WO1989002410A1 - Articulated jib crane capable of reaching areas behind an obstacle - Google Patents

Articulated jib crane capable of reaching areas behind an obstacle Download PDF

Info

Publication number
WO1989002410A1
WO1989002410A1 PCT/IT1988/000004 IT8800004W WO8902410A1 WO 1989002410 A1 WO1989002410 A1 WO 1989002410A1 IT 8800004 W IT8800004 W IT 8800004W WO 8902410 A1 WO8902410 A1 WO 8902410A1
Authority
WO
WIPO (PCT)
Prior art keywords
crane
bucket
elements
accordance
base structure
Prior art date
Application number
PCT/IT1988/000004
Other languages
French (fr)
Inventor
Sergio Cella
Original Assignee
Cella S.P.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cella S.P.A. filed Critical Cella S.P.A.
Publication of WO1989002410A1 publication Critical patent/WO1989002410A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
    • E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type

Definitions

  • the present invention concerns a crane having a mechanical boom for movement of an aerial platform or an aerial work bucket, for use particularly in reaching areas that are normally inaccessible being situated behind an unmovable obstacle, capable for example of inspecting the framework of a bridge or a viaduct when the crane is positioned on the viaduct itself.
  • building works, especially large communications structures require periodic structural checks, as well as maintenance work. Said structures are in fact exposed to atmospheric assaults that can jeopardise their safety in the long term. Because of the great size of these structures, special equipment must be used for inspection and repair operations, such as scaffolding and aerial work platforms or buckets.
  • the aim of the invention is to provide a crane capable of allowing an aerial work bucket to reach positions hitherto inaccessible due to the presence of obstacles: in particular a crane capable of serving large areas situated below or above its rest surface.
  • the aim has been achieved by inserting, at an intermediate point of the boom supporting an aerial platform, a pivot means that allows rotation (preferably 360°) around an axis contained in the plane of the boom.
  • the crane normally consists of a base structure and articulated mechanical boom made up of two different elements connected to each other by means of an articulating mechanism that allows the two elements to rotate reciprocally around an axis perpendicular to the plane containing the two elements themselves, the first element, called the main lifting boom, placed nearer to the base structure and constrained, with suitable degrees of freedom, to said structure, while the other element, called the jib, supports an orientable bucket at its free end.
  • the first element (main boom) is connected to a base structure mounted on a motor vehicle or resting on the ground, by means of a drive mechanism while a pivot means allows 360° rotation around an axis perpendicular to the surface on which the base structure rests.
  • the drive mechanism preferably also comprises a chassis that can be tilted by means of double-acting hydraulic cylinders that allow approximately 160° rotation of said tilting chassis.
  • the base structure can be equipped with hydraulic stabilizers mounted on extending cross-beams, in order to ensure the necessary equipment stability.
  • the articulating mechanism between the two elements is a mechanism comprising four articulated joints.
  • the first and second elements are preferably telescopic.
  • the elements making up the boom are preferably extracted by means of double-acting hydraulic cylinders and chain transmissions disposed inside the arms themselves.
  • a lifting device is preferably provided between the bucket and the 15. point of attachment to the outermost element (jib).
  • this bucket lifting device consists of a telescopically extending assembly controlled by a hydraulic cylinder and by a set of chains and pulleys.
  • Orientation of the bucket is preferably provided for by an 20. electrohydraulic device.
  • a special small arm is preferably provided, driven by a double-acting hydraulic cylinder and having an angular movement of about 90°.
  • a mechanical boom thus articulated serves an extremely large working area, being able to reach areas situated behind an obstacle that the crane is unable to overcome.
  • the mechanical boom according to the invention is particularly suitable for inspection of bridges: with the support remaining on the roadway, the actuating mechanism 10. provided on the base structure takes the elements (main boom and jib) beyond the framework of the bridge, the first element, preferably telescopic, lowers the point of articulation to the desired height on the outside of the bridge and the second element, preferably also telescopic, moves the bucket horizontally to the area of the 15. framework that is to be inspected; lastly, the bucket lifting device takes the bucket to the desired point between the beams of said framework.
  • the small arm will be rotated with respect to the jib axis so that bucket and jib arm do not hinder
  • Figs. 1a and 1b are schematic views of respectively a rear and a side view of a device in accordance with the invention mounted 25 . on a truck;
