Modular drinking water filtration system with bottom load cartridges with grip-enhanced end rings and color coding
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United States of America Patent
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Jun 2, 2009
Grant Date -
N/A
app pub date -
Mar 21, 2008
filing date -
Mar 21, 2008
priority date (Note) -
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Abstract
An assembly method and related subassembly for a water filter element in the housing of a replaceable filter cartridge provides for filter element insertion into the open bottom end of the housing and subsequent attachment of a retaining ring to the upper end of the element such that the element is secured against vertical drop-out until the bottom end of the cartridge can be enclosed with an end cap. The method and subassembly are particularly well adapted to cartridges in which the lower end cap is attached by spin welding. The enclosing end cap may also be provided with end rings to enhance the user's grip in cartridge installation and removal. The end rings may also be color coded for each of cartridge identification and matching to the filter head.
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