EP2018341B1 - Mobile lift crane with lift enhancing attachment - Google Patents
Mobile lift crane with lift enhancing attachment Download PDFInfo
- Publication number
- EP2018341B1 EP2018341B1 EP07762113.4A EP07762113A EP2018341B1 EP 2018341 B1 EP2018341 B1 EP 2018341B1 EP 07762113 A EP07762113 A EP 07762113A EP 2018341 B1 EP2018341 B1 EP 2018341B1
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- EP
- European Patent Office
- Prior art keywords
- unit
- boom
- crane
- counterweight
- ground engaging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
Definitions
- the present application relates to lift cranes, and particularly to mobile lift cranes having attachments to increase the lift capacity of the crane.
- Enhancing the lift capacities of mobile lift cranes has been the subject of many improvements in the art of lift cranes over the years. Even with these improvements, there is still a need for further improvements, especially where the particular load to be lifted is very heavy, and other constraints associated with the load come into play, such as the need for the crane to be able to move over the ground while lifting the load.
- US 4, 537,317 discloses a heavy duty travel crane with two power driven mobile units each with an upper works pivotally supported by lower works and interconnected by a spreader link that may support a stack of counterweight.
- DE 1264010B discloses a mobile lift crane comprising a central crane unit, a boom unit and a counterweight unit.
- the present invention provides a mobile lift crane as set out in claim 1.
- a mobile lift crane has been invented which is capable of making very heavy lifts and still being mobile while lifting the load.
- the invention is a mobile lift crane comprising a central crane unit having a carbody, moveable ground engaging members and a rotating bed mounted to the ground engaging members with a rotatable connection such that the rotating bed can swing with respect to the ground engaging members; a boom unit having a support member, at least one moveable ground engaging member, and a boom pivotally mounted on the support member; a counterweight unit having counterweight on a support member; and rigging connecting the boom and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight.
- the boom unit and counterweight unit are connected to the central crane unit by structural members that carry compressive loads and maintain the boom unit, the rotating bed and the counterweight unit in lateral alignment with each other, but allow relative vertical movement between the boom unit, the rotating bed and the counterweight unit.
- a main mast is pivotally mounted on the boom unit.
- a mobile lift crane comprising a counterweight unit having a support member, counterweight, and at least two moveable ground engaging members, the support member being mounted to the ground engaging members with a rotatable connection such that the support member can swing with respect to the ground engaging members about a swing axis; a boom unit having a support member, at least two moveable ground engaging members, a boom pivotally mounted on the support member, and a main mast pivotally mounted on the support member; a structural member between the boom unit and the counterweight unit that can carry compressive loads and maintain the boom unit and the counterweight unit in lateral alignment with each other, but allow relative vertical movement between the boom unit and the counterweight unit; and rigging connecting the boom, mast and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight.
- the ground engaging members of the boom unit can be rotated relative to the boom unit support member such that the boom unit i) can travel in an arc around the swing axis and ii) travel in direction in line with the structural member
- the crane with a short boom and short radii will be able to lift approximately 2,000 metric ton.
- the capacity is approximately 800 metric ton. Even with the ability to lift these large loads, the crane is still mobile.
- the mobile lift crane 10 is made from three main units: a central crane unit 20, a boom unit 40 and a counterweight unit 60.
- the boom unit 40 and counterweight unit 60 are connected to the central crane unit 20 by structural members 82 and 84.
- the boom unit 40 and its structural member 82 are similar to a lift enhancing attachment that has been sold under the trademark "X-Tender” by Manitowoc Cranes of Manitowoc, Wisconsin.
- the counterweight unit 60 and its structural member 84 are similar to another lift enhancing attachment that has been sold under the trademark "MAX-ER” by Manitowoc Cranes.
- the central crane unit 20 includes a carbody 22, a rotating bed 23 and moveable ground engaging members in the form of crawlers 24.
- the rotating bed 23 is mounted to the carbody 22 with a rotatable connection, which may be rollers running on a roller path or a slewing ring, such that the rotating bed 23 can swing about a vertical axis with respect to the ground engaging members 24.