  • Fig. 2 is a view of the same device shown in figure 1 installed on the roadway of a bridge;
  • Figs. 3a, 3b and 3c show respectively a front, side and plan view of the bucket lift assembly; 5.
  • Fig. 4 shows in detail the pivot means between the telescopic elements (main boom and jib);
  • Fig. 5 shows the upward movement of the boom in figure 1
  • Fig. 6 shows the downward movement of the boom in figure 1.
  • rigures 1a, 1b and 2 show a mechanical boom, mounted on a truck 22 in 10. the transport position (figs . 1a and 1b) , i. e. occupying the least possible space, and in the working position (fig. 2) on the roadway of a bridge structure 30 (seen in cross section).
  • the crane is made up of a base structure, immovably installed on the chassis of the truck 22, said base structure having a turret 4 rotably mounted on a 15. pivot means with 360° rotation.
  • Said structure 1 is also equipped with hydraulic stabilizers, mounted on extending cross-beams 3, to ensure the necessary equipment stability.
  • the turret 4 supports a tilting-type chassis 5, one end of which is pivoted along the periphery of said turret 4, while the other end 20. supports a first element (telescopically extending main bocm 8).
  • the tilting chassis 5 is operated by a pair of double-acting hydraulic cylinders 6.
  • the outermost end 8a (figure 2) of the element 8 is connected to a toothed pivot means preferably having a double crown of balls (shown
  • said pivot means being driven by a hydraulic geared motor 18 by means of a pinion gear 17 that allows continuous 360° rotation between said element 8 and a second element 10 normally called the jib.
  • This second element is connected to the pivot means 16 by means of a four-hinged articulating mechanism 20 controlled by
  • means 16 To the rotating part of the pivot, means 16 is fixed a plate 23 to which are articulated both the second telescopically extending element 10 and a lever 20a that is operated by the cylinder 15.
  • Another lever 20b is articulated at one of its ends to lever 20a and to the cylinder 15 and at its 10. other end to the second element 10.
  • the mechanism 20 allows an opening of about 160° between the two elements 8 and 10.
  • the element 8 acts as the main boom and the element 10 acts as the jib; the telescopic extensions of both elements 8 and 10 are extracted by means of double-acting hydraulic cylinders with chain 15. drives situated inside the elements themselves (not shown in the figures).
  • a work platform or bucket 12 is supported at the extending end of element 10, with a hydraulic orientation device 21 and a vertical lifting assembly 13.
  • the bucket 12 and the element 10 are connected 20. by means of a special small arm 19 operated by a double-acting hydraulic cylinder.
  • the device 13 shown in detail in figures 3a, 3b and 3c, comprises an element 34, connected to the orientation device 21, mounting a hydraulic cylinder 27 the piston of which is connected to a first 25. extending element 33.
  • Fleyer-type lifting chains 51 one end 51 of which is fixed to element 34 while the other end is fixed to a second extending element 52, run on idle pulleys and provide for extraction of said element 32.
  • chains 54 run on idle pulleys 55 and extract a third element 31 integral with the bucket 12.
  • the elements 8 and 10 are preferably provided with triple telescopic extension.
  • FIG. 12' indicates the upper hatched position of the bucket 12.
  • the main boom and jib, articulated as described above, have 10. sufficient movement to meet the most varied requirements as regards distance and height. They can take on particularly advantageous projecting positions for inspections beneath bridges (as shown in figure 6) or in any event for inspecting areas beyond an obstacle.
  • the orientation device 21 which allows the bucket 12 to be kept level at all times, and the small arm 19 are also of considerable importance in the vast boom movement described.
  • element 10 when element 10 is horizontal, if said element 10 is bent further upwards the orientation device 21 will no longer be sufficient to keep the bucket 12 horizontal, since the mechanical suspending parts will be of impediment; this is where the small arm 19, driven by the cylinder 19a and having an angular movement of about 90°, comes into play to lower the bucket while keeping it in a horizontal position.

Abstract

The proposed crane has a mechanical boom comprising, at an intermediate point, an articulating mechanism (20) and a pivot means (16) that allows complete 360° rotation. Said pivot means connects two distinct elements, preferably telescopic (8 and 10) with one or more extensions, a first element (8), nearer to the base structure (1) being constrained with suitable degrees of freedom to the base structure (1), the other element (10) supporting an orientable bucket (12). In a preferred embodiment the element (8) nearest the base structure is connected to the latter by means of a tilting chassis (5) and a pivot means (9) with 360° rotation, while the bucket (12) can be made to travel vertically with respect to its point of attachment to the element (10) farthest from the base structure (1).

