Abstract: A filter device has a filter element (3) received in a filter housing (1) and has a holding device (19) for detachably fixing the filter element in the filter housing (1). Corresponding threads (23, 33) form a screw connection between a housing cover (5) of the filter housing (1) and the filter element (3). A sealing device (29, 35) imparts a sealing action between the filter element (3) and the housing cover (5). The screw connection is formed by threads (23, 33) situated in the interior (22) of the filter element (3). The thread (33) assigned to the filter element (3) is situated on a connecting pipe piece (31) that, as a constituent part of an end cap (17) of the filter element (3), extends into the inner filter cavity (22) of the filter element (3). The thread (23) assigned to the housing cover (5) is situated on a receiving pipe piece (21), which can be screwed to the connecting pipe piece (31) of the filter element (3).

Abstract: A filter device has a filter housing having two separable housing parts (1 and 11) that can receive at least one filter element (21). The housing parts can be connected to one another by a coupling device (7). The filter element (21), or an adapter that can be connected to it, forms a functionally essential component of the coupling device (7). Only when the filter element (21) has been placed in its functional position within at least one of the housing parts (1, 11), can the housing parts (1, 11) be connected to form the filter housing of a functional filter device.

Abstract: A filter device, in particular for fluids polluted with admixtures of water, such as diesel oil, includes a filter housing (1) having a fluid inlet (51), a fluid outlet and at least one filter element (9). During the filtering process, fluid can flow through the filter medium (11) of the filter element from the unfiltered side (13) to the filtered side (19) of the filter medium. The filtered side surrounds an inner filter cavity (17). On one side of the filter medium (11), a water-separating device (26) and a separating region (27) for separated water are present. The filter element (9) has a passage (43) that forms a fluid connection to the filter cavity (17) and at least one water opening (47) that is open toward the separating region (27). The filter element can be fixed to an element receptacle (29) of the filter housing (1) and can be connected to a water collecting chamber (33).

Abstract: A filtering device includes multiple filtering elements (3) with bodies defining longitudinal axes. The filtering elements (3) are arranged adjacent to one another in a housing such that the longitudinal axes extend parallel to one another. The bodies of at least some of the filtering elements (3) have a shape that deviates from a circular cylinder at at least one part of the body length. The filtering elements (3) with bodies having a shape deviating from a circular cylinder have a cross-sectional size at least partially changing from one end to the other end. The filtering elements are oriented in the housing such that the regions of a larger cross-section are associated with the regions of a smaller cross-section in adjacent filtering elements.

Abstract: A filter device for fluids, especially for fuels such as diesel fuel, includes a filter housing (1) defining a longitudinal axis (19). The filter housing has a fluid inlet (14) and a fluid outlet (24) and can accommodate at least one filter element (9). The fluid can, during filtering, flow through a filter medium (11) surrounding an inner filter cavity. The filter element (9) is enclosed by an end cap (21) on its lower end facing the bottom part (5) of the filter housing (1). The end cap has a passage (29) forming a fluid connection to the inner filter cavity (17) and can be fixed to an element retainer (23) of the filter housing (1). The element retainer (23) includes retaining piece (35) on the bottom part (5) of the filter housing (1). The retaining piece is open towards the filter element (9) with a fluid channel (37) leading to a housing connection (24) running into it.

Abstract: A process separates out and removes water present in liquid fuels. The fuel supplies an internal combustion engine by a fuel delivery pump (12). Water is separated out at a filter (5) having a collecting space (27) for collecting separated water and connected upstream of the suction side (11) of the fuel delivery pump (12). The pump suction action counteracts outflow of water from the collecting space (27). Depending on the amount of water collected, the pump suction action is negated, and an outlet valve at an outflow orifice (37) of the collecting space (27) is opened by a discharge (43, 53) producing a pressure gradient enabling the discharge of water from the collecting space (27) over a discharge period when the fuel delivery pump (12) is operating.

Abstract: A device for branching a fluidic partial flow off a main flow by a hydraulic pump (10) includes individual main chambers (12, 14, 16, 18, 20) sealed from each other and divided into functional groups, and operates according to the displacement principle. The chambers enable fluid from at least one main flow inlet (22) to be transported from an inlet or suction side to an outlet or pressure side of the hydraulic pump (10) and then via at least one main flow outlet. At least one independent partial chamber (26) is provided for the transport of the partial flow in addition to the main chambers (12, 14, 16, 18, 20). The partial chamber forms part of the pressure side of the hydraulic pump (10) and is connected to an independent partial current outlet (42) separate from the main flow inlet (22) and the main flow outlet (24).

Abstract: A filter device, in particular for fluids polluted with admixtures of water, such as diesel oil, includes a filter housing (1) having a fluid inlet (43), a fluid outlet (44) and a filter element (9). During the filtering process, the fluid can flow through the filter medium (11) of the filter element from the unfiltered side (14) to the filtered side (13) of the filter medium and into its inner filter cavity (17). On at least one side of the filter medium (11), a water-separating system (23) has a separating region (25) for separated water. The water separating system is connected via at least one water opening (35) that is open toward the separating region (25) to a water collecting chamber (45). The filter element (9) has a passage (29) forming a fluid connection to the inner filter cavity (17) and can be connected to an element receptacle (47) of the filter housing (1). A fluid-conveying system (41) forms fluid paths separated from each other.

Abstract: A filter has a filter medium (10) during operation clears fluid, particularly in the form of hydraulic fluid. The filter medium (10) is made of a material such that the potential difference to the fluid to be cleaned is low. The parts of the filter medium (10) have different potentials with respect to each other and/or the fluid to be cleaned such that they cancel each other at least partially, specific dissipation is aspired, or a return of electric charge to the associated filter medium (10) is provided, using a charge equalization situation.