- the ground engaging members on the central crane unit comprise at least two crawlers.
- the central crane unit further includes a secondary mast 26 pivotally connected to the rotating bed 23. This mast is used primarily during set up to raise the main mast.
- the central crane unit 20 also includes other elements commonly found on a mobile lift crane, such as a live mast 28, back stops 30 and an operator's cab 32.
- the boom unit 40 includes a support member 42 and at least one moveable ground engaging member.
- the ground engaging member on the boom unit will typically comprise at least two crawlers.
- the boom unit has four moveable ground engaging members in the form of crawlers 44, in two sets of two crawlers each.
- crawlers or in this case, each set of crawlers
- Each of crawlers (or in this case, each set of crawlers) on the boom unit can be rotated about a vertical axis so that the boom unit can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit 20 (as shown in Figures 2 and 3 ) and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit (as shown in Figure 1 ).
- the boom unit also includes a boom 46 pivotally mounted on the support member 42, and a main mast 48 pivotally mounted on the support member 42.
- the boom 46 may comprises a main boom and a luffing jib 50 pivotally mounted to the top of the main boom.
- struts 51 and 53 are also used.
- the boom may be made from two independent lattice structures that are joined together at both their tops and bottoms by the pivotal support mechanism of the support member 42 and the luffing jib support on the top of the main boom.
- the counterweight unit 60 includes a counterweight (which may be in the form of two stacks 62 and 64 of individual counterweight members as shown) on a support member 66.
- the counterweight unit 60 further includes moveable ground engaging members in the form of multiple wheels 68.
- a second counterweight unit 61 designed for free-hanging use, is also included.
- the ground engaging members on the counterweight unit can be rotated about a vertical axis so that the counterweight unit can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit.
- the counterweight unit 61 may include a hydraulic cylinder (not shown) connected between the support member and the back hitch straps 54 that can be retracted to change the bearing of the counterweight from the ground to the back hitch straps as a load is lifted and counterweight is needed.
- a hydraulic cylinder (not shown) connected between the support member and the back hitch straps 54 that can be retracted to change the bearing of the counterweight from the ground to the back hitch straps as a load is lifted and counterweight is needed.
- the crane 10 also includes rigging connecting the boom 46, main mast 48 and counterweight unit 60 such that a load lifted by the boom 46 can be counterbalanced by the counterweight.
- the rigging includes boom hoist rigging 52 between the main mast 48 and the boom 46, allowing the boom angle with respect to the ground to be changed.
- the rigging also includes the back hitch straps 54.
- the back hitch straps in the embodiment shown are ultimately tied to the main mast 48, but may also be connected through the top of the secondary mast 26. In the embodiment shown there are two sets of back hitch straps 54, one tied to the counterweight unit 60 and one tied to the second counterweight unit 61. Another back hitch strap 58 is tied to the back of the central crane unit 20.
- This strap is also tied to the live mast 28 and is used to erect the secondary mast 26.
- Rigging 59 ( Figure 1 ) is used to change the angle between struts 51 and 53, and thus the angle of luffing jib 50 compared to the main boom.
- the structural members 82 and 84 carry compressive loads and maintain the boom unit 40, the rotating bed 23 and the counterweight unit 60 in lateral alignment with each other. However, these members are pinned so as to allow relative vertical movement between the boom unit 40, the rotating bed 23 and the counterweight unit 60.
- the structural member 82 may support one or more drums 86, 87 and 88 containing a load hoist line, luffing jib line 59 and boom hoist line, as well as engine module 90.
- FIGs 4 and 5 show a second embodiment of a crane 110 of the present invention.
- crane 110 includes three main units: a central crane unit 120, a boom unit 140 and a counterweight unit 160.
- the boom unit 140 and counterweight unit 160 are connected to the central crane unit 120 by structural members 182 and 184.
- Rigging 159 is used to change the angle between struts 151 and 153, and thus the angle of the luffing jib 150.
- Load hoist line and rigging drums, as well as an engine module, are mounted on the structural member 182.
- the mast back stop 186 shown in Figure 4 can also be used on crane 10.
