Provided is an apparatus capable of preventing an auxiliary cylinder attached to a derricking member of a working machine from undesirable rotational movement. The apparatus includes an auxiliary cylinder capable of making expansion and contraction motions, an auxiliary-cylinder angle detector, a fixing device, and an expansion controller. The fixing device fixes the auxiliary cylinder to the derricking member when the expansion length of the auxiliary cylinder is in the fixing allowing range, and releases the fixing of the auxiliary cylinder at other times. The expansion controller judges the posture of the auxiliary cylinder based on the auxiliary-cylinder angle detected by the auxiliary-cylinder angle detector, allows the expansion and contraction motions when the auxiliary cylinder is in the vertical posture, and prohibits the auxiliary expansion and contraction motions when the auxiliary cylinder is in a posture other than the vertical posture and the auxiliary cylinder is fixed to the derricking member.

The present disclosure relates to a crane, in particular an offshore crane, having a slewing gear and a hydraulic slewing gear drive, wherein the slewing gear is held in its position via a holding torque applied by the hydraulic slewing gear drive, and wherein an overload safety device is provided having at least one detection means for detecting the outreach and/or the position of the crane hook and having at least one pressure relief valve, with the system pressure applied to the hydraulic slewing gear drive via at least one pressure relief valve can be regulated in dependence on the outreach and/or on the position of the crane hook.

A sensing device for a crane for detecting unsafe operating conditions including an inertial measurement unit for measuring pitch and yaw of a hook of a crane attached to a load. The inertial measurement unit is adapted to measure deviation of the hook of the crane from a plumb position and activate an alert element if the deviation of the hook exceeds a predetermined limit.

The present invention provides a work machine in which load shaking of a crane in emergency can be prevented. In the work machine, a turning body is disposed to be turnable relative to a base body. The work machine includes a drive control unit which controls a turning operation of the turning body, and a detection unit which detects an obstacle present around the turning body. The drive control unit does not start turning of the turning body in a case where the obstacle is detected by the detection unit while the turning of the turning body is stopped, and maintains the turning of the turning body for at least a predetermined period in a case where the obstacle is detected by the detection unit during the turning of the turning body.

A system includes a hoist drive mechanism that elevates and lowers a load hook from a boom and a detector that provides obstacle location and identification information. A processor receives the obstacle location and identification information from the detector and provides obstacle avoidance data in response thereto.

A hoist lifting system having planning and monitoring of components. The system monitors one or more components and may have a processing structure and memory storing instructions to configure the processing structure to: receive hoist machine data; determine a rotation speed of a bearing, a travel speed of a rope, a load on the bearing, a friction in the at least one bearing based on the hoist machine data; and store the rotation speed, the travel speed, the load, and the friction in a maintenance database in memory. The hoist lifting system may have the processing structure determine a wear of one or more components.

A method for controlling a materials handling and/or construction machine, such as a crane or cable excavator, wherein different control functions are selected on a screen of a controller with a touchscreen function by touching a control function symbol, and respective functional parameters of the selected control function are set. A working region boundary of a working region delimiting function for automatically deactivating and/or slowing down at least one actuator is displayed on the screen together with a display of the materials handling and/or construction machine and/or the work surroundings in the form of a touchscreen display element when the working region boundary is reached and is adjusted by touching and moving the working region boundary on the screen relative to the display of the materials handling and/or construction machine and/or the work surroundings thereof.

A fire apparatus includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, a ladder assembly coupled to the chassis, and a stability system. The stability system includes at least one of (i) a front downrigger coupled to the chassis, (ii) a rear downrigger coupled the chassis, or an outrigger coupled to the chassis. The stability system is controllable to facilitate leaning the fire apparatus at least two degrees relative to a ground surface while maintaining full operational capability of the ladder assembly.

Tower crane (1) comprising a tower (2) on which a rotating portion (3) is pivotally mounted and configurable between a service configuration in which the rotating portion can be rotatably driven by means of a motorized orientation system (40), and an out of service configuration in which the rotating portion is rotatably released to be able to be oriented in the direction of the wind, where a control/command unit (5) activates a monitoring mode in the out of service configuration to detect, depending on variations in the angle of orientation or the angular speed of the rotating portion, if the rotating portion is in one of the following instability states: an autorotation state corresponding to a rotary movement of the rotating portion in a given direction over at least one complete turn; or an oscillation state corresponding to a back and forth movement of the rotating portion about the orientation axis.

A mobile working machine comprising: a chassis (5); stabilizer legs (10) connected to the chassis; a hydraulic crane (20) carried by the chassis and comprising a crane boom (25) articulately connected to a rotatable column (22) and a lifting cylinder (26) for pivoting this crane boom; and an electronic control device configured to establish a maximum allowed working pressure for the lifting cylinder while taking into account the contribution to the stability of the mobile working machine against tipping from each stabilizer leg (10) that is in an active supporting position. The electronic control device prevents a manoeuvring of a stabilizer leg away from the active supporting position if the working pressure of the lifting cylinder is higher than a threshold value corresponding to the value of the maximum allowed working pressure for the lifting cylinder that would ensue in case the stabilizer leg is made to leave the active supporting position.