A gravity-fed filtration apparatus includes a filter housing having a water inlet near an upper portion of the filter housing and a water outlet near a lower portion of the filter housing. A water filter having a plurality of discs is removably stacked within an interior cavity of the filter housing between the water inlet and the water outlet. An outer perimeter portion of each of the plurality of discs sealingly engages with an inner surface of the filter housing. A first disc of the plurality of discs comprises a first plurality of diffusers and a disinfectant media. A second disc of the plurality of discs comprises a mesh. The lower portion of the filter housing is configured to be disposed in the mouth of a water vessel.

A filter cartridge for a delivery device for a reducing agent includes at least one filter wall and at least one supporting wall together forming an interior space. The at least one supporting wall has an outflow opening and a bypass opening. The outflow opening can be coupled to the delivery device and the bypass opening bypasses the filter wall. A delivery device and a motor vehicle having a filter cartridge are also provided.

A device for filtering ballast water which performs filtering by installing a filter element having a conical shape in a concentric circle direction inside the device for filtering ballast water that accommodates a filter portion, and introducing ballast water from a lower end of the device for filtering and passing same through the filter element inside the device for filtering, and for discharging backwash water containing foreign substances that are inside a filter by way of differential pressure, which is created by a driving portion communicating with a filter element by rotating a suction portion that is located on a lower end of the device for filtering. Particularly, the present invention relates to a high-efficiency candle-type device for filtering ballast water having a high-density filter structure, wherein the driving portion is positioned on a lower portion of a housing so that more filter elements can be accommodated inside the housing.

A device for filtering a stream of water in a channel (2), includes: a wall (6) adapted to be mounted in the channel and including a through-opening, a filter member (10) mounted on the wall opposite the through-opening and including a filter surface projecting relative to the wall, the filter surface having a larger area than would have a flat filter surface fitted in the through-opening, the filter member including retaining members face to face with the filter surface for retaining the bodies that do not pass through the surface, a suction device disposed facing the retaining members, and elements for driving the filter member and/or the suction device in a relative movement of one in relation to the other such that the suction device is successively brought face to face with each retaining member.

A device for filtering a stream of water in a channel (2), includes: a wall (6) adapted to be mounted in the channel and including a through-opening, a filter member (10) mounted on the wall opposite the through-opening and including a filter surface projecting relative to the wall, the filter surface having a larger area than would have a flat filter surface fitted in the through-opening, the filter member including retaining members face to face with the filter surface for retaining the bodies that do not pass through the surface, a suction device disposed facing the retaining members, and elements for driving the filter member and/or the suction device in a relative movement of one in relation to the other such that the suction device is successively brought face to face with each retaining member.

A particle separating system for supplying a cam shaft phase adjuster with cleaned lubricating oil. The phase adjuster includes a stator, a rotor connectable to a cam shaft, and a control valve for hydraulically adjusting the rotational angular position of the rotor relative to the stator. The particle separating system includes an oil separator arranged in the flow of the lubricating oil, upstream of an oil gallery of an engine supplied with the lubricating oil, exhibiting a separation efficiency of at least 50% for particles having a size P1 and a separation efficiency of at least 90% at a size P2>P1; a particle separator arranged downstream of the oil separator and upstream of the phase adjuster or control valve, to clean the lubricating oil for the phase adjuster. The particle separator exhibits a separation efficiency of 50% at a size P3, where P1<P3<100 m.

A filter assembly for allowing groundwater to flow through a hole in a seawall from a landward side of the seawall to a seaward side of the seawall includes a housing with a flange and a perforated shell. The filter assembly also includes a filter cartridge configured to be removably positioned inside the shell and a face plate positioned over the opening and removably connected to the seaward side of the flange thereby securing the filter cartridge inside the shell. The filter assembly also includes a valve member that is operable in an open state and in a closed state. The filter assembly also includes a deflection device connected to a seaward side of the face plate over the valve member. The deflection device is configured to prevent interference of the valve member.

A fuel and/or lubricant system for an engine can include an engine component configured to be in fluid communication with the fuel and/or lubricant, and an alternating current (AC) source electrically connected to the engine component to create an electric field of alternating polarity to subject particles within the fuel and/or lubricant to dielectrophoresis as the fuel and/or lubricant passes through the electric field to prevent deposits from forming on the engine component. In certain embodiments, the engine component can be a filter screen configured to filter the fuel and/or lubricant to subject particles within the fuel and/or lubricant to dielectrophoresis as the fuel and/or lubricant passes through the filter screen.

A saliva pre-processing device is provided. The saliva pre-processing device comprises: a first filter module for filtering out impurities in saliva such that the impurities in the saliva remain on a filter; and a second filter module which receives the saliva from which the impurities are filtered out from the first filter module, and concentrates a target material in the saliva such that the target material in the saliva remains on a filter, wherein the first and second filter modules may have a porous structure.

An assembly (1) for filtering water comprising: a filter (10) forming a permeable receptacle for fluid to be filtered, an actuating inlet (300) for providing a stream of water, a filter fluid inlet (302) for providing fluid to be filtered to the filter (10), and, a rotatable cleaning structure (20) for cleaning the filter (10), wherein the structure (20) comprises at least one scraper (201) extending along and substantially abutting a first surface (101) of the filter (10), the scraper (201) being rotatable with respect to the first surface (101) of the filter (10), and wherein the structure (20) further comprises at least one rotatable element (250) arranged for receiving the stream of water, the stream of water being receivable in, and filterable by, the filter (10) and wherein the element (250) is rotationally engaged with the scraper (201) such that the stream of water providing a rotational force to the element (250), rotates the scraper (201) with respect to the first surface (101) of the filter.