- the primary difference in the crane 110 compared to crane 10 is that the moveable ground engaging members on the counterweight unit 160 comprise at least two crawlers 168.
- Figure 5 shows the crawlers 168 and the crawlers on the boom unit in the orientation for swinging about the central crane unit in phantom lines.
- FIGS 6 and 7 show another crane 210. This does not fall within the scope of the present invention but is included for background information.
- This crane is different than cranes 10 and 110 in that it has only two main units: a counterweight unit 260 and a boom unit 240.
- the counterweight unit is designed to have a central swing axis and the boom unit is configured so that it can either move in an arc about that swing axis, or travel in line with the crawlers on the counterweight unit.
- the counterweight unit 260 includes a support member 266, counterweight 262 and at least two moveable ground engaging members in the form of two crawlers 268.
- the support member 266 is mounted to the ground engaging members with a rotatable connection such that the support member 266 can swing with respect to the ground engaging members about a swing axis.
- the boom unit 240 includes a support member 242, at least two moveable ground engaging members, in this case four crawlers 244, a boom 246 pivotally mounted on the support member 242, and a main mast 248 pivotally mounted on the support member.
- a structural member 282 extends between the boom unit and the counterweight unit, and can carry compressive loads and maintain the boom unit and the counterweight unit in lateral alignment with each other, but allows relative vertical movement between the boom unit and the counterweight unit.
- the crane 210 also includes rigging connecting the boom, mast and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight.
- the ground engaging members 244 of the boom unit can be rotated relative to the boom unit support member such that the boom unit i) can travel in an arc around the swing axis of the counterweight unit (as shown in phantom lines in Figure 7 ) and ii) travel in direction in line with the structural member 282.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Description
- The present application relates to lift cranes, and particularly to mobile lift cranes having attachments to increase the lift capacity of the crane.
- Enhancing the lift capacities of mobile lift cranes has been the subject of many improvements in the art of lift cranes over the years. Even with these improvements, there is still a need for further improvements, especially where the particular load to be lifted is very heavy, and other constraints associated with the load come into play, such as the need for the crane to be able to move over the ground while lifting the load.
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US 4, 537,317 discloses a heavy duty travel crane with two power driven mobile units each with an upper works pivotally supported by lower works and interconnected by a spreader link that may support a stack of counterweight. -
DE 1264010B discloses a mobile lift crane comprising a central crane unit, a boom unit and a counterweight unit. - The present invention provides a mobile lift crane as set out in claim 1. A mobile lift crane has been invented which is capable of making very heavy lifts and still being mobile while lifting the load. In a first aspect, the invention is a mobile lift crane comprising a central crane unit having a carbody, moveable ground engaging members and a rotating bed mounted to the ground engaging members with a rotatable connection such that the rotating bed can swing with respect to the ground engaging members; a boom unit having a support member, at least one moveable ground engaging member, and a boom pivotally mounted on the support member; a counterweight unit having counterweight on a support member; and rigging connecting the boom and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight. The boom unit and counterweight unit are connected to the central crane unit by structural members that carry compressive loads and maintain the boom unit, the rotating bed and the counterweight unit in lateral alignment with each other, but allow relative vertical movement between the boom unit, the rotating bed and the counterweight unit. A main mast is pivotally mounted on the boom unit.
- Also described is a mobile lift crane comprising a counterweight unit having a support member, counterweight, and at least two moveable ground engaging members, the support member being mounted to the ground engaging members with a rotatable connection such that the support member can swing with respect to the ground engaging members about a swing axis; a boom unit having a support member, at least two moveable ground engaging members, a boom pivotally mounted on the support member, and a main mast pivotally mounted on the support member; a structural member between the boom unit and the counterweight unit that can carry compressive loads and maintain the boom unit and the counterweight unit in lateral alignment with each other, but allow relative vertical movement between the boom unit and the counterweight unit; and rigging connecting the boom, mast and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight. The ground engaging members of the boom unit can be rotated relative to the boom unit support member such that the boom unit i) can travel in an arc around the swing axis and ii) travel in direction in line with the structural member.
