Abstract: A valve, especially a gas safety valve includes a fluid-guiding path (32) that can be sealed by a sealing device (30) provided with a sealing surface (34). The sealing surface can be brought against an abutment surface (36) of an abutment part (38), and is at least partially inserted into a receiving region (40) of a receiving part (42). As the sealing device (30) is fixed inside the receiving region (40) in such a way that a counter-holding part (54) can be brought into contact with the sealing device (30) by connection to the receiving part (42), the sealing device is arranged inside the receiving region of the receiving part and is securely held in the receiving region.

Abstract: A piston-type accumulator includes an accumulator housing provided in the form of a cylinder tube (1). A separating piston (15) separates two working spaces (5) and (6) from one another in the housing and can be displaced in an axial direction within a piston stroke area (19) of the cylinder tube (1). The cylindrical tube is closed at one axial end by a closure part (7). The closure part is defined by deforming a deforming area (9) of the wall of the cylinder tube (1). The deforming area adjoining the piston stroke area (19) is provided in the form of part that exists as a single piece with the housing. A stop body (25), which limits the movement of the separating piston (15) before reaching the deforming area (9), is provided inside the cylinder tube (1) at the location where the piston stroke area (19) transitions into the deforming area (9).

Abstract: A filter element (8), especially for use in backwash filtering systems, includes a filtering element through which a contaminated fluid flows in at least one direction (24). An intercepting device (62) has at least one rod-shaped permanent magnet or electromagnet (64) that at least partially removes magnetizable, especially ferritic portions from the fluid, before the fluid flows through the filtering element. A detaching device (68) removes the magnetizable portions from the intercepting device (62). The detaching device (68) is configured by a stripper ring (70) that travels along the rod-shaped magnet (64) and removes the portions retained by the intercepting device (62). When the filtering element is backwashed, the stripper ring (70), moved by the fluid flow, detaches the portions retained by the intercepting device (62).

Abstract: A hydraulic accumulator includes a piston (3) capable of moving in an accumulator housing (1) in its axial direction and separating a gas side (5) from a liquid side (7) of the accumulator housing (1). Guide elements (9, 17) designed to co-operate with the accumulator housing wall (1), as well as at least one sealing element (15), are arranged at the periphery of the piston. The sealing element is arranged offset in the axial direction relative to the guide elements (9, 17), and is located between the guide elements. In the piston (3), a pressure compensating channel (19) forms, at the piston periphery, a liquid flow path between the liquid side (7) and a space (2) located between the guide element (17) nearest to the liquid side (7) and the sealing element immediately next in the axial direction. A device (25) reducing the cross-section of the passage of the pressure compensating channel (19) is located in it.

Abstract: A device for damping pressure surges in a fluid with a housing (10) and a piston (14) that can be longitudinally displaced inside the housing (10) against the pretensioning force of a spring energy store (12). The piston (14) interacts with another piston (24), which is guided in a connecting piece (26) of the housing (10) in a manner that enables it to be longitudinally displaced. During the operation of the device, the piston (14) exerts a pressure force onto the other piston (24) when the other piston is in any displacement position. Even pressure surges occurring with a high frequency can be reliably controlled in a functionally reliable manner.

Abstract: A hydraulic accumulator includes an accumulator housing (1) formed of a non-magnetizable material and defining an axial direction of the housing. A separating element (9) can be axially displaced in the accumulator housing (1) and separates two working chambers (5, 7) from each other in the accumulator housing (1). A field-generating magnetic configuration (29) is arranged on the separating element. A series of magnetic field sensors (35) are arranged on the outer side of the accumulator housing (1), extend along the path of the axial movement of the separating element (9) and react to the field of the magnetic configuration (29) on the separating element (9) to characterize its position along the series of magnetic field sensors (35).

Abstract: A device damps water hammers in hydraulic accumulators, in particular in piston accumulators. The device is embodied in the form of the accumulator component which operates as a throttle on a fluid flow and is inserted between internal elements (12) of the accumulator and a hydraulic network (14) to which the accumulator is connectable. The throttle is formed by at least one transfer area (24) having a predetermined cross-section in a valve element (16) which interrupts the fluid flow up to the transfer area (24) at one of the valve positions and releases it at its other position. The transfer area (24) has at least one free end with a funnel-shaped enlargement (26,28) oriented towards the inside of the accumulator (12) or towards the hydraulic network (14), thereby substantially improving damping such that noise emission is reduced to the greatest possible extent.

