A water treatment system is provided with an untreated water reservoir having a cavity through which a filter assembly may traverse such that untreated water in the cavity passes through the filter assembly into a treated water reservoir. Removal of the filter assembly may be facilitated by a seal disengagement element operable to unseat a seal formed during efforts to direct untreated water through the filter assembly.

A gravity-fed filtration system interconnection structure comprising a reservoir for receiving ingress fluid, the reservoir having a bottom surface with a recess for receiving a filter cartridge body, and an opening for filtered fluid egress to a second, dispensing reservoir. A carrier or shuttle having a magnet disposed within or connected to the carrier is adjacent to the reservoir recess and connected to a sluice gate valve which normally blocks the opening to the second reservoir. The interconnection structure further includes a filter cartridge having a housing body, and a filter magnet disposed within or fixedly connected to the housing body. The carrier is normally biased in a first position, such as a closed position, and is moveable between the first position and a second (open) position, and the filter magnet and the carrier magnet are interconnected via magnetic communication upon insertion of the filter cartridge into the reservoir recess, such that upon relative movement of the filter magnet and carrier magnet into an alignment position, the carrier moves to the second position as a result of the magnetic communication. In one embodiment, the carrier translates axially upwards within a channel in the reservoir recess wall as a result of the magnet communication. In another embodiment, the carrier shifts radially in a direction perpendicular to the longitudinal axis of the filter cartridge body. In still another embodiment, the carrier rotates about the longitudinal axis of the filter cartridge. The filter magnet polarity transitions are aligned with the carrier magnet polarity transitions such that a shear force or rotational force is generated between the magnets when the filter cartridge is inserted within the reservoir recess, causing the carrier to move from the first position to the second position.

A water filter cartridge is provided for gravity-feed water filtration applications, and includes a granular filter media made from a mixture of titanium dioxide particles interspersed with granular activated charcoal. The granular filter media is placed in a filter housing having an upper inlet opening and a lower outlet opening. A seal may be disposed around an outer periphery of the housing at its upper region, and may include a flange region that flexes upwardly upon insertion of the sidewall into a filter cartridge opening.

The present disclosure relates to water purification devices, and more particularly to a purification filter element and a water purification cup. The purification filter element includes a housing including a sterilization case, an activated carbon filtering section and an ion exchange resin filtering section from bottom to top. The sterilization case includes a first casing which is filled with brominated polystyrene hydantoin and a first filter screen. A gap is formed between the bottoms of the first casing and the housing. A flow limit hole is provided at the bottom of the housing. The water purification cup includes the purification filter element and a cup body. A water feed cup is detachably fastened in the cup body. A bottom of the water feed cup is connected to the housing of the purification filter element through a connection hole.

A nanocomposite composition for controlling water hardness and a method of producing the nanocomposite, is disclosed. The nanocomposite composition comprises a plurality of semi-interpenetrating polymer network/zeolite-silver nanocomposite, including a polymer matrix. The polymer matrix is dispersed with a plurality of zeolite nanoparticles and a plurality of silver nanoparticles. The method of producing semi-interpenetrating polymer networks/zeolite-silver nanocomposite as hydrogel form comprises microemulsion polymerization of monomeric mixture uses methyl methacrylate (MMA) in presence of ethylene glycol dimethacrylate (EGDM) cross-linker for MMA monomer, acrylamide (AAm), acrylic acid (AAc) and linear poly vinyl alcohol (PVA) monomers in the presence of N,N′-methylene bisacrylamide (MBA) cross-linker and TX-100 surfactant. Further, the prepared nanocomposite is a water hardness removal filter and an efficient inhibition of sulfate-reducing bacteria nanocomposite. Also, the water filter cartridge exhibits a stable filtration performance during large scale production with reduced fluctuation infiltration flow rate and shows highly stable behaviors in high salt concentration.

A liquid treatment device includes a body. The body includes a container section defining a container for holding liquid to be treated and a liquid treatment section defining a cavity and including at least one liquid treatment part. The body includes at least one liquid-impermeable wall defining at least a bottom of the container and at least one wall enclosing the cavity. These walls are inseparable, any seams in transitions between these walls being between parts of the body joined by bonding. The liquid treatment device is provided with at least one first liquid-permeable window allowing liquid to egress from the device and at least one second liquid-permeable window allowing liquid to flow from an interior of the container to the cavity. The liquid treatment device includes a barrier between the cavity and the container interior, inseparable from the body, the barrier including at least one of the second windows.

A portable drinking water filter system, such as a pitcher, having a sleeve and a floatable body including a filter opening configured to receive a water filter, the floatable body having a seal extending outward from an outer surface of the floatable body. The floatable body is disposed in a sleeve cavity such that a body seal engages the sidewall and restricts water from passing between the floatable body and the sidewall. The seal is configured to create friction with the sidewall, wherein the friction created when the floatable body rises in the sleeve is different than when the floatable body lowers in the sleeve. The friction created when the floatable body rises in the sleeve is greater than when the floatable body lowers in the sleeve, allowing the floatable body to auto-retract toward a cavity base without burping.

A filter media can be configured to be securable in an at least partially curved configuration and/or received in a filter housing to form a filter assembly. Water filter media can be adapted for filter-as-you-pour filtration in the context of container (e.g., pitcher) systems where filtering is achieved as the user pours water from the container. The filter housing can have a frame and an optional casing securable about the frame. A filter assembly can include a filter media within, connected to, or associated with a filter housing. The filter media can be securable in an at least partially curved configuration and/or within, connected to, or associated with the filter housing.

A gravity-fed filtration system and method of initiating flow from a filter cartridge to a holding reservoir for a gravity-fed filtration system. The method comprises providing a filter cartridge having a filter magnet, a holding reservoir for filtered fluid, and a first reservoir having a recess receiving cavity in a bottom surface thereof for receiving ingress fluid. Upon inserting the filter cartridge into the recess receiving cavity and moving the filter magnet to be in in magnetic communication with the carrier magnet, a magnetic force moves the carrier magnet from a first position which blocks fluid flow, to said second position which allows fluid flow to the holding reservoir.

A liquid treatment device includes a container section defining a container for holding liquid to be treated. The container section includes at least part of a body, the body including at least one wall forming at least a bottom of the container. At least one first liquid-permeable window through the wall forming the bottom of the container is provided. The device also includes a liquid treatment section, including a cavity surrounded by a cavity side wall forming at least one second liquid-permeable window for treating liquid passing through it. The cavity side wall is sealingly joined to a liquid-impermeable wall section along the circumference of the cavity side wall and around a liquid path through the cavity and the first liquid-permeable windows at an end of the cavity side wall proximal to the at least one first liquid-permeable windows. The liquid-impermeable wall section is an inseparable part of the body.