Filter for purifying domestic drinking water
AssigneeCalgon Carbon Corporation
InventorsCharles Joseph Carr, Richard William Farmer
Life of this patent
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Abstract
An improved filter is provided for lowering levels of contaminants in domestic drinking water. The filter contains an oxidized activated carbon and at least one other type of adsorbent to remove cationic species and at least one other contaminant. The filter further achieves an efficient use of the adsorbents by including an envelope containing part or all of the adsorbents, which envelope minimizes the potential for flow by-pass.
Claims14
A gravity-flow filter for lowering levels of contaminants in drinking water comprising a housing for filtering water having an inlet port and an outlet port, said housing containing between said inlet port and outlet port an oxidized activated carbon cloth or fabric and at least one other adsorbent selected from the group consisting of activated carbon, zeolite, ion exchange resin, silica gel, and activated alumina.
A gravity-flow filter for lowering levels of contaminants in drinking water comprising:
- (a) a filter housing having an inlet port and an outlet port;
- and
- (b) an elongated envelope being disposed within said filter housing and spaced apart therefrom to define a space therebetween, said envelope including at least one retainer means, said envelope containing an oxidized activated carbon cloth or fabric and at least one other adsorbent selected from the group consisting of activated carbon, zeolite, ion exchange resin, silica gel, and activated alumina.
A gravity-flow filter for lowering levels of contaminants in drinking water comprising:
- (a) a filter housing having an inlet port and an outlet port;
- and
- (b) an elongated envelope being disposed within said filter housing and spaced apart therefrom to define a space therebetween, said envelope including at least one retainer means, said envelope containing an oxidized activated carbon and at least one other adsorbent selected from the group consisting of activated carbon, zeolite, ion exchange resin, silica gel, and activated alumina, wherein said space between said envelope and said filter housing is occupied by an adsorbent selected from the group consisting of activated carbon, zeolite, ion exchange resin, silica gel, and activated alumina.
Dependencies are inferred from the claim text.