Abstract: A filter cartridge has a shell defining an upper portion with an upper interior volume and a lower portion with a lower interior volume. The cartridge is for use in gravity-fed water treatment systems having an upper untreated supply and a lower filtered container. A hydrophilic porous particulate carbon powder block filter in a polymeric binder is disposed in the cartridge. The filter has a central opening and is open on both ends. The top end of the block is fitted with an air vent tube. The lower end of the block is fitted into a rubber gasket to direct water flow into the lower container. As water flows through the filter cartridge, air is vented through the block filter central opening and out through the vent tube.

Abstract: A filter cartridge has a shell defining an upper portion with an upper interior volume and a lower portion with a lower interior volume. The cartridge is for use in gravity-fed water treatment systems having an upper untreated supply and a lower filtered container. A hydrophilic porous particulate carbon powder block filter in a polymeric binder is disposed in the cartridge. The filter has a central opening and is open on both ends. The top end of the block is fitted with an air vent tube. The lower end of the block is fitted into a rubber gasket to direct water flow into the lower container. As water flows through the filter cartridge, air is vented through the block filter central opening and out through the vent tube.

Abstract: A filter cartridge has a shell defining an upper portion with an upper interior volume and a lower portion with a lower interior volume. The cartridge is for use in gravity-fed water treatment systems having an upper untreated supply and a lower filtered container. A hydrophilic porous particulate carbon powder block filter in a polymeric binder is disposed in the cartridge. The filter has a central opening and is open on both ends. The top end of the block is fitted with an air vent tube. The lower end of the block is fitted into a rubber gasket to direct water flow into the lower container. As water flows through the filter cartridge, air is vented through the block filter central opening and out through the vent tube.

Abstract: A filter cartridge has a shell defining an upper portion with an upper interior volume and a lower portion with a lower interior volume. The cartridge is for use in gravity-fed water treatment systems have an upper untreated supply and a lower filtered container. A hydrophilic porous particulate carbon powder block filter in a polymeric binder is disposed in the cartridge. The filter has a central opening and is open on both ends. The top end of the block is fitted with an air vent tube. The lower end of the block is fitted into a rubber gasket to direct water flow into the lower container. As water flow through the filter cartridge, air is vented through the block filter central opening and out through the vent tube.

Abstract: A method for continuous extrusion of activated carbon tubular shapes used in a water filtration device and process for making same. A mixture of primarily activated carbon and polymeric binder is gravity fed into an extruder barrel through a slide to facilitate uniform feed. The binder is surface charged by a plasma process to attach to the carbon with a weak force. The barrel is heated by induction heating to provide high and constant heat source. A desired porosity in the carbon profile is achieved by varying the mesh size of the carbon and binder along with changing the pitch in the screw.

Abstract: A multi-stage water purification device includes an untreated water compartment having an untreated water inlet and a treated water compartment formed from a resilient material. The compartments are segregated from one another. An outlet is in flow communication with the treated water compartment. A first unidirectional valve is disposed between the treated water compartment and the outlet and is configure to permit flow out of the treated water compartment only. A filter is disposed between the untreated water compartment and the treated water compartment. The untreated water flows through the filter to produce treated water. A second unidirectional flow valve is positioned at the discharge of the filter and is configured to permit flow out of the filter and into the treated water compartment only. Water is introduced into the untreated water compartment and the treated water compartment is deformed to reduce the volume therein.

Abstract: A universal water purifier unitary assembly device comprising a device housing unit support structure, a manually operated air pump, a force-fed water filter cartridge of multiple separable stages and a separable sealing means to seal the junction and opening between said universal water purifier unitary assembly device housing unit support structure and water container of water to be filtered wherein junction and opening between of said water purifier unitary assembly device housing unit support structure and said water container is sealed to retain compressed air. Water of said container is filtered, treated and used as needed on demand as in a group environment wherein individual use and consumption of purified water is relevant. The water is stored in a container, being pumped from the container by compressed air provided by an air pump.

Abstract: A bonding method for a filtration unit for bonding a polymeric end cap to a porous filter element body includes providing a polymeric end cap of a filtration unit, providing a porous filter element body and positioning a hot melt adhesive element and a metal element between the porous filter element body and the end cap. A pressure is applied between the porous filter element body and the end cap and an electromagnetic field is induced at the metal element. The hot melt adhesive is melted and flows between the end cap and the porous filter element body and a bond is formed between the porous filter element body and the end cap.

Abstract: A filter cartridge for use in gravity-fed water treatment systems wherein filter elements include a dome-shaped hydrophilic porous particulate carbon powder block filter in a polymeric binder. The filter has a closed upper end and an open lower end with sidewalls extending there between, additional filter media and includes ion exchange resins and a fine mesh hydrophilic filter sheet to reduce contaminant content of water for drinking purposes.

Abstract: A universal water purifier unitary assembly device comprising a device housing unit support structure, a manually operated air pump, a force-fed water filter cartridge of multiple separable stages and a separable sealing means to seal the junction and opening between said universal water purifier unitary assembly device housing unit support structure and water container of water to be filtered wherein junction and opening between of said water purifier unitary assembly device housing unit support structure and said water container is sealed to retain compressed air. Water of said container is filtered, treated and used as needed on demand as in a group environment wherein individual use and consumption of purified water is relevant. The water is stored in a container, being pumped from the container by compressed air provided by an air pump.