Abstract: An arrangement for releasing a coupling connection of a hydraulic quick coupler includes a hydraulic coupling for receiving a hydraulic plug. The hydraulic coupling has a coupler housing and a coupler cartridge displaceably mounted therein such that when the hydraulic plug is pushed in, the coupler cartridge adopts an operating position locking the hydraulic coupling. The arrangement also includes an actuating arrangement. The coupler cartridge is movable via the actuating arrangement from the operating position to an ejection position for releasing the hydraulic plug. The coupler cartridge is actuated by an external force operably controlled by a control arrangement.

Abstract: An arrangement for releasing a coupling connection of a hydraulic quick coupler includes a hydraulic coupling for receiving a hydraulic plug. The hydraulic coupling has a coupler housing and a coupler cartridge displaceably mounted therein such that when the hydraulic plug is pushed in, the coupler cartridge adopts an operating position locking the hydraulic coupling. The arrangement also includes an actuating arrangement. The coupler cartridge is movable via the actuating arrangement from the operating position to an ejection position for releasing the hydraulic plug. The coupler cartridge is actuated by an external force operably controlled by a control arrangement.

Abstract: A latch device (12) for a hydraulic valve (10) is proposed. The latch device (12) comprises a housing (22) and a latch shaft (26), which is supported such that it can move in the housing (22). In order to create a latch device (12), independent of the hydraulic provisioning, the provision of at least one magnetizable ring beam arrangement (38), which is supported on the latch shaft (26), and an electric solenoid arrangement (40), located on the housing (22) around the ring beam arrangement (38) is also proposed, wherein by the supply of current to the solenoid arrangement (40), a positioning force can be produced on the ring beam arrangement (38). Furthermore, a hydraulic valve (10) with the corresponding latch device (12) and a hydraulic arrangement (92) for such a valve (10) are also proposed.

Abstract: A latch device (12) for a hydraulic valve (10) is proposed. The latch device (12) comprises a housing (22) and a latch shaft (26), which is supported such that it can move in the housing (22). In order to create a latch device (12), independent of the hydraulic provisioning, the provision of at least one magnetizable ring beam arrangement (38), which is supported on the latch shaft (26), and an electric solenoid arrangement (40), located on the housing (22) around the ring beam arrangement (38) is also proposed, wherein by the supply of current to the solenoid arrangement (40), a positioning force can be produced on the ring beam arrangement (38). Furthermore, a hydraulic valve (10) with the corresponding latch device (12) and a hydraulic arrangement (92) for such a valve (10) are also proposed.

Abstract: A hydraulic circuit includes a control valve connected to a pump, a hydraulic reservoir, hydraulic work connections and a cylinder. A controllable check valve is connected between the work connections and the control valve. An overpressure safety device is connected between each work connection the corresponding check valve. In order to prevent sagging of a load on the cylinder, the overpressure safety device discharges hydraulic fluid between the check valve and the work connection to reduce an overpressure. The overpressure safety device includes an overpressure valve and a throttle connected downstream of this valve to throttle the flow of hydraulic fluid discharged through the overpressure safety device.

Abstract: A housing structure is provided having at least two housing sections each provided for covering and/or closing a hydraulic coupling, particularly for dust protection. A first hydraulic coupling is disposed above a second hydraulic coupling, preferably in a vehicle or tool, such as a commercial agricultural or industrial vehicle. A housing section has an opening that is reversibly sealable with a closing element and through which a counterpart of a hydraulic coupling can be inserted to create a hydraulic connection. The housing structure has an area disposed below for collecting leaking fluid. Retaining means are provided for each reversibly sealable opening by which the escape of leaking fluid from the respective opening is largely preventable. Wetting of the hydraulic coupling with leaking fluid and the escape of leaking fluid from the opening of the housing structure is avoided by simple structural means.

Abstract: A housing structure is provided having at least two housing sections each provided for covering and/or closing a hydraulic coupling, particularly for dust protection. A first hydraulic coupling is disposed above a second hydraulic coupling, preferably in a vehicle or tool, such as a commercial agricultural or industrial vehicle. A housing section has an opening that is reversibly sealable with a closing element and through which a counterpart of a hydraulic coupling can be inserted to create a hydraulic connection. The housing structure has an area disposed below for collecting leaking fluid. Retaining means are provided for each reversibly sealable opening by which the escape of leaking fluid from the respective opening is largely preventable. Wetting of the hydraulic coupling with leaking fluid and the escape of leaking fluid from the opening of the housing structure is avoided by simple structural means.

Abstract: A housing structure is provided having at least two housing sections each provided for covering and/or closing a hydraulic coupling, particularly for dust protection. A first hydraulic coupling is disposed above a second hydraulic coupling, preferably in a vehicle or tool, such as a commercial agricultural or industrial vehicle. A housing section has an opening that is reversibly sealable with a closing element and through which a counterpart of a hydraulic coupling can be inserted to create a hydraulic connection. The housing structure has an area disposed below for collecting leaking fluid. Retaining means are provided for each reversibly sealable opening by which the escape of leaking fluid from the respective opening is largely preventable. Wetting of the hydraulic coupling with leaking fluid and the escape of leaking fluid from the opening of the housing structure is avoided by simple structural means.

Abstract: A telescopic boom arrangement of a vehicle is provided with a fixed, tubular outer boom and an inner boom which is mounted for sliding within the outer boom. Transmission lines for coupling various functions, carried at the end of the inner boom, with a power source/and or controls include an intermediate section mounted to the outer boom by a transmission line routing assembly which holds first ends of the intermediate section of the transmission lines at a fixed location and establishes a guide along which second ends of the section of transmission lines is moveable lengthwise of the outer boom. The intermediate section of the transmission lines is flexible and defines a bow which changes in length as the inner boom extends and retracts relative to the outer boom.

Abstract: A telescopic boom arrangement of a vehicle is provided with a fixed, tubular outer boom and an inner boom which is mounted for sliding within the outer boom. Transmission lines for coupling various functions, carried at the end of the inner boom, with a power source/and or controls include an intermediate section mounted to the outer boom by a transmission line routing assembly which holds first ends of the intermediate section of the transmission lines at a fixed location and establishes a guide along which second ends of the section of transmission lines is moveable lengthwise of the outer boom. The intermediate section of the transmission lines is flexible and defines a bow which changes in length as the inner boom extends and retracts relative to the outer boom.

Abstract: A hydro-pneumatic axle spring suspension system for the driven axle of an agricultural utility vehicle, in particular for the front axle of an agricultural tractor, is described, which contains at least one hydraulic cylinder arranged between the vehicle chassis and axle body. The rod end chamber and the piston end chamber of the hydraulic cylinder are each connected with at least one accumulator. Furthermore a valve circuit supplied by a hydraulic pump is provided for the control of the level, which controls the pressure of the accumulators as a function of the load on the axle body.To improve the operating and spring characteristics of the utility vehicle it is proposed that the mechanical and hydraulic components be designed for a spring suspension under maximum load of the axle body.