- With one embodiment of the lift crane of the present invention, the crane with a short boom and short radii will be able to lift approximately 2,000 metric ton. In a configuration like that shown in the attached
Figures 1-3 , the capacity is approximately 800 metric ton. Even with the ability to lift these large loads, the crane is still mobile. - These and other advantages of the invention, as well as the invention itself, will be more easily understood in view of the attached drawings.
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Figure 1 is a perspective view of a first embodiment of a mobile lift crane with lift enhancing attachments. -
Figure 2 is a partial perspective view of the mobile lift crane ofFigure 1 with some elements removed for sake of clarity. -
Figure 3 is a top plan view of the mobile lift crane ofFigure 1 with some elements removed for sake of clarity. -
Figure 4 is a side elevational view of a second embodiment of a mobile lift crane of the present invention. -
Figure 5 is a top plan view of the crane ofFigure 4 with some elements removed for sake of clarity. -
Figure 6 is a side elevational view of another mobile lift crane, although not within the scope of the present invention. -
Figure 7 is a top plan view of the crane ofFigure 6 with some elements removed for sake of clarity. - The present invention will now be further described. In the following passages, different aspects of the invention are defined in more detail. Each aspect so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.
- Two embodiments of the invention are shown in the attached drawings. In the first embodiment, shown in
Figures 1-3 , themobile lift crane 10 is made from three main units: acentral crane unit 20, aboom unit 40 and acounterweight unit 60. Theboom unit 40 andcounterweight unit 60 are connected to thecentral crane unit 20 bystructural members boom unit 40 and itsstructural member 82 are similar to a lift enhancing attachment that has been sold under the trademark "X-Tender" by Manitowoc Cranes of Manitowoc, Wisconsin. Thecounterweight unit 60 and itsstructural member 84 are similar to another lift enhancing attachment that has been sold under the trademark "MAX-ER" by Manitowoc Cranes. However, up until the present invention, it is believed that no one had ever combined the two attachment concepts to achieve a very high lift capacity crane. Having the swing axis longitudinally located between the combined enhancing devices is unique and non-obvious. Because many features of the boom unit, central crane unit and counterweight unit are the same as in cranes and these attachments, they will not be described in detail herein. - The
central crane unit 20 includes acarbody 22, a rotatingbed 23 and moveable ground engaging members in the form ofcrawlers 24. The rotatingbed 23 is mounted to thecarbody 22 with a rotatable connection, which may be rollers running on a roller path or a slewing ring, such that the rotatingbed 23 can swing about a vertical axis with respect to theground engaging members 24. In thecrane 10, the ground engaging members on the central crane unit comprise at least two crawlers. The central crane unit further includes asecondary mast 26 pivotally connected to the rotatingbed 23. This mast is used primarily during set up to raise the main mast. Thecentral crane unit 20 also includes other elements commonly found on a mobile lift crane, such as alive mast 28, back stops 30 and an operator'scab 32. - The
boom unit 40 includes asupport member 42 and at least one moveable ground engaging member. The ground engaging member on the boom unit will typically comprise at least two crawlers. In the embodiment shown, the boom unit has four moveable ground engaging members in the form ofcrawlers 44, in two sets of two crawlers each. Each of crawlers (or in this case, each set of crawlers) on the boom unit can be rotated about a vertical axis so that the boom unit can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit 20 (as shown inFigures 2 and3 ) and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit (as shown inFigure 1 ). - The boom unit also includes a
boom 46 pivotally mounted on thesupport member 42, and amain mast 48 pivotally mounted on thesupport member 42. Theboom 46 may comprises a main boom and aluffing jib 50 pivotally mounted to the top of the main boom. When aluffing jib 50 is included,struts support member 42 and the luffing jib support on the top of the main boom. - The
