Abstract: The disclosure relates to a device, in particular for volume compensation in fluid circuits, at least consisting of a device housing and a compensating element which is movably guided therein, that can be acted on by a fluid pressure and is supported on an energy storage device, wherein the device housing has at least two housing parts, which are arranged one behind the other when viewed along the longitudinal axis of the device housing, wherein the adjacent housing parts differ in their free cross-sectional areas, and wherein the transition from one housing part to the subsequent, adjacent housing part is in the form of a step.

Abstract: The disclosure relates to a hydraulic accumulator, in particular a diaphragm accumulator, comprising an accumulator housing and a separating element which is arranged therein and separates two media chambers from each other. The accumulator housing has at least one fluid connection point which opens into an adjacent media chamber and has a connection body with a fluid passage point that is connected to the accumulator housing via a welding seam. The connection body has an annular outer circumferential surface on the connection region facing the accumulator housing, and when the end face of the connection body is placed on the accumulator housing, the connection body forms a transition point, along which the welding seam runs.

Abstract: The disclosure relates to a drive device with an electro-hydraulic drive and a hydraulic auxiliary system which generates an auxiliary torque which, if necessary, counteracts a main torque of the electro-hydraulic drive.

Abstract: The disclosure relates to a method for producing at least one part of a hydraulic accumulator, comprising at least the following: providing an accumulator housing part that has at least one fluid connection point, providing a connection element with a fluid passage that has a material agglomeration on its one free end face, placing the material agglomeration against the accumulator housing part such that the fluid connection in the accumulator housing part comes into fluidic connection with the fluid passage of the connection element, melting the material agglomeration by means of a welding method, joining the connection element and accumulator housing part under a predefinable pressing force and a predefinable path and allowing the resulting weld connection to cool.

Abstract: Disclosed is a conveying device for fluids with an inlet and an outlet and a conveying part which is connected therebetween and can be actuated by a drive part, wherein the conveying part has a fluid-tight media-separating device with a variable chamber volume, which becomes connected in a fluid-conducting manner via its receiving chamber to the inlet or the outlet, and which, by means of the drive part, receives fluid via the inlet as part of an intake stroke, increasing the chamber volume, and discharges the received fluid via the outlet as part of a discharge stroke, reducing the size of said chamber volume.

Abstract: Separator and hydraulic accumulator having such a separator. A separator, in particular for a hydraulic accumulator, such as a bellows accumulator, which is produced by a 3D printing process, consisting of one single diaphragm, which, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on the outside and the inside, and in that, to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, the notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle with each other, at least in an initial state, wherein the individual diaphragm surface between deflection points, which are located in opposite radially inner and outer wall areas of the diaphragm, has a course that undulates axially.

Abstract: A safety device is disclosed, consisting of a screw body with a screw head, which is connected to the screw body in one piece and forms a rotary-drive part, and with a thread, which is connected to the screw head in one piece and forms a securing part, and also with a rupture device, which is arranged in a channel of the screw body, wherein a sight glass is accommodated entirely within the channel of the screw body, together with the rupture device, and forms an inspecting device for assessing the state of the rupture device.

Abstract: Disclosed is a bellows accumulator in which a folding bellows, which serves as a movable separating element between a first media side and a second media side, has at its bellows end, a closure body which media-tightly closes of the interior of the folding bellows and, at its other bellows end, is immovably fixed relative to a storage housing. The accumulator has a valve device which, when the pressure on a liquid side drops, moves to a closed position, thereby preventing liquid from continuing to flow out of the storage housing. The closing process for the valve device is controlled using an energy store, which is arranged between the valve device and the closure body of the folding bellows in such a way that a specifiable quantity of liquid remains in the storage housing in any case, the quantity of liquid supporting the folding bellows in an expanded position.

Abstract: Separator and hydraulic accumulator having such a separator. A separator, in particular for a hydraulic accumulator, such as a bellows accumulator, which is produced by a 3D printing process, consisting of one single diaphragm, which, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on the outside and the inside, and in that, to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, the notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle with each other, at least in an initial state.

Abstract: The disclosure relates to a hydraulic accumulator, in particular in the form of a piston-type accumulator, having a separating element which is arranged in an accumulator housing and fluid-tightly separates two fluid chambers, in particular a closed accumulator chamber comprising a working gas and a liquid chamber comprising an operating liquid such as hydraulic oil, from one another, wherein a fluid port is fluidically connected to one of the fluid chambers. The hydraulic accumulator is characterised in that the fluid port has a magnetic-field-generating device which is received in a fixed position in the fluid port and separates magnetizable particles out of the fluid passing through the fluid port, to purify said fluid.

