Abstract: The invention relates to an actuation device for at least one fluidically drivable load (10), such as a hydraulic actuator, consisting of at least one valve controller (V1) for controlling an alternating movement of each load (10) and at least one suspension device (14) which is connected between the valve controller (V1) and each load (10), wherein the suspension device (14) has an additional valve controller (V2), the valve piston (20) of which can be moved in a corresponding valve housing in a continuously adjustable manner. The invention is characterized in that a storage device (16) of the suspension device (14) is connected to the respective load (10) via a fluid path by means of the additional valve controller (V2) in a suspension position (V2.IV) of the valve piston (20) of the additional valve controller (V2).

Abstract: The invention relates to an actuation device for at least one fluidically drivable load (10), such as a hydraulic actuator, consisting of at least one valve controller (V1) for controlling an alternating movement of each load (10) and at least one suspension device (14) which is connected between the valve controller (V1) and each load (10), wherein the suspension device (14) has an additional valve controller (V2), the valve piston (20) of which can be moved in a corresponding valve housing in a continuously adjustable manner. The invention is characterized in that a storage device (16) of the suspension device (14) is connected to the respective load (10) via a fluid path by means of the additional valve controller (V2) in a suspension position (V2.IV) of the valve piston (20) of the additional valve controller (V2).

Abstract: A control device for an oscillating axle suspension, in particular a front axle suspension, includes at least of one hydraulic accumulator device (10), a suspension device (12) and a proportional valve (14) having a valve piston (26). The proportional valve (14) is connected to the accumulator and suspension devices (10, 12) via fluid ports (16, 18, 20, 22). The valve piston (26) is actuatable by an electric motor (28), is longitudinally guided in a valve housing (24) of the proportional valve (14) and controls the fluid ports (16, 18, 20, 22) such that, in at least one functional position of the valve piston (26), the axle oscillation is provided while the suspension is blocked and, in at least one further second functional position of the valve piston (26), the suspension is provided while the axle oscillation is blocked.

Abstract: An control device for an oscillating axle suspension, in particular a front axle suspension, consisting at least of one hydraulic accumulator device (10), a suspension device (12) and a proportional valve (14) having a valve piston (26), wherein to said proportional valve (14) the two devices (10, 12) are connected via fluid ports (16, 18, 20, 22), is characterized in that the valve piston (26), actuatable by an electric motor (28), is longitudinally guided in a valve housing (24) of the proportional valve (14) and controls the fluid ports (16, 18, 20, 22) such that, in at least one functional position (1) of the valve piston (26), the axle oscillation is provided while the suspension is blocked and, in at least one further second functional position (2) of the valve piston (26), the suspension is provided while the axle oscillation is blocked.

Abstract: A mobile working machine, in particular an agricultural device such as a self-propelled sprayer, comprising a structure which is hydraulically supported with respect to an undercarriage by means of cylinders (2, 4) having a piston chamber (6) and a rod chamber (8), wherein a switching device (18, 22, 36, 38) is provided which, in a switching position, fluidically connects the piston chamber (6) of a cylinder (2, 4) to the rod chamber (8) of another cylinder (2, 4), and vice versa, characterised in that, as part of the switching device, first valves (18, 22) and second valves (36, 38) are connected on the fluid-conveying connection (12, 14) between the piston chamber (6) of the one cylinder (2, 4) and the rod chamber (8) of the other cylinder (2, 4), the first valves (18, 22) each being connected on the input side to the piston chamber (6) and to a first hydraulic accumulator (28, 30) and the second valves (36, 38) being connected on the input side to the rod chamber (8) and on the output side to a second hydr

Abstract: A control apparatus for supplying at least one hydraulic consumer with fluid has a variable displacement pump (10) controlled by a load-sensing pressure (LS). For a case-by-case increase in the volume flow in the supply of fluid (22) to the hydraulic consumer, the load-sensing pressure (LS) is passed via a control line (28) to a control circuit (2) that ensures the increase in the supply (22) by connecting in a constant-displacement pump (16) as soon as an operator calls for the relevant function by operating the control circuit (2).

Abstract: An agricultural machine for discharging liquid includes a boom, a frame to which the boom is fixed such that the boom can be rotated about an axis of rotation pointing in the direction of travel, an actuating cylinder for rotating the boom about the axis of rotation, and a measurement and control system for the actuation of the actuating cylinder, wherein the actuating cylinder is mechanically connected to the frame on one side. The actuating cylinder is mechanically connected to the boom on the other side for the direct introduction of force. The actuating cylinder is formed as a double-acting actuating cylinder having a piston, to which pressure can be applied on both sides in order to move the boom in opposite directions of rotation.

Abstract: The invention relates to a control apparatus for supplying at least one hydraulic consumer with fluid having a variable displacement pump (10) which may be controlled by means of a loadsensing pressure (LS), characterized in that, for a case-by-case increase in the volume flow in the supply (22) to the hydraulic consumer, the loadsensing pressure (LS) is passed via a control line (28) to a control device (2) which ensures the increase in the supply (22) by connecting in a constant-displacement pump (16) as soon as an operator calls for the relevant function by operating the control device (2).

Abstract: A suspension device, in particular for axle suspensions in tractors, having at least one suspension cylinder, the piston rod unit (12) of which separates a piston side (18) from an annular side (14) in a cylinder housing (20), is characterized in that a pressure relief valve (26) is used to limit a maximum pressure at the annular side (14) of the relevant suspension cylinder.