counterweight unit 60 includes a counterweight (which may be in the form of twostacks support member 66. Thecounterweight unit 60 further includes moveable ground engaging members in the form ofmultiple wheels 68. In the embodiment shown asecond counterweight unit 61, designed for free-hanging use, is also included. The ground engaging members on the counterweight unit can be rotated about a vertical axis so that the counterweight unit can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit. Thecounterweight unit 61 may include a hydraulic cylinder (not shown) connected between the support member and theback hitch straps 54 that can be retracted to change the bearing of the counterweight from the ground to the back hitch straps as a load is lifted and counterweight is needed. - The
crane 10 also includes rigging connecting theboom 46,main mast 48 andcounterweight unit 60 such that a load lifted by theboom 46 can be counterbalanced by the counterweight. The rigging includes boom hoist rigging 52 between themain mast 48 and theboom 46, allowing the boom angle with respect to the ground to be changed. The rigging also includes theback hitch straps 54. The back hitch straps in the embodiment shown are ultimately tied to themain mast 48, but may also be connected through the top of thesecondary mast 26. In the embodiment shown there are two sets ofback hitch straps 54, one tied to thecounterweight unit 60 and one tied to thesecond counterweight unit 61. Anotherback hitch strap 58 is tied to the back of thecentral crane unit 20. This strap is also tied to thelive mast 28 and is used to erect thesecondary mast 26. Rigging 59 (Figure 1 ) is used to change the angle betweenstruts jib 50 compared to the main boom. - The
structural members boom unit 40, the rotatingbed 23 and thecounterweight unit 60 in lateral alignment with each other. However, these members are pinned so as to allow relative vertical movement between theboom unit 40, the rotatingbed 23 and thecounterweight unit 60. Thestructural member 82 may support one ormore drums jib line 59 and boom hoist line, as well asengine module 90. -
Figures 4 and5 show a second embodiment of acrane 110 of the present invention. Like thecrane 10,crane 110 includes three main units: acentral crane unit 120, aboom unit 140 and acounterweight unit 160. Theboom unit 140 andcounterweight unit 160 are connected to thecentral crane unit 120 bystructural members struts jib 150. Load hoist line and rigging drums, as well as an engine module, are mounted on thestructural member 182. The mast back stop 186 shown inFigure 4 can also be used oncrane 10. The primary difference in thecrane 110 compared tocrane 10 is that the moveable ground engaging members on thecounterweight unit 160 comprise at least twocrawlers 168.Figure 5 shows thecrawlers 168 and the crawlers on the boom unit in the orientation for swinging about the central crane unit in phantom lines. -
Figures 6 and7 show anothercrane 210. This does not fall within the scope of the present invention but is included for background information. This crane is different thancranes counterweight unit 260 and aboom unit 240. In thiscrane, the counterweight unit is designed to have a central swing axis and the boom unit is configured so that it can either move in an arc about that swing axis, or travel in line with the crawlers on the counterweight unit. - The
counterweight unit 260 includes asupport member 266,counterweight 262 and at least two moveable ground engaging members in the form of twocrawlers 268. Thesupport member 266 is mounted to the ground engaging members with a rotatable connection such that thesupport member 266 can swing with respect to the ground engaging members about a swing axis. - The
boom unit 240 includes asupport member 242, at least two moveable ground engaging members, in this case four crawlers 244, aboom 246 pivotally mounted on thesupport member 242, and amain mast 248 pivotally mounted on the support member. Astructural member 282 extends between the boom unit and the counterweight unit, and can carry compressive loads and maintain the boom unit and the counterweight unit in lateral alignment with each other, but allows relative vertical movement between the boom unit and the counterweight unit. Thecrane 210 also includes rigging connecting the boom, mast and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight. Theground engaging members 244 of the boom unit can be rotated relative to the boom unit support member such that the boom unit i) can travel in an arc around the swing axis of the counterweight unit (as shown in phantom lines inFigure 7 ) and ii) travel in direction in line with thestructural member 282. - It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. The drums for the hoist line and rigging could be mounted on the rotating bed of the central crane unit. Such changes and modifications can be made without departing from the scope of the present invention and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.
