The present disclosure relates to a lifting device, in particular a mobile crane or a cable-operated excavator, that comprises a superstructure, a main boom that starts from the superstructure, a luffing boom that starts from the end of the main boom remote from the superstructure, a winch arrangement, and a tilting moment detection unit for determining the tilting moment acting on the lifting device by the position of the main boom and the luffing boom. The disclosure is characterized by an apparatus for assisting or for fully automatic carrying out an erecting and/or placing down procedure of a boom system comprising the main boom and the luffing boom that is configured to carry out the steps for erecting and/or placing down the boom system in dependence on the tilting moment detected by the tilting moment detection unit.

A foldable boom for conveying an item, said foldable boom being foldable about at least one folding axis, said foldable boom being locatable in a folded stowed position, and moveable to unfolded extended positions; said foldable boom having a near end arranged for pivotal movement about a first horizontal axis located on a turret, said turret being rotatable about a vertical axis; said foldable boom having first conveying apparatus to convey an item therealong, internally within said foldable boom, to a remote end of the foldable boom; wherein said foldable boom is foldable about a folding axis, and a pivoting shuttle equipped with a clamp to releasably hold an item is provided at said folding axis to transfer said item between said first conveying apparatus in boom elements connected about said folding axis.

A foldable boom for conveying an item, said foldable boom being foldable about at least one folding axis, said foldable boom being locatable in a folded stowed position, and moveable to unfolded extended positions; said foldable boom having a near end arranged for pivotal movement about a first horizontal axis located on a turret, said turret being rotatable about a vertical axis; said foldable boom having first conveying apparatus to convey an item therealong, internally within said foldable boom, to a remote end of the foldable boom; wherein said foldable boom is foldable about a folding axis, and a pivoting shuttle equipped with a clamp to releasably hold an item is provided at said folding axis to transfer said item between said first conveying apparatus in boom elements connected about said folding axis.

Disclosed is a knuckle boom crane for offshore application, wherein the crane includes a knuckle boom, carried by a support structure and equipped with an operating unit. The knuckle boom includes a main boom and a terminal boom. The operating unit of the knuckle boom include at least one downstream linear actuator, arranged between the main boom and the terminal boom, for the rotational operation of the terminal boom about a downstream articulation axis. And the at least one downstream linear actuator is fastened to one of the lateral faces of the main boom and to one of the lateral faces of the terminal boom, in order to provide an improved lever arm between the main boom and the terminal boom.

Disclosed is a knuckle boom crane for offshore application, wherein the crane includes a knuckle boom, carried by a support structure and equipped with an operating unit. The knuckle boom includes a main boom and a terminal boom. The operating unit of the knuckle boom include at least one downstream linear actuator, arranged between the main boom and the terminal boom, for the rotational operation of the terminal boom about a downstream articulation axis. And the at least one downstream linear actuator is fastened to one of the lateral faces of the main boom and to one of the lateral faces of the terminal boom, in order to provide an improved lever arm between the main boom and the terminal boom.

A first width direction bending portion bendably connects a portion of a guy link on a distal end side with respect to a first link portion to the first link portion in a width direction. When the guy link is in a stored state, the portion of the guy link located on the distal end side with respect to the first width direction bending portion is disposed outside the first link portion in the width direction. When the guy link is in a stored state, at least a portion of the guy link is disposed on the outer side in the width direction than a front strut and on a back surface or a side surface of a lower jib.

A first width direction bending portion bendably connects a portion of a guy link on a distal end side with respect to a first link portion to the first link portion in a width direction. When the guy link is in a stored state, the portion of the guy link located on the distal end side with respect to the first width direction bending portion is disposed outside the first link portion in the width direction. When the guy link is in a stored state, at least a portion of the guy link is disposed on the outer side in the width direction than a front strut and on a back surface or a side surface of a lower jib.

A jib assembly includes a support; a jib attached pivotally to the support for pivotal movement of the jib in relation to the support about a horizontal axis; a first linear hydraulic actuator attached to the support for regulating pivotal movement of the jib and for maintaining the jib in a specific position relative to the support; a lever arm attached unrotatably to the jib; and a draw member attached to the lever arm and to the jib; wherein the first linear hydraulic actuator is attached to the lever arm, and the lever arm is arranged to extend in the direction above the jib.

A jib assembly includes a support; a jib attached pivotally to the support for pivotal movement of the jib in relation to the support about a horizontal axis; a first linear hydraulic actuator attached to the support for regulating pivotal movement of the jib and for maintaining the jib in a specific position relative to the support; a lever arm attached unrotatably to the jib; and a draw member attached to the lever arm and to the jib; wherein the first linear hydraulic actuator is attached to the lever arm, and the lever arm is arranged to extend in the direction above the jib.

System, apparatus, device, kit, method and associated technique for safely and securely lifting wall and other structures to a vertical position. An electronic winch device that when connected to an end of a wall structure lifts the structure. A keeper or catchment such that when the electronic winch has hoisted the wall structure to a substantially vertical position, catches and keeps the wall structure in place, allowing the technician to more properly secure the wall structure. The apparatuses are also designed for portability and collapsibility, with structural members telescoping inside one another to minimize size in transport but securely configurable when extended and locked into place.