Abstract: A control device, in particular for working machines, such as wheel loaders, excavators or similar devices, includes at least one working tool (12), particularly a working shovel that can be actuated by at least one hydraulic working cylinder (10). The device has a control block for controlling the hydraulic fluid paths between the working cylinder (10), a hydraulic fluid supply (P) and a tank (T). The device also has at least one hydraulic accumulator (22) and a shut-off or stop valve (32). The shut-off valve has a controllable valve member (34) and is located between the working cylinder (10) and the accumulator (22). The valve member is connected in the transmission position for connecting the accumulator (22) in order to damp the motion of the working cylinder (10). A selector valve (26) that can be controlled by the control block (20) is connected in the feed line (24), blocking the line (24) in the non-actuated state.

Abstract: A suspension system, in particular for a working machine, such as a tractor or similar device, with a suspension cylinder (10) is subjected to various load pressures (m). The piston slide (12) and rod side (14) of the system may each be connected to a suspension reservoir (16, 18). A locking device (20) locks the suspension and, with an equalization device (28) having a switching valve (48) within the supply device, controls the piston side (12) of the suspension cylinder (10). A pressure supply (P) supplies the system pressure necessary for the suspension system. A pressure equalization of the system to the relevant load pressure can be performed before renewed operation by the equalization device. The equalization device (28) includes a further switching valve (50) within the supply device (30) for control of the rod side (14) of the suspension cylinder (10). A load monitoring device (LS) is connected to parts of the stop device (20).

Abstract: A hydraulic accumulator, particularly a piston-type accumulator, includes an accumulator housing (1) which defines a longitudinal axis (9), is provided with an opening that is concentric with the longitudinal axis (9) and is closed by means of a lid (11). The lid is secured in a form-fitting manner against axial forces by a wall portion (25) of the accumulator housing (1). The housing encompasses the lid and is radially deformed towards the inside. The hydraulic accumulator also includes at least one part (39) that is deformed perpendicular to the longitudinal axis (9) secure the lid (11) in a form-fitting manner against being twisted relative to the longitudinal axis (9).

Abstract: A hydroaccumulator, in particular a bladder accumulator, includes a pressurized container (1) and a separation element (5) located in the container to separate a gas chamber (7) lying adjacent to an inlet on the gas side from a fluid chamber (9) lying adjacent to an inlet on the fluid side inlet (3), having a fluid connecting sleeve (11) and a valve arrangement located in the connecting sleeve (11). The valve body (17) has a transversal bore (33). The valve body is pretensioned in an open position which allows the passage of fluid and can be displaced into a closed position by a displacement of the separation element (5). The interior surface (15) of the connecting sleeve (11) lies directly against the valve body (17) and guides the displacement of the body between the open and closed positions. The side of the valve body (17?) that faces the separation element (5) is configured as a planar plate extending partially into the fluid chamber (9).

Abstract: Disclosed is a hydraulic accumulator, particularly a piston-type accumulator, comprising an accumulator housing (1) which defines a longitudinal axis (9) and is provided with an opening that is concentric with the longitudinal axis (9) and is closed by means of a lid (11). Said lid is secured in a form-fitting manner against axial forces by means of a wall portion (25) of the accumulator housing (1), which encompasses the lid and is radially deformed towards the inside. The inventive hydraulic accumulator also comprises at least one part (39) that is deformed perpendicular to the longitudinal axis (9) so as to secure the lid (11) in a form-fitting manner against being twisted relative to the longitudinal axis (9).

Abstract: A piston-type accumulator includes a separating piston (13) displaced axially within a piston housing (1). The piston separates a fluid side (15) of the accumulator from its gas side (23), and has comprises two sealing areas (17, 25) offset relative to each other in the axial direction. The sealing areas are arranged on the circumference of the piston and are displaced along the inner wall surface of the accumulator housing. The accumulator housing (1) is provided with a ventilation device (31) between the sealing areas (17, 25) for discharging leakage passing through the sealing areas (17, 25).