Description

"ARTICULATED JIB CRANE CAPABLE OF REACHING AREAS BEHIND AN OBSTACLE"
The present invention concerns a crane having a mechanical boom for movement of an aerial platform or an aerial work bucket, for use particularly in reaching areas that are normally inaccessible being situated behind an unmovable obstacle, capable for example of inspecting the framework of a bridge or a viaduct when the crane is positioned on the viaduct itself. building works, especially large communications structures, require periodic structural checks, as well as maintenance work. Said structures are in fact exposed to atmospheric assaults that can jeopardise their safety in the long term. Because of the great size of these structures, special equipment must be used for inspection and repair operations, such as scaffolding and aerial work platforms or buckets.
Known cranes having mechanical booms that support an aerial work bucket generally permit lifting and rotational movements around vertical axis of said bucket. A special requirement involving a number of problems is inspection and repair of bridges, for example; these structures do not normally afford ground access from a position beneath the bridge, nor a safe resting surface in these areas. Special high-cost equipment would therefore have to be installed for said inspections.
The aim of the invention is to provide a crane capable of allowing an aerial work bucket to reach positions hitherto inaccessible due to the presence of obstacles: in particular a crane capable of serving large areas situated below or above its rest surface.
The aim has been achieved by inserting, at an intermediate point of the boom supporting an aerial platform, a pivot means that allows rotation (preferably 360°) around an axis contained in the plane of the boom. The crane normally consists of a base structure and articulated mechanical boom made up of two different elements connected to each other by means of an articulating mechanism that allows the two elements to rotate reciprocally around an axis perpendicular to the plane containing the two elements themselves, the first element, called the main lifting boom, placed nearer to the base structure and constrained, with suitable degrees of freedom, to said structure, while the other element, called the jib, supports an orientable bucket at its free end.
The first element (main boom) is connected to a base structure mounted on a motor vehicle or resting on the ground, by means of a drive mechanism while a pivot means allows 360° rotation around an axis perpendicular to the surface on which the base structure rests.
The drive mechanism preferably also comprises a chassis that can be tilted by means of double-acting hydraulic cylinders that allow approximately 160° rotation of said tilting chassis.
5. The base structure can be equipped with hydraulic stabilizers mounted on extending cross-beams, in order to ensure the necessary equipment stability.
The articulating mechanism between the two elements (main boom and jib) is a mechanism comprising four articulated joints.
10. The first and second elements (main boom and jib) are preferably telescopic. The elements making up the boom are preferably extracted by means of double-acting hydraulic cylinders and chain transmissions disposed inside the arms themselves.
A lifting device is preferably provided between the bucket and the 15. point of attachment to the outermost element (jib).
in particular this bucket lifting device consists of a telescopically extending assembly controlled by a hydraulic cylinder and by a set of chains and pulleys.
Orientation of the bucket is preferably provided for by an 20. electrohydraulic device.
To allow the bucket to remain parallel to the ground even when the jib is configured with an upward or downward inclination with respect to the horizontal position, a special small arm is preferably provided, driven by a double-acting hydraulic cylinder and having an angular movement of about 90°.
A mechanical boom thus articulated serves an extremely large working area, being able to reach areas situated behind an obstacle that the crane is unable to overcome. The mechanical boom according to the invention is particularly suitable for inspection of bridges: with the support remaining on the roadway, the actuating mechanism 10. provided on the base structure takes the elements (main boom and jib) beyond the framework of the bridge, the first element, preferably telescopic, lowers the point of articulation to the desired height on the outside of the bridge and the second element, preferably also telescopic, moves the bucket horizontally to the area of the 15. framework that is to be inspected; lastly, the bucket lifting device takes the bucket to the desired point between the beams of said framework.
If the jib arm is inclined upwards, the small arm will be rotated with respect to the jib axis so that bucket and jib arm do not hinder
20. each other.
An exemplary embodiment of the invention is illustrated in the accompanying drawings, in which:
