Filtration device for liquid purification
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United States of America Patent
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-
May 14, 2002
Grant Date -
N/A
app pub date -
Feb 17, 2000
filing date -
Aug 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is directed to purification of liquids, such as drinking water using filters, wherein filtration is effected while the liquid flows upwardly. The invention includes both the method and a device enabling the method to be carried out. The device is constructed to intake impure liquid at the bottom of the filter and initially to effect flow by filling liquid to above the filter outlet near the top, and maintaining flow thereafter by virtue of the presence of a low internal pressure that develops as the liquid passes through the system.
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