Abstract: An apparatus (10) blocks and adjusts a pressure for a hydraulically controllable actuator (12), particularly a lifting unit (16) of a machine (18). The apparatus (10) allows a working chamber (20, 22) to be selectively connected to a pressure supply unit (94) having a storage device (34) or to a discharge end (66), in particular a reservoir end, by a valve unit (38). In a controlling position of the valve unit (38), when the storage pressure in the storage device (34) is greater than the working pressure in the working chamber (20) of the actuator (12), the storage pressure is relieved in the direction of the discharge end (66) until the working pressure has been reached.

Abstract: An agricultural machine for discharging liquid includes a boom, a frame to which the boom is fixed such that the boom can be rotated about an axis of rotation pointing in the direction of travel, an actuating cylinder for rotating the boom about the axis of rotation, and a measurement and control system for the actuation of the actuating cylinder, wherein the actuating cylinder is mechanically connected to the frame on one side. The actuating cylinder is mechanically connected to the boom on the other side for the direct introduction of force. The actuating cylinder is formed as a double-acting actuating cylinder having a piston, to which pressure can be applied on both sides in order to move the boom in opposite directions of rotation.

Abstract: The invention relates to an apparatus (10) for blocking and for adjusting a pressure for a hydraulically controllable actuator mechanism (12), in particular in the form of a lifting unit (16) of a machine (18). Said apparatus (10) allows at least one working chamber (20, 22) to be selectively connected to a pressure supply unit (94) comprising a storage device (34) or to a discharge end (66), in particular a reservoir end, by means of a valve unit (38). The apparatus (10) of the invention is characterized in that in a controlling position of the valve unit (38), when the storage pressure in the storage device (34) is greater than the working pressure in the at least one working chamber (20) of the actuator mechanism (12), the storage pressure is relieved in the direction of the discharge end (66) until the working pressure has been reached.

Abstract: The hydropneumatic axle suspension for vehicles, especially the front axle thereof, cooperates with at least one suspension cylinder (10) connected to a hydraulic accumulator (26; 24) on both its ring side (14) and the piston side (12). The hydraulic accumulator (26; 24) is triggerable by control electronics (18) with the aid of a valve unit (30; 28) that can be allocated to the hydraulic accumulator (26; 24). The ring side (14) of the suspension cylinder (10) is connected to a pressure value sensor (DA-R) which transmits its measured pressure values to the control electronics (18). The pressure value sensor (DA-R) located on the ring side is connected to the discharge end (38) of the valve unit (30), which can be associated with the ring side (14) of the suspension cylinder (10).

Abstract: The invention relates to a hydropneumatic axle suspension for vehicles, especially the front axle thereof, which cooperates with at least one suspension cylinder (10) that is connected to a hydraulic accumulator (26; 24) on both the ring side (14) and the piston side (12) thereof, said hydraulic accumulator (26; 24) being triggerable by control electronics (18) with the aid of a valve unit (30; 28) that can be allocated to the hydraulic accumulator (26; 24). The ring side (14) of the suspension cylinder (10) is connected to a pressure value sensor (DA-R) which transmits the measured pressure values thereof to the control electronics (18). The pressure value sensor (DA-R) located on the ring side is connected to the discharge end (38) of the valve unit (30), which can be associated with the ring side (14) of the suspension cylinder (10).

Abstract: The invention relates to a suspension system, especially for vehicles with changing load conditions. Said suspension system comprises at least one suspension cylinder (10, 12) comprising respective pressure compartments such as an annular compartment (14) and a piston compartment (16), a load-sensing system (18) for producing pressure, two supply lines, forming two main branches (22, 24), between said compartments (14, 16) and a pump connection (P) and a reservoir connection (T), one valve (26, 28) being connected in every main branch (22, 24), at least one valve (26) thereof being a pressure valve via which the pressure for the respective defined pressure compartment of the respective suspension cylinder (10, 12) can be adjusted, and a leveling device. The inventive system is characterized in that the pressure control valve (26) adjusts not only the pressure but also the leveling device. For this purpose, the pressure control valve (26) is electrically actuated by means of a control device.

Abstract: A hydraulic arrangement is provided with at least one pressure accumulator for a hydraulic fluid, a hydraulic cylinder with at least one chamber to which pressure can be applied, a connecting line, on the basis of which the at least one accumulator is connected with the chamber, and a control unit. In order to provide an electronic pipe break safety device, an electronically controlled on-off valve is mounted in the connecting line and coupled for receiving control signals from the control unit, and a signal transmitter, which is coupled for monitoring the pressure in the connecting line is also connected to the control unit. If a pressure drop occurs in the connecting line, a signal change is generated by means of the signal transmitter, whereupon the control unit sends a signal effecting movement of the shut-off valve to its closed position.

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: The invention relates to a suspension system, in particular for a working machine, such as a tractor or similar, with a suspension cylinder (10) subject to various load pressures (m), the piston-(12) and rod-side (14) of which may each be connected to a suspension reservoir (16, 18), by means of a stop device (20), which locks the suspension and with an equalization device (28) which comprises a switching valve (48) within the supply device, for controlling the piston side (12) of the suspension cylinder (10) and with a pressure supply (P) for supplying the system pressure necessary for the suspension system.

Abstract: 1. Spring suspension system, in particular for a machine.