Claims (15)
- A mobile lift crane (10) comprising:a) a central crane unit (20) having a carbody (22), moveable ground engaging members (24) and a rotating bed (23) mounted to the carbody (22) with a rotatable connection such that the rotating bed (23) can swing with respect to the moveable ground engaging members (24), the moveable ground engaging members being configured to allow the central crane unit to move over the ground while the crane is lifting a load;b) a boom unit (40) having a boom support member (42), a boom (46) pivotally mounted on the boom support member (42), and at least one moveable ground engaging member (44) mounted on the boom support member (42) so that the weight of the boom (46) is supported by the boom unit moveable ground engaging member (44), and whereby the boom (46), boom support member (42) and boom unit moveable ground engaging member (44) all travel together as a single unit;c) a counterweight unit (60) having counterweight (62, 64) on a counterweight support member (66) and moveable ground engaging members mounted on the counterweight support member (66); andd) rigging connecting the boom (46) and counterweight unit (60) such that a load lifted by the boom (46) can be counterbalanced by the counterweight (62, 64);e) wherein the boom unit (40) is connected to the central crane unit (20) by a first structural member (82) and the counterweight unit (60) is connected to the central crane unit (20) by a second structural member (84), wherein both the first and second structural members (82, 84) carry compressive loads and maintain the boom unit (40), the rotating bed (23) and the counterweight unit (60) in lateral alignment with each other, but allow relative vertical movement between the boom unit (40), the rotating bed (23) and the counterweight unit (60), and wherein the crane (10) further comprises a main mast (48) pivotally mounted on the boom unit (40).
- The mobile lift crane (10) of claim 1 wherein the moveable ground engaging members (24) on the central crane unit (20) comprise at least two crawlers.
- The mobile lift crane (10) of claim 1 or claim 2 wherein the moveable ground engaging members (68) on the counterweight unit (60) comprise a plurality of wheels.
- The mobile lift crane (10) of claim 1 or claim 2 wherein the moveable ground engaging members (68) on the counterweight unit (60) comprise at least two crawlers.
- The mobile lift crane (10) of any one of claims 1 to 4 wherein the main mast (48) is pivotally mounted on the boom support member (42) of the boom unit (40).
- The mobile lift crane (10) of claim 6 wherein the central crane unit (20) further comprises a secondary mast (26) pivotally connected to the rotating bed (23).
- The mobile lift crane (10) of any one of claims 1 to 6 wherein each of the moveable ground engaging members (44) on the boom unit (40) can be rotated about a vertical axis so that the boom unit (40) can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit (20) and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit (20).
- The mobile lift crane (10) of any one of claims 1 to 7 further comprising a drum (86, 87, 88) containing a load hoist line, the drum (86, 87, 88) being mounted on the first structural member (82).
- The mobile lift crane (10) of any one of claims 1 to 8 wherein the rigging comprises i) boom hoist rigging (52) between the main mast (48) and the boom (46) allowing the boom angle to be changed and ii) back hitch straps (54) between the main mast (48) and the counterweight unit (60).
- The mobile lift crane (10) of any one of claims 1 to 9 further comprising a second counterweight unit (61) configured for free-hanging use.
- The mobile lift crane (10) of any one of claims 1 to 10 wherein the moveable ground engaging members (68) on the counterweight unit (60) can be rotated about a vertical axis so that the counterweight unit (60) can travel in both i) an arc around the axis of the rotatable swing connection of the central crane unit (20) and ii) a lateral direction corresponding to a linear direction of travel of the central crane unit (20).
- The mobile lift crane (10) of any one of claims 1 to 11 wherein the at least one moveable ground engaging member (44) on the boom unit (40) comprise at least two crawlers.
- The mobile lift crane (10) of claim 12 wherein the at least two crawlers on the boom unit (40) comprise two sets of two crawlers each.
- The mobile lift crane (10) of any one of claims 1 to 13 wherein the boom (46) comprises a main boom and a luffing jib (50) pivotally mounted to the top of the main boom.
