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Modular Drinking Water Filtration System with Adapter Rings for Replaceable Cartridges to Assure Proper Fit

  • US 20090236276A1
  • Filed: 03/21/2008
  • Published: 09/24/2009
  • Est. Priority Date: 03/21/2008
  • Status: Active Grant
First Claim
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1. In the combination of a replaceable water filter cartridge having a filter body with an axially extending neck on one end having an inlet and an outlet for water, and a filter head having a cylindrical interior wall adapted to demountably receive and surround the cartridge neck inserted axially into the head, an arrangement for assuring compatibility and operative connection of the cartridge to the filter head comprising:

  • a first adaptor ring having a first half of a locator device formed thereon, the first adaptor ring formed independently of the filter head and mounted in the head coaxially with the interior wall, said adaptor ring secured to the filter head to place the first half of the locator device at a circumferentially selected position; and

    ,a second adaptor ring having a second half of the locator device formed thereon, the second adaptor ring formed independently of the filter cartridge and mounted on the filter cartridge surrounding the neck and coaxially therewith, said second adaptor ring secured to the filter cartridge to place the second half of the locator device at a circumferentially selected position to engage the first half and permit operative connection of the cartridge to the head.

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