Abstract: A hydraulic system (1) for an industrial truck, in particular an electrically operated, battery-powered industrial truck, includes a lift drive (2) to raise and lower a load handling device. The hydraulic system (1) has a first hydraulic pump (5) which is configured to supply the lift drive (2) with hydraulic fluid, and a second hydraulic pump (6) which can be switched on by means of a valve device (7) for the supply of the lift drive (2). The first hydraulic pump (5) and the second hydraulic pump (6) are configured as a hydraulic double pump unit (1) and the valve device (7) is integrated into the hydraulic double pump unit (10).

Abstract: A method for the protection of a work area of a mobile logistics robot in changing work environments, the method including controlling the mobile logistics robot using a control system, scanning the current work environment using a sensor system, monitoring the current work environment using a safety system, in which the control system autonomously defines a planned safe work area in a new work environment, and the safety system autonomously verifies and monitors the defined work area as a clear protection zone, and in the event of a breach of the clear protection zone by the entry of an object into the clear protection zone, the mobile logistics robot is automatically placed in a safe status.

Abstract: A method for the operation of an autonomous industrial truck that can move independently in an operating environment as well as an intralogistics system with at least one autonomous truck with a vehicle control device that can move independently in an operating environment. Information on the path of movement of the industrial truck is transmitted to at least one signaling unit located outside the industrial truck, in which signaling unit signals are generated that signal the path of movement of the industrial truck in the operating environment of the industrial truck.

Abstract: An autonomous industrial truck, in particular an order-picking industrial truck, including an undercarriage to support the industrial truck on a roadway. The undercarriage is located on an undercarriage chassis and the industrial truck has a supporting chassis that is provided with supporting means. The supporting chassis can be adjusted relative to the undercarriage chassis between a raised position in which the supporting means are raised from the roadway and a lowered position in which the supporting means are lowered onto the roadway.

Abstract: A method for the control of an industrial truck during order picking by an industrial truck with at least one environment sensor for the detection of the relative position of an operator in the environment of the industrial truck. The method includes moving the industrial truck using a control system. As the position of the operator changes, and when the operator stops, the industrial truck is stopped at a freely selectable distance specified in advance in the longitudinal direction of the vehicle between a reference point of a load handling device of the industrial truck and the position of the operator.

Abstract: An industrial truck has a lifting mast and vertically movable load handling device located on the lifting mast. The lifting mast has a lifting height measurement system having a light emitter that emits a light beam, a receiving element, an optical alignment element, a target element, and a measurement path located between them, the length of which measurements path varies with the lifting height. The alignment element and/or the light emitter has a beam-forming optical system, in particular a beam-expanding optical system, so that at the maximum lifting height the reflecting target is inside the expanded light beam of the light emitter in all positions of the allowable maximum bending of the lifting mast.

Abstract: A mobile machine, in particular a counterweighted fork lift truck, has at least one pressurized tank, in particular to carry fuel that is in a gaseous state under normal conditions. The tank has an at least approximately rectangular external contour in at least one cross-sectional plane.

Abstract: An industrial truck has a lifting mast and vertically movable load handling device located on the lifting mast. The lifting mast has a lifting height measurement system having a light emitter that emits a light beam, a receiving element, an optical alignment element, a target element, and a measurement path located between them, the length of which measurements path varies with the lifting height. The alignment element and/or the light emitter has a beam-forming optical system, in particular a beam-expanding optical system, so that at the maximum lifting height the reflecting target is inside the expanded light beam of the light emitter in all positions of the allowable maximum bending of the lifting mast.

Abstract: In a method for the management of industrial trucks, the industrial truck has a control computer which transmits data via a data transmission system to a central service computer. The following steps are carried out: detection of malfunctions of the industrial truck by the control computer, generation of fault codes by the control computer corresponding to the malfunctions, transmission of the fault codes via the data transmission system to the central service computer, and generation by the central service computer of instructions and/or information about required replacement parts.