- The mobile lift crane (10) of any one of claims 1 to 14 wherein the boom (46) comprises two independent lattice structures that are joined together at both their tops and bottoms.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79991506P | 2006-05-12 | 2006-05-12 | |
PCT/US2007/068738 WO2007134211A2 (en) | 2006-05-12 | 2007-05-11 | Mobile lift crane with lift enhancing attachment |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2018341A2 EP2018341A2 (en) | 2009-01-28 |
EP2018341A4 EP2018341A4 (en) | 2012-11-14 |
EP2018341B1 true EP2018341B1 (en) | 2015-10-28 |
Family
ID=38694722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07762113.4A Active EP2018341B1 (en) | 2006-05-12 | 2007-05-11 | Mobile lift crane with lift enhancing attachment |
Country Status (7)
Country | Link |
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EP (1) | EP2018341B1 (en) |
KR (1) | KR20090018034A (en) |
CN (1) | CN101460386B (en) |
BR (1) | BRPI0711454A2 (en) |
MX (1) | MX2008014122A (en) |
RU (1) | RU2445251C2 (en) |
WO (1) | WO2007134211A2 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008004663U1 (en) * | 2008-04-04 | 2009-08-13 | Liebherr-Werk Ehingen Gmbh | Lattice boom crane and lattice boom |
CN201626782U (en) * | 2009-12-24 | 2010-11-10 | 三一电气有限责任公司 | Amphibious crawler crane |
CN102234076B (en) * | 2010-04-22 | 2013-04-24 | 上海三一科技有限公司 | Electrical control device for crawler-type counter weight trolley and control method thereof |
WO2013044485A1 (en) * | 2011-09-29 | 2013-04-04 | 长沙中联重工科技发展股份有限公司 | Counterweight balancing mechanism and dual arm crane |
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DE1264010B (en) * | 1966-04-28 | 1968-03-21 | Gross G M B H A | Crane system for large load capacities and load moments |
US3868022A (en) * | 1973-11-23 | 1975-02-25 | Harnischfeger Corp | Self-propelled heavy duty mobile crane |
US4382519A (en) * | 1979-07-17 | 1983-05-10 | The Manitowoc Company, Inc. | Traveling attachment for ring supported lift crane |
US4387814A (en) * | 1981-09-08 | 1983-06-14 | The Manitowoc Company, Inc. | Traveling attachment for ring supported lift crane |
US4579234A (en) * | 1984-03-16 | 1986-04-01 | American Hoist & Derrick Company | Self-erecting mobile crane |
US4537317A (en) * | 1984-04-23 | 1985-08-27 | Fmc Corporation | Heavy duty travel crane |
SU1370057A1 (en) * | 1986-06-02 | 1988-01-30 | Новосибирский Филиал Всесоюзного Института По Проектированию Организации Энергетического Строительства "Оргэнергострой" | Self-propelled cargo-hoisting crane |
JP3424616B2 (en) * | 1999-09-09 | 2003-07-07 | コベルコ建機株式会社 | Crawler traveling work machine |
CN2741949Y (en) * | 2004-10-27 | 2005-11-23 | 万维柔 | Automatic balance crane device |
-
2007
- 2007-05-11 EP EP07762113.4A patent/EP2018341B1/en active Active
- 2007-05-11 WO PCT/US2007/068738 patent/WO2007134211A2/en active Application Filing
- 2007-05-11 MX MX2008014122A patent/MX2008014122A/en not_active Application Discontinuation
- 2007-05-11 CN CN2007800171855A patent/CN101460386B/en active Active
- 2007-05-11 KR KR1020087026035A patent/KR20090018034A/en not_active Application Discontinuation
- 2007-05-11 BR BRPI0711454-0A patent/BRPI0711454A2/en not_active IP Right Cessation
- 2007-05-11 RU RU2008149047/11A patent/RU2445251C2/en not_active IP Right Cessation
Also Published As
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JP2009536909A (en) | 2009-10-22 |
CN101460386B (en) | 2012-09-05 |
RU2008149047A (en) | 2010-06-20 |
EP2018341A4 (en) | 2012-11-14 |
RU2445251C2 (en) | 2012-03-20 |
EP2018341A2 (en) | 2009-01-28 |
JP5331682B2 (en) | 2013-10-30 |
WO2007134211A2 (en) | 2007-11-22 |
WO2007134211A3 (en) | 2008-11-06 |
MX2008014122A (en) | 2008-11-14 |
BRPI0711454A2 (en) | 2011-11-08 |
KR20090018034A (en) | 2009-02-19 |
CN101460386A (en) | 2009-06-17 |
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