Abstract: A large mobile crane including an undercarriage. The undercarriage includes a middle section between tracks, wherein a distance between the tracks can be increased or decreased by the insertion or removal of expansion parts. The two tracks are connected on opposite sides of the undercarriage to permit movement of the large mobile crane. The undercarriage also includes a drive unit, a superstructure, one or more control stations, at least two main booms, at least one derrick boom, and at least two lifting devices and counterweights. The counterweights are either arranged separately of or mounted on the undercarriage. The large mobile crane further includes a circular track, and support rollers attached to the superstructure, wherein the support rollers ride on the circular track, and wherein the circular track is an integral part of the expansion parts.

Abstract: A multi-component lattice mast section comprises a longitudinal axis, a plurality of chord elements extending along the longitudinal axis, a plurality of connection bars interconnecting in each case two adjacent chord elements, a lattice mast cross-sectional surface area with a lattice mast width and a lattice mast height, the lattice mast cross-sectional surface area being oriented perpendicular to the longitudinal axis, and at least two detachably interconnectable lattice mast assemblies, with each of the lattice mast assemblies having a lattice mast assembly width smaller than the lattice mast width and/or a lattice mast assembly height smaller than the lattice mast height, and with the connection bars being firmly connection to a chord element in a working arrangement.

Abstract: A multi-component lattice mast section comprises a longitudinal axis, a plurality of chord elements extending along the longitudinal axis, a plurality of connection bars interconnecting in each case two adjacent chord elements, a lattice mast cross-sectional surface area with a lattice mast width and a lattice mast height, the lattice mast cross-sectional surface area being oriented perpendicular to the longitudinal axis, and at least two detachably interconnectable lattice mast assemblies, with each of the lattice mast assemblies having a lattice mast assembly width smaller than the lattice mast width and/or a lattice mast assembly height smaller than the lattice mast height, and with the connection bars being firmly connection to a chord element in a working arrangement.

Abstract: A large mobile crane including an undercarriage. The undercarriage includes a middle section between tracks, wherein a distance between the tracks can be increased or decreased by the insertion or removal of expansion parts. The two tracks are connected on opposite sides of the undercarriage to permit movement of the large mobile crane. The undercarriage also includes a drive unit, a superstructure, one or more control stations, at least two main booms, at least one derrick boom, and at least two lifting devices and counterweights. The counterweights are either arranged separately of or mounted on the undercarriage. The large mobile crane further includes a circular track, and support rollers attached to the superstructure, wherein the support rollers ride on the circular track, and wherein the circular track is an integral part of the expansion parts.

Abstract: The object of the invention is to reduce the amount of investment required for the usage-optimized configuration and installation of large cranes. This object is achieved by a large mobile crane having an undercarriage, a drive unit (16), a revolving superstructure (18), one or more control stations (17), at least two jibs (3), at least one counter-jib (4), at least two lifting arrangements (22) and counterweights arranged separately or on the basic structure, characterized in that the load-bearing parts of the crane (3, 4, 20) and the mobility-specific parts (5, 6, 7) are of modular design and can be supplemented by exchangeable and/or supplementary parts, wherein the structural units (modules) used essentially correspond, or are similar, to existing standard-crane components, and an increase in load-bearing capacity can be achieved by arranging a number of these in the large crane.

Abstract: A large mobile crane includes a revolving superstructure, a main boom hinged to the superstructure, and a derrick boom hinged to the superstructure. A modular counterweight system includes a traveling counterweight and a non-traveling counterweight connected to a crossbeam suspended from the distal end of the derrick boom so that the non-traveling counterweight is activated before the traveling counterweight.

Abstract: The invention relates to a combination double bottom hook block in which two pulley blocks (2, 3) each with a plurality of pulleys are connected to one another by means of a rocker (1), a load hook being mounted in a pivotable manner on the rocker. If use is made here of two lifting cables, each of these lifting cables is led over a pulley block (2, 3) and, in order to achieve the same loading capability if use is made of just one lifting cable, the latter is led, in addition, over a floating pulley (2) which is mounted between the two pulley blocks (2, 3), the two pulley blocks (2, 3) also being secured against tilting.

