Abstract: A filter device for filtering liquids in internal combustion engines has a filter housing and a filter element inserted into the filter housing. A liquid to be filtered is introduced into the filter housing and flows through the filter element. An overflow valve is arranged between an entry side and a clean side of the filter element and has a valve body. The overflow valve is in an open position when a pressure of the liquid at the entry side of the filter element exceeds a threshold value. The valve body of the overflow valve is a sealing hose placed between the entry side and the clean side onto a cylindrical supporting body arranged in the filter housing. Flow openings are provided in the cylindrical supporting body. The sealing hose is arranged at the clean side of the supporting body.

Abstract: A liquid filter, in particular for the lubricating oil of an internal combustion engine, having a housing with an inlet and an outlet formed from a housing pot having a substantially downwardly open filter element installation opening and a screw-on cover that closes the installation opening, and a filter element arranged in the housing, sealingly separating the inlet from the outlet. The screw-on cover has a drain for residual liquid present in the housing with a round drain opening arranged in the central axis of the housing. A device for opening and closing the drain opening is arranged in the area of the drain and connected to an end disk of the filter element so that it moves relative to the drain opening and opens the drain when the cover is unscrewed.

Abstract: A liquid filter, in particular for the lubricating oil of an internal combustion engine, having a housing with an inlet and an outlet formed from a housing pot having a substantially downwardly open filter element installation opening and a screw-on cover that closes the installation opening, and a filter element arranged in the housing, sealingly separating the inlet from the outlet. The screw-on cover has a drain for residual liquid present in the housing with a round drain opening arranged in the central axis of the housing. A device for opening and closing the drain opening is arranged in the area of the drain and connected to an end disk of the filter element so that it moves relative to the drain opening and opens the drain when the cover is unscrewed.

Abstract: An apparatus for filtering a liquid, with a housing, a liquid inlet arranged in the housing, a liquid outlet arranged in the housing, a filter for removing particles from a liquid stream arranged between the liquid inlet and the liquid outlet, and at least one additive for functionally altering the liquid properties arranged in the apparatus, in which the additive is arranged in the interior volume of the apparatus and is shaped in a colloidally disperse, dimensionally stable, elastic form corresponding to at least one geometric space defined by an interior structure of the apparatus or of the filter for removing the particles.

Abstract: A liquid filter, in particular for internal combustion engines, having a filter housing with an essentially hollow cylindrical filter element arranged therein in a sealing manner to separate an unfiltered liquid side of the filter from a filtered liquid side. The filter element is supported on a connecting element having contours for forming a form-fitting connection through which the liquid filter is detachably and sealingly connectable to a counterpart. The counterpart may be a flange connected directly to a machine assembly, or it may be an adapter element for adapting the form-fitting connection to connect to a conventional threaded connector.

Abstract: A filter element (1) with a tubular folded bag (2) of folded filter material, which has a plurality of fold blades (3) adjacent each other in the longitudinal direction (10) of the folded bag (2) a closure cover (4) is attached at at least one axial end (7) of the folded bag (2). In order to provide a filter element which can be bent to any desired curved form while maintaining a high degree of filtration performance, and can be produced in a cost effective manner, the fold blades (3) of a folded bag (2) are provided with a combination of diagonal folds extending at an angle relative to each other such that the fold blades (3) in the longitudinal direction (10) of the folded bag extend back and forth and thereby form a three-dimensional crown structure (18). At least the outer margin of the closure cover (4) has a form corresponding to the crown structure (18) of the fold blades (3).

Abstract: A replaceable liquid filter, particularly for the lubricating oil of an internal combustion engine, including a substantially cup-shaped housing with a concentrically arranged outlet opening for filtered liquid and at least one inlet opening for the liquid to be filtered, and a filter element disposed in a sealing manner in the housing between the inlet opening and the outlet opening. The housing is connected to a top plate, and the top plate is connected to an end plate. The top plate encloses a displacement space which is disposed in an inlet chamber in the mating part, such that the inlet opening in the top plate is disposed in the region of the displacement space and/or a backflow check valve is disposed in the area of the outlet opening such that the backflow check valve is positioned axially outside the effective filter element surface.

Abstract: A replaceable liquid filter, particularly for the lubricating oil of an internal combustion engine, having a substantially cup-shaped housing with a concentrically disposed outlet opening for the filtered liquid and at least one inlet opening for the liquid to be filtered and a filter element sealingly disposed between the inlet opening and the outlet opening. The housing is connected to a top plate, and the top plate is connected to an end plate. A connector for releasably coupling the replaceable liquid filter to a mating part is disposed concentrically in the region of the cover plate, such that the connector extends axially beyond the contour of the replaceable liquid filter.

