Multi-layered composite filter media and pleated filter element constructed therefrom
AssigneeLiquidity Corporation
InventorsMichael Hawes, Sylvie Chavanne, Tomás Colussi
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Abstract
A multi-layered pleated filter element for filtering drinking water is disclosed which includes at least one upstream glass fiber layer for pre-filtration, a nanofiber membrane layer for bacteria retention, and at least one downstream positively charged microporous membrane layer for virus retention.
Claims28
A multi-layered composite filter media comprising:
- a) at least one pre-filtration layer;
- b) a bacteria retention layer;
- and
- c) at least one virus retention layer.
A multi-layered pleated filter element comprising:
- a) at least one upstream glass fiber layer for pre-filtration;
- b) an interior nanofiber membrane layer for bacteria retention;
- and
- c) at least one downstream positively charged microporous media layer for virus retention.
A filter cartridge comprising:
- a) a housing having an inlet region for the ingress of an unfiltered fluid and an outlet region for the egress of filtered fluid;
- and
- b) a multi-layered pleated filter element disposed within the housing and including:
- i) at least one upstream layer for pre-filtration;
- ii) an interior nanofiber membrane layer for bacteria retention;
- and
- iii) at least one downstream positively charged microporous media layer for virus retention.
A filter cartridge as recited in Clam 21, wherein the upstream pre-filtration layer is positioned at the inner periphery of the pleated filter element.
A filter cartridge as recited in Clam 21, wherein the downstream virus retention layer is positioned at the outer periphery of the pleated filter element.
Dependencies are inferred from the claim text.