A filter device for treating fluids, in particular for filtering fluids such as fuel, oil, or water, has a housing (56) with a housing pot (58), a housing cover (60), at least one inlet (88) for the fluid to be treated, and at least one outlet (82) for the treated fluid. A connecting head (12) has at least one feed (16) for the fluid to be treated and connectable to the at least one inlet (88), and/or at least one discharge (18). The connecting head (12) and the treatment element (14) can be connected to each other by means of a releasable bayonet-type connecting device (34) through the execution of a rotational/plug-in movement about a connecting axis (20) of the treatment device (10).

One or more techniques and/or systems are disclosed for bypass flow filtering. A bypass valve filter includes at least one wall configured to engage a surface of a bypass valve and a filter surface having a plurality of openings between an inside of the at least one wall and an outside of the at least one wall. One or more openings of the plurality of openings have a first size and one or more other openings of the plurality of openings have a second size, wherein the first size is different than the second size to define different levels of filtering. The bypass valve further includes an open end configured to allow fluid flow therethrough and to the plurality of openings.

Embodiments of a fluid filtration system constructed in accordance with principles of the present disclosure can be used to automatically condition the single use filter for efficient use thereof. For example, in embodiments, the fluid filtration system can include a filter conditioning program containing at least one of a filter priming module, a filter flushing module, and a filter pressurizing module.

A backflow of liquid inside a filter device during an operation of an internal combustion engine is allowed to be obviated while air inside the filter device is purged so as not to generate bubbles in the liquid. An outflow portion that includes a cylindrical portion having a substantially bottomed cylindrical shape and a back pressure valve provided inside the cylindrical portion is provided so as to penetrate a bottom surface of a case. In addition, a lid body provided on the case and an upper plate of a filter element so as to cover an upper end of the case has a first hole that communicates between a space inside the case and a space outside the case. When the back pressure valve opens (a valve body does not abut on a first valve seat), a space inside the filter element communicates with the space outside the case via a second through-hole formed in a side surface of the cylindrical portion.

A system for signaling and/or displaying a depletion condition of a filter cartridge in a water treatment device by means of filtration with replaceable cartridges. The filter cartridge including an identification code which identifies the cartridge and which can be read by means of an optical reader of a portable electronic device. The portable electronic device includes a programmable control interface which can be displayed on a screen of the portable electronic device, by means of which it is possible to acquire identification data of the cartridge, to modify one or more predefined or previously imposed parameters in relation to the conditions of use of the cartridge, and to display the effective duration of the cartridge.

An oil filter for a motor vehicle has a filter cartridge which is disposed in an oil filter housing of the oil filter. The filter cartridge has a channel for filtered oil which is surrounded at least regionally by a filter material in the radial direction. At least one through opening is formed in a wall of the channel. An emergence of filtered oil via the at least one through opening into a channel for the filtered oil provided on sides of the oil filter housing is preventable by bringing the filter cartridge into a first position. An inlet into the channel provided on sides of the oil filter housing fluidically connectable to the at least one through opening by bringing the filter cartridge into a second position in which the filter cartridge is shifted relative to the first position in an axial direction.

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 filter assembly and a method of operating the same to detect water leaks are provided. The filter assembly includes a filter housing for receiving a filter cartridge and at least partially defining a drain trough positioned below the filter cartridge for collecting leaked water. A light source is positioned proximate the drain trough for directing light through the drain trough and a light sensor is positioned proximate the drain trough for sensing the light directed through the drain trough. A controller uses the light sensor to monitor the light generated by the light source and determines that a leak exists when an intensity of sensed light is reduced by the leaked water.

A filtration system includes a filter housing and a filter cartridge. The filter housing includes a base and a cover removably coupled to the base. The cover includes a retainer. The filter cartridge has a longitudinal axis and is movable between an installed position within the filter housing and an uninstalled position outside the filter housing. The filter cartridge includes a top endplate including at least one protrusion extending upwardly away from the top endplate. The protrusion includes a tab extending radially outward from the protrusion that is structured to interact with the retainer to removably couple the filter cartridge to the cover. The filter cartridge further includes a bottom endplate and a filter media extending axially between the top endplate and the bottom endplate.

The invention relates to a pressure oil filter system for a hydraulic transmission, in particular for a motor vehicle transmission, comprising at least one oil pump which can be actuated as required and which has a pressure side and a suction side, a pressure line to a consumer and at least a first oil filter which is arranged at the pressure side of the oil pump in the pressure line, wherein means for damping pressure surges during intermittent operation of the oil pump are provided in the pressure line upstream of the first oil filter in the flow direction of the oil.