Abstract: A filter device has a filter housing (1) receiving a filter element (11) defining a longitudinal axis and being in the form of a filter cartridge. An end cap (19) forms an enclosure for the relevant end rim of the filter material (23, 25). The end cap fixes the position of the filter element (11) in its functional position by being on an element receiver (13) that interacts with the bottom part (7) of the filter housing (1). The element receiver (13) and the assigned end cap (19) of the filter element (11), on their parts (17 and 15) coming into engagement with one another in the functional position of the filter element are provided with shaped irregularities matched to one another to enable the engagement in a positional relationship directed towards one another.

Abstract: A device (8) for a fuel filter system (10, 14) separates water from the fuel. The water takes on a property enhancing the separation by the device (8) by the action of a medium (42).

Abstract: A filter device purifies fluids, especially fuels contaminated with organic substances. Hydroxyl radicals are formed from water molecules contained in the fluids by a separating device (10, 14, 22). The hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible and convert them into compounds such as CO2.

Abstract: A system for ventilating and venting containers containing a fluid volume, such as gearboxes containing an oil filling, has a line system connecting the container to the atmosphere. Upon changes in the volumes in the container due to temperature changes, pressure is equalized. The line system contains a separating housing (12) in which a separating medium (46) having oleophobic and hydrophobic properties separates a first space (42) connected to the container from a second space (44) connected to the atmosphere. Line connections (10, 14) on the separating housing (12) are provided such that liquid-phase substances on opposite sides of the separating medium (46) can flow out of the first space (42) to the container and can drain out of the second space (44) to the atmosphere.

Abstract: A filter has first and second filter media (2, 3). The filter media define a flow space (4) between them receiving a device (5) for separation and flow guidance and dividing the flow space such that a functional space (25, 26) is disposed adjacent to the first or the second filter medium. The first filter medium (2) defines a hollow space (21) toward the outside, and the second filter medium (3) defines a hollow space (22) toward the inside. Each of the hollow spaces (21, 22) can be connected to at least one fluid duct (23, 24). The flow space (4) including the two functional spaces (25, 26) can be connected to at least one further fluid duct (27) that is separated in a fluid-tight manner from the other fluid ducts (23, 24).

Abstract: A hydraulic valve device has a valve housing (10) in which an activating piston (16) is guided in a movable manner. The activating piston (16) is actuatable by an actuating device (18) and activates a pilot valve (20) to connect a fluid port (T) in the valve housing (10) to a fluid chamber (22) of a shut-off piston (24). The shut-off piston (24) activates at least one fluid-conducting connecting line (1, 2) of the valve device and has a fluid conducting control line (26) opening from the connecting line (1, 2) into the fluid chamber (22) of the shut-off piston (24).

Abstract: The invention relates to a device for purifying water contaminated with organic substances, which is drained or collected from filters, especially fuel filters or elements of a fuel system. Hydroxyl radicals are formed from the water by means of a separating device where the hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible, and convert them into compounds such as CO2.

Abstract: The invention relates to a filter device having at least one filter element (11) comprising a filter medium (27) disposed between two receiving parts (31, 35) and a connecting device located at the lower receiving part (35) for a fluid connection to a fluid device, in particular to a fluid tank (1), having a connecting part (45) disposed on the connecting device, said connecting part being pretensioned by the action of a first energy store (43) for a motion away from the upper receiving part (31) into a closed position blocking the connecting device, having a further, second energy store (49) for generating a relative motion between the lower receiving part (35) and a closing-off part (17) of the device, and having a sealing device (55) sealing between the lower receiving part (35) and the closing-off part (17) as soon as said part and the lower receiving part (35) make contact with each other under the influence of the second energy store (49).

Abstract: A filter device, in particular a return line suction filter, has at least one filter housing (3) receiving a filter element (17) defining a longitudinal axis. The filter element has an end cap with an enclosure at one filter element end enclosing an end edge of the filter material (39) and fixed to an element receptacle (5) connected to the filter housing (3) for fixing the location of the filter element (17) in its functional position. The element receptacle (5) and the associated end cap (21) of the filter element (17) have design irregularities (63, 65) adapted to each other at their parts (23, 47) engaging each other in the functional position of the filter element (17). The irregularities enable the engagement in a positional alignment to each other.

Abstract: A filter has a filter medium (10) during operation clears fluid, particularly in the form of hydraulic fluid. The filter medium (10) is made of a material such that the potential difference to the fluid to be cleaned is low. The parts of the filter medium (10) have different potentials with respect to each other and/or the fluid to be cleaned such that they cancel each other at least partially, specific dissipation is aspired, or a return of electric charge to the associated filter medium (10) is provided, using a charge equalization situation.

Abstract: A filtering apparatus includes a pot-type filter housing (10), a filter element (28) accommodated in the housing, a holding mechanism (38) disposed in the filter housing (10) to removably fix the filter element along its longitudinal axis, and a sealing device (60) that seals between a lid (20) of the filter housing (10) and the filter element (28). The holding mechanism (38) is provided with cooperating holding elements embodied on the interior face of the filter housing (10) as well as on the filter element (28). The filtering apparatus dispenses with the need for O-seals that are known in prior art and extend in a radial direction between the filter element and the filter head as a housing lid because the sealing device (60) encompasses at least one sealing edge (62) or sealing surface placed parallel to the longitudinal axis in a radial direction and seals under the effect of the pressure applied it by the holding mechanism (38).