Cuno, Inc.

3M Innovative Properties Company

Donald L McGibbon

Laurence W Bassett

Provided are media cartridges that have adjustable bypasses, and systems and methods that use them. Aspects include an adjustable bypass filter cartridge where a treated stream and an adjusted non-treated stream combine prior to post-filtration and the percentage or ratio of treated the and the non-treated water is adjustable at the time of installation from the outside of the filter cartridge with a known or predictable level of bypass. Media cartridges comprise: an inlet in fluid communication with a feed chamber and an outlet in fluid communication with a mixing compartment; a media compartment containing a media; a bypass port in fluid communication with the feed chamber and the mixing compartment. Such cartridges can be adjusted to meet the needs of a wide variety of end uses.

Media cartridge with adjustable bypass

A filter cartridgeincludes a connective end for mating with a filter headand providing fluid communication between the filter media chamber and the filter head. The connective end includes a tubular memberdisposed axially in a hollow neckto define inner and radially outer axial passages () providing independent conduits for dual flow through the neck. The outer axial passage includes an openingin the elongated portionof the neck and a bypass openingin the distal end portion of the neck. The inner axial passage includes an openingin the distal end of the neck. Proximal and distal radial seals () are provided on the outer periphery of the elongated neck portionto ensure water-tight engagement when the neck is inserted into the receiving core of the filter head.

Filter cartridge having bypass feature

A filter system (50) includes first and second filter heads each including a housing receptacle and a filter receptacle. The second filter head (10) includes an inlet (42) providing fluid communication to the housing receptacle; an unfiltered-fluid outlet (44) connected to the inlet of the first filter head (9) via an unfiltered-fluid line (64); and a filtered-fluid outlet (46) providing fluid communication to the filter receptacle and connected to the filtered-fluid opening (32) of the first head via a filter-fluid line (62). A filtered-fluid outlet (47) is provided in the first head for filtered fluid to leave the system. A plug (34) is also included to prevent fluid communication between the filtered- and unfiltered-fluid outlets within the bore (24) of the second filter head.

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Southington, CT, United States of America

Donald L McGibbon