Abstract: A filter device having a filter head (10) and a filter bowl (12) for mounting a replaceable filter element (14), characterized in that a compensation device (16) is provided, which acts between the filter head (10) and the filter element (14), which is a component of the filter element (14) and which has a gimbal bearing (50) for establishing a fluid-conveying connection with the filter head (10).

Abstract: A filter device for the filtration of fluids, at least consisting of a filter housing (10), which can be closed by means of a cover (40), and a filter element (30) accommodated in a replaceable manner in the filter housing (10), is characterized in that at least one functional element is present on the cover (40) and on the filter housing (10) and on the filter element (30) in such a way that the filtration of the fluid is only possible when all functional elements interact simultaneously.

Abstract: A filter device having a filter housing (2) and a filter element (15) accommodated therein, the element material (44) of which for filtering a liquid extends between two end caps (40, 42), at least one end cap (40) of which is mounted on an element receptacle (14), wherein a bearing (46, 54), providing more than one degree of freedom, is used to articulate the filter element (15) on the element receptacle (14) via its one end cap (40), characterized in that the bearing has a convex bearing surface (46) that is guided in a concave bearing surface (54) and in that the respective bearing surface (46, 54) is part of a shell (55a, 55b), at least one (55b) of which has a passage (55c) for liquid media.

Abstract: A filter element for fluid filtration, in particular for hydraulic fluid, has element components, such as pleated and multi-layer filter material (10) that extends between two end caps (26) and has a fluid-permeable supporting tube (14) forming a hollow cylinder. At least one element component of the filter element is provided at least partially with at least one luminescent material or marker such that the material or marker is excited to a characteristic, detectable wave emission when exposed to a certain exciter wave or wave spectrum.

Abstract: A filter device has a filter housing (1) with a filter head (3), a filter pot (7) and a removable housing cover part (51) and has a filter element (13) separating a non-filtrate side (15) from a filtrate side (17) in the housing. A bypass valve device has a valve closure element (65) preloaded by a closing spring (69) into a closed position in which it bears against a valve seat part (74). If the filter element (13) is blocked, the closure element opens up a fluid path from the non-filtrate side (15) to the filtrate side (17), by passing the filter element (13). The valve closure element (65) and the closing spring (69) are on the cover part (51). The valve seat part (74) is on an element cap (43) of the filter element (13). The element cap has a receiving part (45) forming an enclosure for that end of the filter material (27) of the filter element (13) facing toward the cover part (51).

Abstract: A filter apparatus includes a filter housing having a filter head (3) and a filter bowl (7). The housing accommodates a filter element that separates a non-filtrate side (15) from a filtrate side (17). A differential pressure measurement device (59) indicates at least a blockage of the filter element during filtration operation and has a measurement piston (91) that is guided in a measurement housing (88) in a longitudinally displaceable manner. An end face (90) of that piston is subjected to the instantaneous pressure of the non-filtrate side (15). The opposite end face of the piston is subjected to the instantaneous pressure of the filtrate side (17). Each instantaneous pressure passes into the measurement housing (88) via at least one conduit (57, 61, 65, 89). At least a section (57, 61) of the conduit is arranged in an element cap (43) of the filter element.

Abstract: An assembly forms a seal between components (11, 33) having sealing zones (37,51). The sealing zones face each other in a functional position of the components. A sealing element (43, 57) is on the sealing zone (37, 51) of one component (11, 33). A sealing surface (51) is on the sealing zone (37, 51) of the other component (11, 33) to form a radial seal. The components (11, 33) can be brought into the functional position by a relative movement in the axial direction. The sealing element (43, 57) sealingly interacts with the sealing surface (51) in the functional position. A third component (61) associated with an actuating part (62) acts on the sealing element (43;57) in the functional position of the components (11, 33) to deform the element to increase the sealing force.

Abstract: A filter device, having a filter housing (1) which has a filter head (3), a filter pot (7) and a removable housing cover part (51) and which accommodates a filter element (13) which separates a non-filtrate side (15) from a filtrate side (17), and having a bypass valve device which has a valve closure element (65) which is preloaded by means of a closing spring (69) into a closed position in which it bears against a valve seat part (74) and which, if the filter element (13) is blocked, passes into a position in which it opens up a fluid path from the non-filtrate side (15) to the filtrate side (17), by passing the filter element (13), is distinguished by the fact that the valve closure element (65) and the closing spring (69) are arranged on the cover part (51) and the valve seat part (74) is situated on an element cap (43) of the filter element (13), which element cap has a receiving part (45) which forms an enclosure for that end of the filter material (27) of the filter element (13) which faces toward the

Abstract: Disclosed is a filter apparatus comprising a filter housing having a filter head (3) and a filter bowl (7), which housing accommodates a filter element that separates a non-filtrate side (15) from a filtrate side (17), and comprising a differential pressure measurement device (59), which indicates at least a blockage of the filter element during filtration operation and which has a measurement piston (91) that is guided in a measurement housing (88) in a longitudinally displaceable manner, an end face (90) of which piston being subjected to the instantaneous pressure of the non-filtrate side (15), and the opposite end face of the piston being subjected to the instantaneous pressure of the filtrate side (17), each instantaneous pressure passing into the measurement housing (88) via at least one conduit (57, 61, 65, 89). The invention is characterised in that at least a section (57, 61) of the conduit is arranged in an element cap (43) of the filter element.

Abstract: The invention relates to a filter element for fluid filtration, in particular for hydraulic fluid, consisting of element components, such as a preferably pleated and multi-layer filter material (10) that extends between two end caps (26) and at least partially comprises a fluid-permeable supporting tube (14) forming a hollow cylinder, characterized in that at least one element component of the filter element is provided at least partially with at least one luminescent material or another marker in such a manner that said material or marker is excited to a characteristic, detectable wave emission when exposed to a certain exciter wave or wave spectrum.