Figs. 1a and 1b are schematic views of respectively a rear and a side view of a device in accordance with the invention mounted 25 . on a truck; Fig. 2 is a view of the same device shown in figure 1 installed on the roadway of a bridge;
Figs. 3a, 3b and 3c show respectively a front, side and plan view of the bucket lift assembly; 5. Fig. 4 shows in detail the pivot means between the telescopic elements (main boom and jib);
Fig. 5 shows the upward movement of the boom in figure 1;
Fig. 6 shows the downward movement of the boom in figure 1.
rigures 1a, 1b and 2 show a mechanical boom, mounted on a truck 22 in 10. the transport position (figs . 1a and 1b) , i. e. occupying the least possible space, and in the working position (fig. 2) on the roadway of a bridge structure 30 (seen in cross section). The crane is made up of a base structure, immovably installed on the chassis of the truck 22, said base structure having a turret 4 rotably mounted on a 15. pivot means with 360° rotation. Said structure 1 is also equipped with hydraulic stabilizers, mounted on extending cross-beams 3, to ensure the necessary equipment stability.
The turret 4 supports a tilting-type chassis 5, one end of which is pivoted along the periphery of said turret 4, while the other end 20. supports a first element (telescopically extending main bocm 8). The tilting chassis 5 is operated by a pair of double-acting hydraulic cylinders 6.
The outermost end 8a (figure 2) of the element 8 is connected to a toothed pivot means preferably having a double crown of balls (shown
25. in figure 4), said pivot means being driven by a hydraulic geared motor 18 by means of a pinion gear 17 that allows continuous 360° rotation between said element 8 and a second element 10 normally called the jib. This second element is connected to the pivot means 16 by means of a four-hinged articulating mechanism 20 controlled by
5. a pair of double-acting hydraulic cylinders 15. To the rotating part of the pivot, means 16 is fixed a plate 23 to which are articulated both the second telescopically extending element 10 and a lever 20a that is operated by the cylinder 15. Another lever 20b is articulated at one of its ends to lever 20a and to the cylinder 15 and at its 10. other end to the second element 10. The mechanism 20 allows an opening of about 160° between the two elements 8 and 10.
The element 8 acts as the main boom and the element 10 acts as the jib; the telescopic extensions of both elements 8 and 10 are extracted by means of double-acting hydraulic cylinders with chain 15. drives situated inside the elements themselves (not shown in the figures).
A work platform or bucket 12 is supported at the extending end of element 10, with a hydraulic orientation device 21 and a vertical lifting assembly 13. The bucket 12 and the element 10 are connected 20. by means of a special small arm 19 operated by a double-acting hydraulic cylinder.
The device 13, shown in detail in figures 3a, 3b and 3c, comprises an element 34, connected to the orientation device 21, mounting a hydraulic cylinder 27 the piston of which is connected to a first 25. extending element 33. Fleyer-type lifting chains 51, one end 51 of which is fixed to element 34 while the other end is fixed to a second extending element 52, run on idle pulleys and provide for extraction of said element 32.
Likewise chains 54 run on idle pulleys 55 and extract a third element 31 integral with the bucket 12.
As can be seen in figures 5 and 6, in which the main boom and jib are extended, the elements 8 and 10 are preferably provided with triple telescopic extension. In these figures 12' indicates the upper hatched position of the bucket 12.
The main boom and jib, articulated as described above, have 10. sufficient movement to meet the most varied requirements as regards distance and height. They can take on particularly advantageous projecting positions for inspections beneath bridges (as shown in figure 6) or in any event for inspecting areas beyond an obstacle.
After placing element 8 in a vertical position by means of the 15. tilting chassis 5, extension of said element 8 is actuated and element 10 is positioned by means of the four-hinged mechanism 20. At this point extension of element 10 is actuated until the desired point is reached. Then device 13 is used to raise the bucket 12 between the beams of a bridge for example.
20. The orientation device 21, which allows the bucket 12 to be kept level at all times, and the small arm 19 are also of considerable importance in the vast boom movement described. In fact it will be clear that when element 10 is horizontal, if said element 10 is bent further upwards the orientation device 21 will no longer be sufficient to keep the bucket 12 horizontal, since the mechanical suspending parts will be of impediment; this is where the small arm 19, driven by the cylinder 19a and having an angular movement of about 90°, comes into play to lower the bucket while keeping it in a horizontal position.