Abstract: An industrial truck, in particular a fork lift truck, has a driver's seat that is oriented in the forward direction, at least one screen that is located in the vicinity of the driver's seat, a first camera pointing toward the rear of the industrial truck and at least one additional camera that is directed toward the rear. The first camera is provided to view a distant area and the additional camera is provided to view a near area behind the industrial truck. The image taken with the first camera and/or the image taken with the additional camera can be displayed on the screen. There are advantageously two additional cameras to view the near area.

Abstract: An industrial tow truck (1) includes an electrical traction drive system. At least one fuel cell unit (9) is used as the energy supply for the electrical traction drive system.

Abstract: A battery changing system is provided to change the battery in an industrial truck, such as a fork lift truck, with a battery block that can be moved in the horizontal direction by a roller conveyor relative to a battery compartment of the industrial truck. The invention teaches that the battery in the industrial truck can be changed easily and economically by providing an external roller conveyor (5) that can be moved in the vertical direction. To change the battery, the roller conveyor (5) can be placed underneath a battery compartment (2) in the industrial truck that contains the battery (1) and then the roller conveyor (5) can be raised. A floor (7) of the battery compartment (2) of the industrial truck can be provided with at least one opening (8; 9) for receiving one or more rollers of the roller conveyor (5).

Abstract: An industrial truck, such as a fork-lift truck, has an electrical drive system and an energy supply based on gaseous media. At least one pressure vessel for the storage of at least one gaseous medium is installed in a mounting device which can be easily replaced together with the pressure vessel in the lower portion of the industrial truck (5) between the axles (7). Devices necessary for the generation of electrical energy from the gaseous medium can be advantageously installed in the mounting device.

Abstract: An industrial truck (1) is provided that includes an electrical drive and a fuel cell system (8). A method for the operation of an industrial truck (1) with an electrical drive and a fuel cell system (8) is also provided. On the industrial truck (1) with an electrical drive and a fuel cell system (8) there can be at least one easily replaceable fuel reservoir (11). The method teaches that at least one easily replaceable fuel reservoir (11) can be kept on hand at the operating location of the industrial truck (1).

Abstract: A mobile machine, in particular an industrial truck (1), includes at least one pressurized tank (3), in particular to carry fuel that is in a gaseous state under normal conditions. At least one molding (10, 15, 19, 21) that is adapted to significant portions of the external contour of the tank (3) is provided, and which is made of a high density material.

Abstract: A mobile machine, in particular a counterweighted fork lift truck, has at least one pressurized tank, in particular to carry fuel that is in a gaseous state under normal conditions. The tank has an at least approximately rectangular external contour in at least one cross-sectional plane.

Abstract: A handling device is provided for a battery block (1) of an industrial truck having a lateral battery extraction opening. The handling device includes a pallet truck (3) and a battery receptacle (4) mountable on the pallet truck (3). The battery receptacle (4) on the pallet truck (3) can be inserted underneath a battery block (1) that is located in the industrial truck, whereupon the battery block (1) can be lifted and removed from the industrial truck. The battery receptacle (4) has a load-bearing frame by means of which the weight of the battery block (1) can be supported on the tines of the fork of the pallet truck (3). In one development, the handling device includes a battery tray on which the battery block (1) can be set down by the battery receptacle (4) that is located on the pallet truck (3).

Abstract: A lift truck (6) for the transport of a battery block (1) of an industrial truck, such as a fork-lift truck. The lift truck (6) includes at least one electrical unit. The electrical unit can be connected with the battery block (1) to be transported for supplying electrical energy to the lift truck (6). The lift truck (6) may not have its own battery. The electrical unit can be an electrical traction drive motor.

Abstract: An industrial truck includes at least one electronic control unit for traction functions and/or lifting functions of the industrial truck and at least one communications device for data transfer with object identification means, such as with RFID transponders. Connections can be provided for the transmission of data between the communications device and the electronic control system for traction functions and/or lifting functions of the industrial truck.