Abstract: The invention relates to a hydraulic accumulator, in particular in the form of a piston accumulator, comprising a separation element (10), which is arranged in an accumulator housing (14) and separates two fluid chambers (16, 18) in a fluid-tight manner, in particular a closed-off storage chamber (20) containing a working gas, from a liquid chamber (22) containing an operating liquid, such as hydraulic oil, a fluid connection (24) being connected in a fluid-conducting manner to one of the fluid chambers (18), characterised in that a magnetic-field-generating device (42) is received in a part of the accumulator housing (14) which comprises the fluid connection (24), in such a way that magnetisable particles can be separated, in a cleaning manner, from the fluid located between the part of the storage housing (14) and the separation element (10) and deposited in the direction of the magnetic-field-generating device (42), on the latter.

Abstract: Disclosed is an expansion device having an expansion housing, which has a separating membrane, which separates the expansion housing into two media chambers, of which one media chamber can be filed with liquid via a liquid connection in the expansion housing, characterised in that the other media chamber is permanently connected to the environment via at least one opening in the expansion housing, even during operation of the device, in such a way that ambient pressure prevails in the other media chamber.

Abstract: The disclosure relates to a piston accumulator comprising an accumulator housing and a separator piston which is longitudinally moveably arranged therein and separates two media chambers from one another within the accumulator housing, wherein the accumulator housing is elastically formed in a sandwich-type structure from individual, partially differing layers in such a way that, with the influence of at least one external force, it allows for a curvature as a whole, starting from a starting state, and it returns to the starting state with the removal of the respective force.

Abstract: The disclosure relates to a piston accumulator having an accumulator housing in which a separating piston is longitudinally movably guided which separates two fluid chambers, in particular separates a fluid chamber having a working gas from a further fluid chamber having an operating fluid, such as hydraulic oil, and which separating piston has a damping device, wherein, in addition to the damping device, an inflow device is provided which interacts with the damping device for damping a fluid flow out of the accumulator housing by forming a throttle along a fluid path and which releases a further fluid path by bypassing the other fluid path that has the throttle in order for fluid to flow into the accumulator housing.

Abstract: The disclosure relates to a piston accumulator comprising an accumulator housing and a separator piston which is longitudinally moveably guided therein and separates two media chambers from one another inside the accumulator housing, in particular separating a media chamber with a working gas from another media chamber with a fluid, such as hydraulic oil, wherein the separator piston has two piston parts which are formed as discs with the same outer diameter and which are securely connected to one another and held at a distance from one another via an elastically flexible piston rod, which, with the influence of at least one external force, allows for a curvature as a whole, starting from a starting state, and returns to the starting state with the removal of the respective force.

Abstract: The disclosure relates to an hydraulic accumulator, in particular a diaphragm accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein a weld seam is formed by a laser or electron beam welding process without any filler materials, in that at least a part of the wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards the surroundings, in a manner that is free of protrusions with respect to an outer circumferential surface of a connection element.

Abstract: The disclosure relates to a hydraulic accumulator comprising an accumulator housing and a separating element which is arranged therein in a longitudinally movable manner and which separates two media chambers within the accumulator housing, in particular a chamber with a working gas, such as nitrogen gas, from another chamber with a liquid, such as hydraulic oil, and a bursting device for reducing an inadmissibly high pressure in the accumulator housing, wherein the bursting device is arranged in the separating element, and when the bursting device bursts, a media-conducting connection between the two media chambers is released via the separating element.

Abstract: Pressure accumulator with an accumulator housing (10), in which a movable separating element (16) separates a medium space (12), preferably filled with a working gas, from a fluid space (14) in a fluid-tight manner, wherein a monitoring device (28) is provided and gives a visually perceptible indication when there is a fault that impairs the sealing effect of the separating element (16), the monitoring device having a viewing window through which it is possible to observe an indicator which is in connection with the medium space (12) and the optical property of which perceptibly changes when it is wetted with the fluid, characterized in that the monitoring device (28) has a screw plug, which can be screwed with its external thread into an assigned internal thread of the accumulator housing (10) and which has the viewing window and the indicator and also a fluid-permeable shutting-off device, which forms in the screw plug a receiving space partly delimited by the viewing window and intended for receiving the i

Abstract: The disclosure relates to a hydraulic accumulator, in particular in the form of a piston-type accumulator, having a separating element which is arranged in an accumulator housing and separates two fluid chambers from one another in a fluid-tight manner, in particular a closed accumulator chamber comprising a working gas from a liquid chamber comprising an operating liquid such as hydraulic oil, wherein a fluid connector is fluidically connected to one of the fluid chambers, wherein outside the accumulator housing and fixed thereto is an attachment part with a magnetic field generating device which acts on a fluid connection between the fluid connector of the accumulator housing and a fluid connector of the attachment part in such a way that magnetisable particles can be separated in a cleaning manner from the fluid passing through the fluid connection.

Abstract: A piston accumulator has an accumulator housing and a separating piston (8) guided for longitudinal motion in the accumulator housing. The separating piston separates a liquid side (4) from a gas side (10) in the accumulator housing. Liquid unintentionally transitions from the liquid side (4) to the gas side (10) despite a piston seal on the separating piston (8). By a return device (28), the transitioned liquid is at least partially returned from the gas side (10) of the accumulator housing to the liquid side (4) of the accumulator housing.