A zone water-treatment cartridge (3) for a water-treatment device, wherein the device comprises a head comprising a port for feeding water for treatment to the cartridge (3) and a port for discharging water from the cartridge after treatment. The zone water-treatment cartridge (3) comprises a first inlet channel (6) and a second inlet channel (7) for feeding water for treatment to the cartridge (3), configured to form a fluid communication with the port of the head for feeding water to the water-treatment cartridge (3), and an outlet channel for discharging water after treatment from the cartridge (3), configured to form a fluid communication with the port for discharging water after treatment from the cartridge (3), a first water-treatment zone, which is in a fluid communication with the first inlet channel (6), a second water-treatment zone, which is in a fluid communication with the second inlet channel (7), the first water-treatment zone and the outlet channel, respectively. The zone water-treatment cartridge (3) comprises orienting means (11) configured to establish a flow of water for treatment from the port of the head for feeding water for treatment through at least one of the fist inlet channel (6) and the second inlet channel (7) by rotation of the zone water-treatment cartridge (3) in the head of the zone water-treatment device. The invention also relates to the head of a zone water-treatment device for use with a zone water-treatment cartridge and to a zone water-treatment device comprising a head and a zone water-treatment cartridge.

An engine oil strainer includes a lubricating oil passage, and an oil inlet and an oil outlet which are respectively disposed at two ends of the lubricating oil passage. The engine oil strainer further includes a check valve which is disposed at the oil inlet and which only allows a lubricating oil to flow into the lubricating oil passage. Also disclosed herein are a lubrication system employing the engine oil strainer, and an internal combustion engine having the lubrication system. When the internal combustion engine stops operating, the lubricating oil flows back from the oil outlet into the engine oil strainer. Since the check valve is disposed at the location of the oil inlet of the engine oil strainer, the lubricating oil flowing back into the engine oil strainer is not capable of proceeding to flow back from the oil inlet into the oil pan.

The present invention relates to a filter for filtration of oil and/or fuel comprising a combination of a bypass filter portion and a full flow filter portion. The present invention also relates to a method of using the filter for filtration of oil and/or fuel to remove the water/moisture and particulate contaminants therein.

A water purifying filter cartridge structure includes: a filter cartridge main body and a filter cartridge bottom seat. The filter cartridge main body includes: a filter barrel, a filter barrel cover, a filter body, a filter chamber, and a back flow check component. The filter barrel cover is disposed on a top portion of the filter barrel. The filter body is adapted to remove impurities from water. The filter chamber is disposed in the filter barrel, and the back flow check component is disposed in the filter barrel. The back flow check component includes a first back flow check piece, a second back flow check piece, and a third back flow check piece. The first back flow check piece and the second back flow check piece are adapted to prevent back flow at the water input end.

Disclosed are capsule/tube connector/tube assemblies that eliminate a connection point in a filter capsule apparatus. A relatively soft tube is thermally or sonically bonded to a relatively hard tube connector that may have a tube receiving bore, a frustoconical tube receiving channel or a straight tube receiving channel. The tube connector is bonded to a filter capsule port. The manufacturing process can be either a one-step process bonding the tube and capsule during formation of the tube connector in one step, or a two-step process that binds the tube to the tube connector in one step and binds the tube connector to a filter capsule port in a second step. Single and dual-walled tubes may be used as well as single and dual-walled tubes having reinforcing material superposed about or embedded in the tube wall(s). A tube support collar is also disclosed. Also disclosed are capsule port/tube connector/tube combinations in which capsule port tips and tube connectors are combined to create tube-receiving gaps or channels to secure a tube to a capsule assembly. Multiple capsule/tube connector/tube assemblies may be connected to form a filter train.

Disclosed are capsule/tube connector/tube assemblies that eliminate a connection point in a filter capsule apparatus. A relatively soft tube is thermally or sonically bonded to a relatively hard tube connector that may have a tube receiving bore, a frustoconical tube receiving channel or a straight tube receiving channel. The tube connector is bonded to a filter capsule port. The manufacturing process can be either a one-step process bonding the tube and capsule during formation of the tube connector in one step, or a two-step process that binds the tube to the tube connector in one step and binds the tube connector to a filter capsule port in a second step. Single and dual-walled tubes may be used as well as single and dual-walled tubes having reinforcing material superposed about or embedded in the tube wall(s). A tube support collar is also disclosed. Also disclosed are capsule port/tube connector/tube combinations in which capsule port tips and tube connectors are combined to create tube-receiving gaps or channels to secure a tube to a capsule assembly. Multiple capsule/tube connector/tube assemblies may be connected to form a filter train.

A filtering device includes a water pump, a filter cartridge, and a communicating tube for coupling the water pump with the filter cartridge. The filtering device further includes a flow switch attached to the communicating tube and configured to change switching states in response to a water flow rate in the communicating tube being lower than a predetermined value. The filtering device further includes a reminding device operably connected to the water flow switch. The reminding device generates a reminder signal when the state of the water flow indicates that the flow rate of the water in the communicating tube is lower than the predetermined value. The control system includes a control panel for the filtering pump, a central control system, and a filtration detecting system. The control panel is connected to the central control system and the central control system is connected to the filtration detecting system.

In general, techniques are described for filter media monitoring within a filtration system. The filter media monitoring techniques described herein include, for example, direct contact with the filter media, e.g., a sensor may be located inside a boundary defined by a surface of the filter media, or indirect contact with the filter media, e.g., a sensor may be located outside the boundary defined by the surface of the filter media such that the sensor does not make direct physical contact with the filter media being monitored.

A filter device includes in a filter housing a hollow cylindrical filter element having frontal end plates. A port having a first sealing element is incorporated into a cover the filter housing, said sealing element being arranged coaxially relative to a second sealing element in a flow opening in the end plate.

The fluid filter assembly includes a container and a filter media that is disposed in the container and partially divides it into an unfiltered space and a filtered space. A bypass valve assembly is disposed at one axial end of the filter media and includes an end cap and a valve housing, which has a through opening. The end cap is in engagement with an end face of the filter media. The bypass valve assembly further includes a valve plug which has a head portion and a tail portion. The valve plug is biased into a closed position by a compression spring and is moveable from the closed position to an open position to allow the fluid to flow directly from the unfiltered space to the filtered space. The valve housing and the end cap are made as a monolithic piece.