A drive system (46) for a telescoping boom (22) includes an elongated member (48), a locking head (50) configured to be driven on the elongated member, an actuator (52) configured to drive the locking head on the elongated member, and a cabling assembly (54) interconnected between the actuator and the locking head such that the locking head is driven on the elongated member in response to operation of the actuator, the cabling assembly including a cable (64) and a plurality of sheaves (66, 68). The telescoping boom includes a base section (34) and one or more telescoping sections (36, 38, 40) configured for telescoping movement relative to the base section, and the locking head is configured to selectively engage and disengage a telescoping section of the one or more telescoping sections.

A vehicle crane having a superstructure with a jib system including a main jib mounted in a luffable manner on the superstructure, with a jib head and a luffable additional jib and at least one luffing support supported in the region of a luffing axis of the additional jib. At least one guying support of the jib system is arranged in such a manner that a tensioner starting on the one hand from the superstructure and/or from a counterweight and connected on the other hand to the additional jib is guided via the at least one guying support and the at least one luffing support. A main jib extension is incorporated between the jib head and the additional jib with the at least one guying support supported at the main jib extension to obtain a longer design of the jib system with the highest possible permissible bearing load.

A hoisting crane or multi configurations crane system for use on an offshore vessel, such a vessel and methods for operating are disclosed. The hoisting crane comprises a boom having a proximal portion, an intermediate portion and a distal portion. An extension mechanism is provided that is configured to allow the distal portion to be slid relative to the intermediate portion from a retracted configuration to an extended configuration. In the retracted configuration, the intermediate portion is arranged substantially within the distal portion.

Telescopic lattice type crane boom for a crane, further comprising a locking system configured to lock at least one telescopic boom section with respect to a base boom section in at least an extended position, wherein said locking system includes a plurality of pins, each pin being configured to extend, in at least the extended position of the boom, at least partly through a corresponding pin receiving aperture provided in one of the base boom section and the at least one telescopic boom section.

A boom-extending wire locking structure has a wire locking tool, provided at a base end side of a first boom member and/or a base end side of a third boom member, that locks an extending wire by winding a lock part of each wire member. The wire locking tool includes: a pair of fixing pieces provided on both sides in an orthogonal direction orthogonal to a boom-extending direction and fixed to the first boom member and/or the third boom member; and wire locking parts, provided between the pair of fixing pieces, including arch-shaped grooves for winding the respective lock parts of the wire members. The wire locking parts are arranged in a central axis direction of the arc shape between the pair of fixing pieces. Central axes of the wire locking parts are arranged at different positions in the orthogonal direction from respective adjacent wire locking parts.

The telescopic lift arm (1) for self-propelled operating machines (10), such a lifters, telehandlers and the like, comprises three tubular elements (21, 22, 23, 24, 25, 26), having a decreasing section and telescopically connected to one another to define a support structure which is able to move between a retracted configuration in which the tubular elements (21, 22, 23, 24, 25, 26) are inserted in one another, and an elongate configuration, in which two tubular elements are extracted. The arm (1) comprises a hydraulic actuator (4), associated to the support structure (21, 22, 23, 24, 25, 26) and provided with three hydraulic elements (41, 42, 43) telescopically connected to one another, each of which is connected to a respective tubular element of the support structure.

A boom-extending wire locking structure has a wire locking tool, provided at a base end side of a first boom member and/or a base end side of a third boom member, that locks an extending wire by winding a lock part of each wire member. The wire locking tool includes: a pair of fixing pieces provided on both sides in an orthogonal direction orthogonal to a boom-extending direction and fixed to the first boom member and/or the third boom member; and wire locking parts, provided between the pair of fixing pieces, including arch-shaped grooves for winding the respective lock parts of the wire members. The wire locking parts are arranged in a central axis direction of the arc shape between the pair of fixing pieces. Central axes of the wire locking parts are arranged at different positions in the orthogonal direction from respective adjacent wire locking parts.

A telescopic boom that includes a plurality of extensible boom sections and a power source for delivering translational force to the boom sections. The boom further includes at least one rope transiting between boom sections wherein a first section is extending, and the second section is adjacent to the extending sections. The rope is redirected by at least one sheave mounted to the adjacent section and further redirected by at least one sheave mounted to the extensible section.

A telescopic boom for a working device, in particular a crane or mobile crane, includes at least three telescopic sections. A first telescopic section is arranged at least partially around a second telescopic section, and the second telescopic section is arranged at least partially around a third telescopic section. A drive device is provided for telescopically retracting and/or extending the second telescopic section relative to the first telescopic section, and a synchronizing device is configured to allow the third telescopic section to be telescopable relative to the second telescopic section, in particular synchronously. The synchronizing device is arranged substantially completely within the second telescopic section.

A system for design of a synchronous rope extended telescoping boom, the system including a base section, a rope extended tip section, and at least one rope extended boom section disposed between the base section and the tip section, each section having an open interior space. An extensible power source disposed within the open interior space of the base section for translating the rope extended boom sections, the power source comprising an extensible first end and an unanchored body portion, wherein the extensible first end is anchored to the base section proximate a trailing edge of the first section.