A hydraulic crane comprising: —a rotatable column (7); —a crane boom system (10) comprising two or more liftable and lowerable crane booms (11, 13); and—an electronic control device (25), which is configured to prevent an execution of crane boom movements that would make the lifting moment of the crane exceed the maximum allowed lifting moment of the crane, and to continuously establish position information as to the prevailing position of the load suspension point (P) of the crane boom system. When the lifting moment of the crane has reached a limit value at a given level below the maximum allowed lifting moment, the electronic control device is configured to prevent the execution of any combination of crane boom movements that would increase the horizontal distance between the load suspension point and said vertical axis of rotation and at the same time allow the execution of any combination of crane boom movements that keeps said horizontal distance unchanged or reduces said horizontal distance.

A vehicle includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, and a stability system. The stability system includes a pair of front downriggers coupled to the chassis forward of the front axle and an outrigger assembly coupled to the chassis between the front axle and the rear axle. The outrigger assembly includes a pair of outriggers that are selectively extendable laterally outward at an angle relative to a horizontal.

A tracked vehicle, controller for the tracked vehicle, and a method performed thereon are provided that enable the pilot to steer the tracked vehicle using an existing joystick of the tracked vehicle.

A mobile crane includes: a lower traveling body including a pair of crawlers; an upper slewing body supported on the lower traveling body slewably about a slewing axis; a tiltable attachment including a boom tiltably supported on the upper slewing body; and a physical quantity detector. The lower traveling body has a reaction force receiving part for receiving a reaction force from the ground at a position away from the slewing axis in a boom direction in a state where the pair of crawlers are in contact with the ground, the boom direction coinciding with a horizontal component of a direction in which the boom extends from the upper slewing body, and the physical quantity detector detects a physical quantity which changes in accordance with a change in the reaction force received from the ground by the reaction force receiving part.

To suppress rotation of a cylinder rod relative to a cylinder body while avoiding interference of a weight cylinder connecting a distal end of a mast to a weight guy line with other members in assembling and disassembling. The crane includes a pair of right and left weight cylinders having a cylinder body and a cylinder rod, and a pair of right and left mast cylinder connecting portions. The pair of right and left mast cylinder connecting portions regulate the rotation of the cylinder rod and connect the right and left both side parts of the mast and the pair of right and left cylinder rods to each other.

A crane includes a carrier unit having a chassis, tires connected to the chassis, a carrier deck and outriggers. A superstructure is mounted on the carrier unit, the superstructure includes a telescoping boom. A slope sensor is operably connected to the carrier unit and configured to detect a pitch and/or a roll of the carrier unit during a lift operation. The crane further includes a system for monitoring a load lifted by the telescoping boom. The system is configured to determine the current load lifted by the telescoping boom, receive pitch and/or roll information of the carrier unit from the slope sensor, adjust coordinates of the crane in a coordinate system based on the pitch and/or roll information, determine a transformed operating radius using the adjusted coordinates; and compare the load lifted to a rated capacity at the transformed operating radius.

A method and apparatus to invert a robotic arm, includes an angling adaptor and swing arm. The angling adaptor includes a truck or crane boom head adaptor and a hinge coupler. The swing arm extends downwardly from the angling adaptor and may include a boom adaptor arm and a jib. The lower end of the swing arm is mounted to the main beam of the robotic arm. The hinge coupler mounts to the upper end of the crane or truck boom. The robotic arm is mounted on the swing arm so as to downwardly orient the insulators on the robotic arm. A lowermost end of each insulator is adapted for releasably holding an electrical bypass which may include a bus bar and electrical cable jumpers.

A vehicle crane having a lower carriage with a longitudinal axis and a superstructure that is rotatable about a vertical axis includes at least one base support and at least two side supports arranged on the lower carriage, where the base support and the side supports can be supported with respect to the ground. The two side supports are each arranged on the lower carriage via a support carrier and oppositely in relation to the longitudinal axis of the lower carriage, and precisely two side supports are arranged on the lower carriage. Each base support is arranged oppositely with respect to the two side supports in relation to the vertical axis and as seen in the direction of the longitudinal axis, and a rotary connection support for the superstructure is arranged on the lower carriage and the two support carriers are arranged remotely from the rotary connection support.

A crane for lifting and transporting loads includes a base frame, for transferring the loads of the crane onto a support surface by a plurality of wheels having two steering wheels; and a steering system. The steering system includes a linear steering actuator, which is hinged, on one side, to the base frame and, on the other side, to a bar having two ends. Each end of the bar is hinged to a respective rotary element around a respective hinging axis. Each rotary element rotates around a respective rotation axis and is constrained in rotation to the respective steering wheel to steer it.

A lifting rig for moving heavy objects on rooftops having a framework supported by a plurality of sets of wheel assemblies. The framework has a pair of longitudinal truss assemblies wherein each truss assembly sits on top of the sets of wheel assemblies. Each of the two truss assemblies has a mast member extending upwardly to a cross beam which thus connects both truss members. Each mast member extends telescopically from an anchor post which itself extends perpendicularly from a truss member forming part of the truss assembly. From the cross beam hangs at least one chain block for raising and lowering a load; the chain block is hooked onto a means for hooking straddling over the cross beam.