravity-flow cyst reduction water filter cartridge having an inlet opening for raw water, an outlet opening for filtered water, and an asymmetric outer cartridge surface of substantially semicircular cross-section;a mounting receptacle in the partition for mounting the water filter cartridge in the partition with the inlet opening in communication with the raw water reservoir and the outlet opening in communication with the filtered water reservoir; anda cyst-blocking water seal between the water filter cartridge and the receptacle within the partition formed by positive, locking seal means;the cartridge providing a visual indication that a cyst-blocking water seal has been provided through rotation substantially into and largely occupying a recess in the filtered water reservoir;the water filter cartridge incorporating a cellular ceramic honeycomb filter element of a selectively plugged channel configuration wherein all water filtration paths traverse porous channel walls having a porosity characterized by a median pore diameter in the range of about 2-8 micrometers wherein pores over 10 microns in diameter comprise not more than 10% of the open pore volumes and the combination of the water seal and water filter cartridge providing at least 99.95% removal of 34 .mu.m particles from a raw water stream passing from the raw water reservoir to the filtered water reservoir when the water stream is tested in accordance with NSF Standard 53, Drinking Water Treatment Units--Health Effects (September 1997).