Modular drinking water filtration system with locking arrangement to assure filter cartridge compatibility
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United States of America Patent
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Feb 16, 2010
Grant Date -
Sep 24, 2009
app pub date -
Mar 21, 2008
filing date -
Mar 21, 2008
priority date (Note) -
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Abstract
A modular filter system using replaceable filter cartridges includes a locking arrangement that prevents rotation of the flow control valve spindle in the filter head, but includes an unlocking arrangement on the cartridge that unlocks the locking arrangement if the proper replacement cartridge is used. The locking arrangement may include spring biased locking pins carried on the filter head and matching unlocking pins on the filter cartridge to operate through an intermediate adaptor ring that is set on assembly to match the positions of the locking and unlocking pins.
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