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: The invention relates to an assembly for forming a seal between components (11, 33), which have sealing zones (37,51), said sealing zones facing each other in a functional position of the components. A sealing element (43, 57) is provided on the sealing zone (37, 51) of one component (11, 33) and a sealing surface (51) is provided on the sealing zone (37, 51) of the other component (11, 33) in order to form a radial seal, and the components (11, 33) can be brought into the functional position by a relative movement which is carried out in the axial direction, said sealing element (43, 57) sealingly interacting with the sealing surface (51) in said functional position. The invention is characterized in that the assembly has a third component (61) which is associated with an actuating part (62) that acts on the sealing element (43;57) in the functional position of the components (11, 33) so as to deform said element in order increase the sealing force.

Abstract: A system for ventilating and venting containers containing a fluid volume, such as gearboxes containing an oil filling, with a line system which connects the container concerned to the atmosphere and, upon changes in the volumes located in the container due to temperature changes, permits pressure equalization, is characterized in that the line system contains a separating housing (12) in which a separating medium (46) having oleophobic and hydrophobic properties separates a first space (42), which is connected to the container, from a second space (44), which is connected to the atmosphere, and in that line connections (10, 14) to the separating housing (12) are laid in such a manner that liquid-phase substances deposited on the separating medium (46) can flow out of the first space (42) to the container and out of the second space (44) to the atmosphere.

Abstract: A filter device includes at least one filter element (10) housed in a filter housing (22) and connected for the flow of fluid by fluid connections (30, 36) to a fluid device, in particular in the form of a hydraulic tank (40), using a connector device (44). A plunger valve arrangement is achieved, whereby the connector device (44) is provided with at least one longitudinally-displaceable blocking piece (46). In the blocking position, the blocking piece blocks the provided fluid connections (30, 36). After displacement into an open position, it releases the fluid connections. A blocking or releasing of the fluid connections in a rapid operation process is permitted to carry out a filter element exchange for the used filter medium.

Abstract: A non-return valve includes a valve body (1) which defines an internal fluid through-opening (7) extending along the longitudinal axis (5) of the body. A seat body (17) defines a valve seat (31) arranged in the through opening (7). A closing body (35) is axially displaceable in the through opening (7) oppositely to a closing force produced by a closing spring (45) between a closed position applied to the seat body (17) and an open position lifted from the valve seat (31) on the closing body (35). The valve body (1) forms a guide along which the seat body (17) is axially displaceable in different adjusting positions corresponding to the desired preloads of the closing spring (45) and, consequently to the desired adjustments of the closing force quantity of the closing spring (45).

Abstract: A filter device includes at least one filtering element arrangeable in a filter housing (11) connectable to a hydraulic device (9), in particular a hydraulic tank. The tank is connectable to the filter housing through hydraulic connections (37, 39) by a connection system in such a way that a fluid is enabled to circulate. The filter housing is removably mounted on the hydraulic device (9) by a fixing unit. The fixing unit is embodied in the form of a bayonet fitting (17, 19) which is lockable and detachable by the filter housing (11) rotation. The connection system has at least one movable locking element which locks in the locking position the hydraulic connection (37, 39) associated with it, and releases the connection after displacement in the open position. The locking element is displaceable in a sealing or opening position by rotational motions of the housing (11) for detaching and locking the bayonet fitting (17, 19).

Abstract: A filter device has a filter housing part (10) with a filter element (12) and can be detachably connected to another filter housing part (20). A valve (24) clears a fluid path in the interconnected state of the housing parts (10, 20) with the filter element, and in the separated state of the housing parts (10, 20) from one another or without the filter element at least partially blocks it. Instead of known quarter-turn fastener and stopper solutions, a blocking is devised which can be economically implemented and which requires decidedly less installation space. A process for operation of a filter device is also provided.

Abstract: The invention relates to a filter device having a filter housing part (10) which comprises a filter element (12) and which can be detachably connected to the other filter housing part (20). Because there is a valve means (24) which clears a fluid path in the interconnected state of the housing parts (10, 20) and in the separated state of the housing parts (10, 20) from one another at least partially blocks it, instead of known quarter-turn fastener and stopper solutions a blocking means is devised which can be economically implemented and which requires decidedly less installation space. The invention relates also to a process for operation of a filter device.

Abstract: The inventive filter device comprises at least one filtering element arrangeable in the filter housing (11) which is connectable to a hydraulic device (9), in particular a hydraulic tank through hydraulic connections (37, 39) by means of a connection system in such a way that a fluid is enabled to circulate and is removably mounted on said hydraulic device (9) by means of a fixing unit. The invention is characterised in that said fixing unit is embodied in the form of a bayonet fitting (17, 19) which is lockable and detachable by the filter housing (11) rotation, the connection system comprises at least one movable locking element which locks in the locking position the hydraulic connection (37, 39?) associated therewith and releases said connection after displacement in the open position and said locking element is displaceable in a sealing or opening position by rotational motions of the housing (11) for detaching and locking the bayonet fitting (17, 19).

Abstract: The inventive non-return valve comprises a valve body (1) which defines an internal fluid through-opening (7) extending along the longitudinal axis (5) of the body, comprising a seat body (17) defining a valve seat (31) arranged in said through opening (7) and a closing body (35) which is axially displaceable in the through opening (7) oppositely to a closing force produced by a closing spring (45) between a closed position applied to the seat body (17) and an open position lifted from the valve seat (31) on the closing body (35), wherein the valve body (1) forms a guide along which the seat body (17) is axially displaceable in different adjusting positions corresponding to the desired preloads of the closing spring (45) and, consequently to the desired adjustments of the closing force quantity of said closing spring (45).