A nacelle-mountable lift system for mounting and dismounting a rotor blade of a wind turbine involves a jib crane mountable on the nacelle and a blade sheath. The blade sheath is connectable to the hook of the jib crane by lines attachable to the top end of the sheath. The holder is raiseable and lowerable by a winch mounted on the crane to raise and lower the sheath with the rotor blade retained therein when the rotor blade is disconnected from the hub or to raise and lower the sheath to retain the rotor blade in or release the rotor blade from the sheath when the rotor blade is connected to the hub.

A nacelle-mountable lift system for mounting and dismounting a rotor blade of a wind turbine involves a jib crane mountable on the nacelle and a blade sheath. The blade sheath is connectable to the hook of the jib crane by lines attachable to the top end of the sheath. The holder is raiseable and lowerable by a winch mounted on the crane to raise and lower the sheath with the rotor blade retained therein when the rotor blade is disconnected from the hub or to raise and lower the sheath to retain the rotor blade in or release the rotor blade from the sheath when the rotor blade is connected to the hub.

An elongated pull element (14), in particular for an element of an expandable heavy equipment (1) comprises a bundle of load bearing fibers/fibres (41) extending along the length of the elongated pull element (14), and stiffening means (54) comprising an exoskeleton for increasing the bending stiffness of the elongated pull element (14), compared to the bending stiffness of the load bearing fibers/fibres (41).

An elongated pull element (14), in particular for an element of an expandable heavy equipment (1) comprises a bundle of load bearing fibers/fibres (41) extending along the length of the elongated pull element (14), and stiffening means (54) comprising an exoskeleton for increasing the bending stiffness of the elongated pull element (14), compared to the bending stiffness of the load bearing fibers/fibres (41).

A work machine includes a base, a mount coupled to the base, wherein the mount is configured to support an arm. The arm is pivotally coupled to the mount, and includes a boom and an engagement mechanism positioned at the head of the boom. The mount is configured to raise and lower the arm relative the base. The engagement mechanism may include an extendable grabber to interface with one or more objects and lift and position the objects using the mule. The work machine may include a leveling system coupled to the base. The leveling system is configured to stabilize the base in an approximately level position, and includes a plurality of outriggers positionable between a stowed position and a deployed position. A first total width of the work machine in the deployed position is greater than a second total width of the work machine in the stowed position.

A nacelle-mountable lift system for mounting and dismounting a rotor blade of a wind turbine involves a jib crane, the jib crane having a base removably mountable on a nacelle of the wind turbine and a jib mounted on the base. The jib has a boom arm supported on the base by at least one support strut extending between the base and the boom arm. A winch is mounted on the boom arm. At least two sheaves are rotatably mounted on the boom arm. A holder is connectable to the blade. At least two lift cables pass over the at least two sheaves connecting the holder to the winch. The boom arm is positionable to position the holder beyond a rotor hub of the wind turbine when the crane is mounted on the nacelle.

A nacelle-mountable lift system for mounting and dismounting a rotor blade of a wind turbine involves a jib crane, the jib crane having a base removably mountable on a nacelle of the wind turbine and a jib mounted on the base. The jib has a boom arm supported on the base by at least one support strut extending between the base and the boom arm. A winch is mounted on the boom arm. At least two sheaves are rotatably mounted on the boom arm. A holder is connectable to the blade. At least two lift cables pass over the at least two sheaves connecting the holder to the winch. The boom arm is positionable to position the holder beyond a rotor hub of the wind turbine when the crane is mounted on the nacelle.

The present invention relates to a lifting assembly (1) for elevating components to a wind turbine (5). The lifting assembly comprises a plurality of tower segments (13) which together form an elongated tower (9), a support frame (11) for supporting the tower (9), a securing assembly (32) securing the tower (9) to the wind turbine (5). The lifting assembly (1) further comprises an upper platform (7) provided with and a crane (21) and vertically movable along the tower (9), and a lower platform (8) provided with a storage area (16) for supporting components and vertically movable along the tower (9) between the upper platform (7) and the support frame (11). The crane is adapted to move components to and from the storage area (16) of the lower platform (8).

A gantry system has at least one crane assembly, at least one support post, and at least one hoist. The crane assembly has a stationary base, a rotating base, and a crane arm. The rotating base is attached to both the stationary base and the crane arm in such a ways as to allow the rotating base and the crane arm to rotate while the stationary base remains stationary. The crane arm is supported on its far end by a support post. The crane assembly is configured such that the support post rests on an in-place girder. A hoist is attached and can move along the crane arm to position a railway component, such as a replacement girder and/or a precast panel.

An elongated pull element (14), in particular for an element of an expandable heavy equipment (1) comprises a bundle of load bearing fibers/fibres (41) extending along the length of the elongated pull element (14), and stiffening means (54) comprising an exoskeleton for increasing the bending stiffness of the elongated pull element (14), compared to the bending stiffness of the load bearing fibers/fibres (41).