# US 10,246,310 B2 · Large mobile crane > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,310 B2 - Document ID: US10246310B2 - Status: Granted - Kind: B2 - Application number: 14/171,008 - Filed: 2014-02-03 - Published: 2014-07-31 - Granted: 2019-04-02 - Earliest claimed: 2005-11-17 - Assignees: Terex Global GmbH - Applicants: Terex Cranes Germany GmbH - Inventors: Rüdiger Zollondz; Alfons Weckbecker; Fritz-Botho Köster; Günter Karp; Hans-Peter Franzen - Web page: https://patentgrep.com/patent/US10246310B2 ## CPC - B66C 23/62: Constructional features or details (of dredgers E02F) - B62D 21/186: {for building site vehicles or multi-purpose tractors (tracked vehicles B62D55/10; tractors in general B62D49/00; building site vehicles in general E02F; lift-trucks B66F)} - B62D 55/065: Multi-track vehicles, i.e. more than two tracks {(soil-shifting machines E02F; mining machines E21C)} - B66C 23/36: mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes (with pneumatic or hydraulic motors B66C23/54; vehicle or ship aspects B60 - B63) - B66C: CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21) - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## 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. ## Claims ### Claim 1 Large mobile crane comprising an undercarriage, wherein the undercarriage comprises a middle section between tracks, wherein a distance between the tracks can be increased or decreased by the insertion or removal of expansion parts, said two tracks connected on opposite sides of the undercarriage to permit movement of the large mobile crane, 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, wherein said counterweights are either arranged separately of or mounted on the undercarriage, and wherein the large mobile crane further comprises 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. ### Claim 2 (depends on 1) Large mobile crane according to claim 1, wherein the at least two main booms are mounted symmetrically with respect to each other on the superstructure, the booms being connected to each other by connecting elements so that they are rigid with respect to moments. ### Claim 3 (depends on 1) Large mobile crane according to claim 1, wherein the counterweights are arranged both separately and on the undercarriage. ### Claim 4 (depends on 1) Large mobile crane according to claim 1, wherein the main booms are paired with derrick booms, which are connected to each other by connecting elements. ### Claim 5 (depends on 1) Large mobile crane according to claim 1, wherein the undercarriage is a crawler undercarriage and the two tracks are crawler tracks. ### Claim 6 (depends on 5) Large mobile crane according to claim 5, wherein the crawler undercarriage comprises a pair of crawler carriers, which can be lengthened or shortened in modular fashion by the insertion or removal of intermediate pieces. ### Claim 7 (depends on 6) Large mobile crane according to claim 6, wherein the crawler carriers are lengthened or shortened along a driving direction, which is defined by the crawler carriers. ### Claim 8 (depends on 1) Large mobile crane according to claim 1, wherein the at least two main booms are arranged next to each other on the superstructure and are connected to each other so that they are rigid with respect to moments, and wherein the main booms are paired with at least two derrick booms. ### Claim 9 (depends on 1) Large mobile crane according to claim 1, wherein the undercarriage has crawler-type tracks arranged one behind the other or with an offset. ### Claim 10 (depends on 1) Large mobile crane according to claim 1, further comprising a pair of bottom hook blocks which are combined with each other by means of a connecting crosspiece. ### Claim 11 (depends on 1) A kit comprising: the large mobile crane according to claim 1, wherein the undercarriage further comprises crawler carriers, each surrounded by a respective one of the tracks, intermediate pieces configured to be selectively inserted in a crawler carrier of each track, wherein each of the crawler carriers is divided into a front crawler carrier part and a rear crawler carrier part configured to result in a first footprint and to support the respective one of the tracks and arranged in a longitudinal direction of the crawler carriers, wherein at least one of the intermediate pieces, when in use, is inserted between the front crawler carrier part and the rear crawler carrier part of each of the crawler carriers, thereby elongating the crawler carriers which are each surrounded by an elongated crawler track, and wherein said elongated crawler carriers provide a second footprint of the large mobile crane, the second footprint being larger than the first footprint. ### Claim 12 (depends on 11) Large mobile crane according to claim 11, wherein at least one of said expansion parts is arranged between the middle section and one of the tracks. ### Claim 13 (depends on 11) Large mobile crane according to claim 11, wherein the distance between the tracks to be increased or decreased by the insertion or removal of the expansion parts is oriented perpendicularly to a driving direction of the crane, wherein the driving direction is defined by the tracks. ### Claim 14 (depends on 11) Large mobile crane according to claim 11, wherein the crawler carriers are lengthened or shortened along a driving direction, which is defined by the crawler carriers. ### Claim 15 (depends on 1) Large mobile crane according claim 1, wherein the whole circular track is completely arranged on the expansion parts. ### Claim 16 (depends on 1) Large mobile crane according claim 1, wherein the circular track surrounds the middle section, such that the circular track is spaced apart from the middle section. ### Claim 17 (depends on 1) Large mobile crane according to claim 1, wherein at least one of said expansion parts is arranged between the middle section and one of the tracks. ### Claim 18 (depends on 1) Large mobile crane according to claim 1, wherein the distance between the tracks to be increased or decreased by the insertion or removal of the expansion parts is oriented perpendicularly to a driving direction of the crane, wherein the driving direction is defined by the tracks. ### Claim 19 (depends on 1) A large mobile crane according to claim 1, wherein the undercarriage further comprises crawler carriers, each surrounded by a respective one of the tracks, intermediate pieces configured to be selectively inserted in a crawler carrier of each track, wherein each of the crawler carriers is formed by a front crawler carrier part and a rear crawler carrier part configured to result in a first footprint and to support the respective one of the tracks and arranged in a longitudinal direction of the crawler carriers, wherein elongated crawler carriers are formed by inserting at least one of the intermediate pieces between the front crawler carrier part and the rear crawler carrier part of each of the crawler carriers thereby the elongated crawler carriers each being surrounded by an elongated crawler track, and wherein said elongated crawler carriers provide a second footprint of the large mobile crane, the second footprint being larger than the first footprint.