| 摘要 |
An orally operable, portable, water filtration device. The device includes an elongated tube having an inlet end and an outlet end. The inlet end includes a screen whose openings are in the form of slits. The slits have a width of about 0.005+/-0.003 inch and filter out pollutants of at least that size. The tube also has an integrally formed internal ledge onto which is disposed a porous polypropylene membrane having a pore size of about 5-8 microns. A bed of granulated activated carbon with a grind size of 1230 is disposed inside the tube between the inlet end and the porous polypropylene membrane in a 7:1 ratio (bed height:bed diameter). A mouthpiece, which has an inlet and an outlet, is mounted over the outlet end of the elongated tube so that the mouthpiece and the elongated tube are in fluid communication. To use the device, the inlet end of the tube is inserted into water and suction is applied to the outlet of the mouthpiece.
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