A wind turbine lifting arrangement includes a tower, a nacelle, a lifting platform and a lifting device attached to the lifting platform for lifting components to be installed in or deinstalled from the nacelle, the nacelle including a main frame attached to a top section of the tower, an attachment portion of the lifting platform being arranged underneath the nacelle and attached to the main frame. The lifting platform includes a lifting device portion provided adjacent to the attachment portion, the lifting device is attached to the lifting platform in the lifting device portion and the lifting device portion and the lifting device are arranged next to a longitudinal side of the nacelle which is one of two opposite longitudinal sides of the nacelle extending along a longitudinal axis of the nacelle and arranged between a top side and bottom side of the nacelle.

Method and apparatus for a portable hoisting system (10) having an upright gin pole (38) which is attached to the upright standing very tall pole (14) or tower (15) using a plurality of straps (16). Extending away from the gin pole (38) is an angularly adjustable arm (40) which is user selectable to be either, e.g., at a 90-degree angle or a 45-degree angle, which arm (40) is supported by a brace (42) connected between the extension arm (40) and the upright gin pole (38). The gin pole (38) is hollow on its inside which allows a load line (18) to travel through the interior (60) of the gin pole (38) from its lower end to its upper outlet end and includes a plurality of pulleys (44) which allow the load line (18) to travel through the inside (60) of the hoisting system (10). Also included is a heel block (24) wherein one end of the load line (18) is connected to a capstan hoist (30) disposed on the front or rear end of a vehicle (32) and a ball (19) with hook (20) for supporting a load (22). Also included optionally is a tag line (34) connected to the load line (18) and being held by a ground member (36) for helping to control the movement of the load (22).

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

There is shown a mounting system for a crane that utilizes frictional engagement to a wall surface and does not use counterweights or conventional methods to resist crane forces.

There is shown a mounting system for a crane that utilizes frictional engagement to a wall surface and does not use counterweights or conventional methods to resist crane forces.

A crane system is for a cantilever belonging to a jack-up rig. The crane system has a crane with a suspension member, the suspension member being arranged over the crane. A skid beam is attached to a lower portion of the cantilever, the skid beam being displaceably connected to a plurality of slides arranged on the jack-up rig, the crane hanging on the skid beam. A method is for using the crane system.

The present invention refers to a modular system for fast connection of habitable modules (2) based on coupling standardized shipping containers to adjusted receiving structures (3). This system is based on a connecting plate system (1), habitable modules (2), a receiving structure (3), an alveolar structure (7) to connect said receiving structure (3) and automatic systems for transport, lifting, docking and coupling. The present invention refers also to a method of fast connection of habitable modules (2) within this modular structure.

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 crane capable of handling major components during installation or servicing of wind turbines includes a main body on which is mounted a crane arm, and a lifting point at or near an upper end of the main body to which a hoisting cable assembly is joined or around which a lifting cable is passed and which carries a major part of the crane weight as it is hoisted up a tower of the wind turbine, wherein the lifting point is laterally adjustable relative to the main body in a direction which is generally towards or away from the tower when in its lifting orientation in order to allow control of the crane balance.

An apparatus to drag logs to a log splitter from locations distant from the log splitter to locations near the log splitter, and then to assist with lifting logs for placement on the log splitter, comprises generally a mast-and-boom assembly with a first mount point and first pulley, and a second mount point and second pulley at a height below said first mount point and first pulley, a winch, and a cable attached a one end to said winch, threaded through said first pulley and said second pulley, and connectable at the other end to a log via a connection means, said apparatus being suitable for integration with a log splitter.