Abstract: The object of the invention is to reduce the amount of investment required for the usage-optimized configuration and installation of large cranes. This object is achieved by a large mobile crane having an undercarriage, a drive unit (16), a revolving superstructure (18), one or more control stations (17), at least two jibs (3), at least one counter-jib (4), at least two lifting arrangements (22) and counterwvejghts arranged separately or on the basic structure, characterized in that the load-bearing parts of the crane (3, 4, 20) and the mobility-specific parts (5, 6, 7) are of modular design and can be supplemented by exchangeable and/or supplementary parts, wherein the structural units (modules) used essentially correspond, or are similar, to existing standard-crane components, and an increase in load-bearing capacity can be achieved by arranging a number of these in the large crane.

Abstract: The invention relates to a combination double bottom hook block in which two pulley blocks (2, 3) each with a plurality of pulleys are connected to one another by means of a rocker (1), a load hook being mounted in a pivotable manner on the rocker. If use is made here of two lifting cables, each of these lifting cables is led over a pulley block (2, 3) and, in order to achieve the same loading capability if use is made of just one lifting cable, the latter is led, in addition, over a floating pulley (2) which is mounted between the two pulley blocks (2, 3), the two pulley blocks (2, 3) also being secured against tilting.

Abstract: The invention relates to a bottom hook block system for a given maximum load, for providing differently portative bottom hook blocks for a crane, especially for a heavy lift crane. The bottom hook block system comprises four individual roller blocks (1a–d) with a plurality of pulley blocks, two load hooks (2a, b) and two intermediate links (3a, b) by means of which two individual roller blocks (1a, b or 1c, d) can be combined to a double roller block (4). An equalizing link unit (5) consists of two equalizing links (6, 7) that are interlinked via a joint support (8) with a vertical and at least one horizontal rotational axis. One of the equalizing links (6) is linked via a first horizontal hinge (10a, b) with the two intermediate links (3a, b). The other equalizing link (7) is linked via at least one bearing block (11a, b) with a second horizontal hinge (12a, b) with the two load hooks (2a, b). The load hooks (2a, b) can be swiveled about a vertical rotational axis in the respective bearing block (11a, b).

Abstract: The invention relates to a method of erecting or lowering a boom (4) of a mobile crane (1), comprising a crane carrier and, slewably arranged on said crane carrier (2), a superstructure (3), on which a boom (4) is luffably attached. With the erecting method according to the present invention the boom (4) is mounted on the superstructure (3) of the crane boom (1) in an essentially horizontal position. Then the boom (4) or the superstructure (3) is connected to a fixed foundation (21) which is anchored in the ground, and after this the boom (4) is erected to the desired luffed position while using the foundation (21) as a counterweight. For lowering the boom (4), the above steps basically have to be carried out in reversed order. The invention also relates to the use of a foundation (21) of a building under construction, such as a wind power station (20), and a mobile crane, in particular a lattice boom crane (1), suitable for carrying out the methods.

Abstract: The invention relates to a bottom hook block system for a given maximum load, for providing differently portative bottom hook blocks for a crane, especially for a heavy lift crane. The bottom hook block system comprises four individual roller blocks (1a-d) with a plurality of pulley blocks, two load hooks (2a, b) and two intermediate links (3a, b) by means of which two individual roller blocks (1a, b or 1c, d) can be combined to a double roller block (4). An equalizing link unit (5) consists of two equalizing links (6, 7) that are interlinked via a joint support (8) with a vertical and at least one horizontal rotational axis. One of the equalizing links (6) is linked via a first horizontal hinge (10a, b) with the two intermediate links (3a, b). The other equalizing link (7) is linked via at least one bearing block (11a, b) with a second horizontal hinge (12a, b) with the two load hooks (2a, b). The load hooks (2a, b) can be swiveled about a vertical rotational axis in the respective bearing block (11a, b).