Abstract: A liquid filter, in particular for the lubricating oil of an internal combustion engine, having a housing with an inlet and an outlet formed from a housing pot having a substantially downwardly open filter element installation opening and a screw-on cover that closes the installation opening, and a filter element arranged in the housing, sealingly separating the inlet from the outlet. The screw-on cover has a drain for residual liquid present in the housing with a round drain opening arranged in the central axis of the housing. A device for opening and closing the drain opening is arranged in the area of the drain and connected to an end disk of the filter element so that it moves relative to the drain opening and opens the drain when the cover is unscrewed.

Abstract: A liquid filter, in particular for internal combustion engines, having a filter housing with an essentially hollow cylindrical filter element arranged therein in a sealing manner to separate an unfiltered liquid side of the filter from a filtered liquid side. The filter element is supported on a connecting element having contours for forming a form-fitting connection through which the liquid filter is detachably and sealingly connectable to a counterpart. The counterpart may be a flange connected directly to a machine assembly, or it may be an adapter element for adapting the form-fitting connection to connect to a conventional threaded connector.

Abstract: An apparatus for filtering a liquid, with a housing, a liquid inlet arranged in the housing, a liquid outlet arranged in the housing, a filter for removing particles from a liquid stream arranged between the liquid inlet and the liquid outlet, and at least one additive for functionally altering the liquid properties arranged in the apparatus, in which the additive is arranged in the interior volume of the apparatus and is shaped in a colloidally disperse, dimensionally stable, elastic form corresponding to at least one geometric space defined by an interior structure of the apparatus or of the filter for removing the particles.

Abstract: A drying agent box 10 which serves to remove moisture from air, especially for a compressed-air brake apparatus, and which comprises a housing 11 with at least one inlet 14 and at least one outlet 15, the housing 11 being formed by a container 12 and a flange 13. A drying agent body 18, which has a stable shape, is contained in the housing 11. Channels 22 may optionally be provided in the drying agent body for guiding the flow of air through the body. Different ways of installing the drying agent body 18 in the housing 11 also are described. Due to the stable shape of the drying agent body 18, the structure of the drying agent box is simplified because there is no need for components to hold a granular drying agent in place.

Abstract: A gas conducting system, particularly a compressed air system for a motor vehicle, which includes a filter containing a desiccant for removing moisture from a gas passed therethrough. The housing structure of the filter is provided with a seal with a weakened area 18, which specifically causes any overpressure to be reduced through failure of the weakened area if the pressure inside exceeds a permissible maximum. This process can be repeated multiple times until the seal with the weakened area 18 must be replaced due to aging. The weakened area can be used as a substitute for a pressure relief valve or as supplemental protection in case the pressure control valve fails, e.g., due to ice. This can prevent, for instance, bursting of the filter housing which could present a safety risk.

Abstract: A method and apparatus for cleaning candles in a candle filter using a cleaning fluid that flows inside the candle from the side of the filtrate, whereby said fluid is pressed in an opposite direction to the direction of the filtrate from the inside to the outside, through said candles, by a gaseous medium subjected to an overpressure. Water is or can be used as an appropriate cleaning fluid and air is used as a gaseous medium. The prior art teaches nozzle-shaped contractions that are respectively disposed on the outlet end of the candles or deflectors arranged inside the candle at a distance from said contractions, whereby the in-flowing cleaning fluid is deflected towards all sides in the direction of the inner walls of the candles, are provided for distribution of said cleaning fluid.

Abstract: A filter member for horizontal disc filters has a base plate having a peripheral edge and a hub connected to the base plate. The base plate has cavities extending in a radial direction of the base plate at a slant toward the hub, wherein the cavities are positioned closely adjacent to one another. The base plate has narrow projections formed between the cavities. A filter medium, providing a support for deposition filtration and cake-forming filtration, is formed as a thin filter plate with very small openings. The hub, the projections between the cavities, and the peripheral edge have support surfaces for supporting the filter plate. The filter plate is at least partially connected to these support surfaces by material bonding such as welding.

Abstract: A method of operating a plant for filling containers by moving a liquid such as water through an apparatus with at least one portion for receiving the liquid before it is filtered and at least one portion for receiving the liquid after it is filtered, so that the liquid moves from at least an upper area of apparatus to lower area of the apparatus to be transferred to bottles or other containers.

Abstract: A gas conducting system, particularly a compressed air system for a motor vehicle, which includes a filter containing a desiccant for removing moisture from a gas passed therethrough. The housing structure of the filter is provided with a seal with a weakened area 18, which specifically causes any overpressure to be reduced through failure of the weakened area if the pressure inside exceeds a permissible maximum. This process can be repeated multiple times until the seal with the weakened area 18 must be replaced due to aging. The weakened area can be used as a substitute for a pressure relief valve or as supplemental protection in case the pressure control valve fails, e.g., due to ice. This can prevent, for instance, bursting of the filter housing which could present a safety risk.

Abstract: A filter medium for solid/liquid separation has a sheet of a metallic material or plastic. The sheet has a plurality of openings. The openings are slots having a slot width and are produced by drawing a drawn grid structure and subsequently mechanically plastically reverse-deforming the drawn grid structure.