Abstract: A hydraulic accumulator includes an accumulator housing (1) and a diaphragm (3) forming a displaceable partition element in the housing between a gas chamber (7) and a liquid chamber (5). The membrane has several annular regions (31, 33, 35, 37, 39), interconnected by annular weak points (61, 63, 65, 67, 69, 71). The annular regions (31, 33, 35, 37, 39), have protuberances (81, 83, 85, 87, 89) on the interior face of the membrane (3) facing away from the wall of the accumulator housing (1). The protuberances are at their thickest in the central region between adjacent weak points, thus increasing the wall thickness of the membrane (3), and are at least partially convex (91,93), tapering off to a respective flat form towards the weak points.

Abstract: A hydraulic accumulator, especially a bladder accumulator, includes an accumulator housing (10), and a separation element disposed in and separating the accumulator housing interior into a gas chamber (16) adjoining an inlet (14) on the gas side from a fluid chamber (18) adjoining an inlet (20) on the fluid side. The inlet on the fluid side has a fluid connecting neck (22) having a valve support (40) disposed in the neck. The valve support has fluid openings (42), and a disk-shaped valve body (32) that tapers towards the valve shaft (46) on its side facing the valve support (40). The valve shaft can be pretensioned via a force accumulator (62) into the open position releasing the fluid opening, can be displaced into its closed position by a displacement of the separation element (12), and projects into the fluid chamber (18) in the open position.

Abstract: A hydroaccumulator, especially a membrane accumulator, has an accumulator housing with two housing parts and a separating element in the housing. The separating element can be a separating membrane dividing the accumulator housing into a gas chamber and a fluid chamber. The gas chamber is connected to carry gas to and from gas refiller through a connection. The gas refiller is formed from an additional housing part connected to the accumulator housing to form a unit. The connection is at least one connecting opening in the accumulator housing connecting the interior of the additional housing part to the gas chamber. Additional gas accumulator volume is provided without otherwise conventional pipework to save money and installation space and avoid conventional leaks which occur in the area of the pipework.

Abstract: A hydraulic accumulator, especially a piston accumulator, includes an accumulator housing (10) with at least one gas chamber (12) and a fluid chamber (14). These chambers are separated from each other by a separating element (16). At least one of these chambers (12, 14) can be filled with a pressure medium or at least partially emptied through at least one valve control unit (26) which has switching valves (28, 30). One switching valve (28) is accommodated in a corresponding valve location (29), and can be moved in the direction of movement of the separating element (16) from an opening position into closing position and vice-versa. Expensive line network between the hydraulic accumulator and the valve control unit is avoided. Sealing or leakage problems, such as are common in a line network, never occur. The valve control unit (26) is accommodated in a valve block (24) which is independent from the housing (10).

Abstract: A hydropneumatic pressure reservoir (1) forms a housing from at least two housing shells (3, 5) connected together. At least the end region of the one housing shell (5) includes an outwardly-extending, funnel-like guide surface between its free end and a sealing element for bringing together the two housing shells (3, 5). At least on elastic sealing element (41) is provided on at least one retaining surface for generation of a tensioning force on the boundary region (21) of the membrane (13). A simplified construction with improved sealing in the critical connection of the pressure reservoir is achieved.

Abstract: A hydropneumatic pressure accumulator has an outer tube forming the accumulator housing. A flexible separating element is formed by a section of a hose, extends in the longitudinal direction inside of the outer tube and is anchored on the tube to form a seal. On the outside and inside of the hose, receiving spaces separated from one another are formed within the tube. A support body is surrounded by the hose and has fluid passages. At least in sections, the support body cross sectional shape is not round. The hose is closed on its one end and is anchored only on its other open end together with an adjacent end of the support body along the outer tube. The size of the outside surface of the hose is only slightly smaller than the size of the inside surface of the outer tube facing it. The size of the outside surface of the support body is slightly smaller than that of the inside surface of the hose facing it.

Abstract: A method monitors the gas prefill pressure in hydraulic accumulators. After the pressure supply to the oil side of the accumulator has been interrupted and the contents of the tank have been emptied, the current gas temperature and the current gas pressure are determined, once the temperature has equalized. The data relating to the gas temperature and pressure is telemetrically transmitted to an evaluation unit, which is spatially located at a distance, to calculate an actual value of the gas prefill pressure which corresponds to a reference temperature.