Claims

C L A I M S
1. A crane comprising a base structure (1) and a mechanical boom consisting of two distinct elements (8 and 10) connected to each other by means of an articulating mechanism (20) that allows the two elements to be reciprocally rotated around an axis perpendicular to the plane containing the two elements, the first element (8), the one nearest to the base structure (1), being constrained, with suitable degrees of freedom, to said structure (1), while the other element (10) supports an orientable bucket (12) at its free end, characterized in that a pivot means (16) is provided between the two elements (8 and 10), allowing rotation around an axis contained in the plane of the boom itself, preferably coinciding with the axis of the first element.
2. A crane in accordance with claim 1, characterized in that the bucket (12) is attached at its point of connection to the second element (8) of the boom by means of a lifting device (13).
3. A crane in accordance with claim 2, characterized in that the lifting device (13) is telescopic and is controlled by a hydraulic cylinder and a set of chains (52, 54) and pulleys (50, 55).
4. A crane in accordance with any one of the preceding claims, characterized in that a small arm (19) is provided between the extending end of the element (10) and the bucket (12), said small arm (19) being driven by a double-acting hydraulic cylinder and being capable of an angular movement of about 90°.
5. A crane in accordance with any one of the preceding claims characterized in that the element (8) is connected to the base structure (1) by means of a tilting chassis (5) operated by double-acting hydraulic cylinders (6), so as to allow aerial work both above and below the load-bearing surface.
6. A crane in accordance with any one of the preceding claims, characterized in that the base structure (1) also comprises a pivot means (9) that allows 360° rotation.
7. A crane in accordance with any one of the preceding claims, characterized in that the articulating mechanism between the two elements (8 and 10) is a four-hinged mechanism (20) that allows an opening of about 160°, operated by a pair of hydraulic cylinders (15).
8. A crane in accordance with any one of the preceding claims, characterized in that at least one of the two elements (8 and 10) forming the boom is telescopic.
9. A crane according to any one of the preceding claims, characterized in that the pivot means (16) allows a continuous 360° movement.
PCT/IT1988/000004 1987-09-18 1988-01-18 Articulated jib crane capable of reaching areas behind an obstacle WO1989002410A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21966/87A IT1222691B (en) 1987-09-18 1987-09-18 ARTICULATED ARM CRANE CAPABLE OF REACHING AREAS ARRANGED BEHIND A DIMENSION
IT21966A/87 1987-09-18

Publications (1)

Publication Number Publication Date
WO1989002410A1 true WO1989002410A1 (en) 1989-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1988/000004 WO1989002410A1 (en) 1987-09-18 1988-01-18 Articulated jib crane capable of reaching areas behind an obstacle

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AU (1) AU1158988A (en)
IT (1) IT1222691B (en)
WO (1) WO1989002410A1 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647771A1 (en) * 1989-06-06 1990-12-07 Pagliero O P Spa Self-supporting machine with two hydraulic stages for lifting a cradle
DE8910749U1 (en) * 1989-09-08 1991-02-07 Moog, Alfons, 7774 Deggenhausertal, De
FR2650815A1 (en) * 1989-08-11 1991-02-15 France Etat Ponts Chaussees Equipment for visually inspecting the faces and walls of a large construction
EP0418736A2 (en) * 1989-09-20 1991-03-27 Putzmeister-Werk Maschinenfabrik Gmbh Device for treating a surface with a water jet
US5174708A (en) * 1988-12-06 1992-12-29 Yellow Freight System, Inc. Boom mounted multiple stage freight lift apparatus
US5176485A (en) * 1988-12-06 1993-01-05 Yellow Freight System, Inc. Freight manipulator with articulated cantilever boom
WO1993007082A1 (en) * 1991-10-09 1993-04-15 Bothe H Melchior Device for approaching positions inside a hollow body, in particular inside the hold of a tanker
EP0596498A1 (en) * 1992-11-06 1994-05-11 Merlo S.P.A. Industria Metalmeccanica Fixture for overhead control of platform lifts, and all-purpose machine fitted with such a fixture
FR2704539A1 (en) * 1993-04-29 1994-11-04 Somadel Personnel lifting apparatus for vehicle
EP0672612A1 (en) * 1994-02-22 1995-09-20 Paul Lingen Working platform mounted on a mobile crane
EP1422190A1 (en) * 2002-11-25 2004-05-26 Jennissen-Gruppe GmbH Mobile elevating work platform
KR100485818B1 (en) * 2002-08-26 2005-04-28 씨에스기계 주식회사 A vehicle inspecting a bridge
WO2006119520A1 (en) * 2005-05-13 2006-11-16 Palfinger Htc Systems Gmbh Device for machining a reservoir
EP2558404A1 (en) * 2010-04-14 2013-02-20 Bronto Skylift OY AB Boom, personnel hoist, and method for using personnel hoist
US20130313044A1 (en) * 2012-05-25 2013-11-28 J. Aubrey Stewart Extension boom apparatus
WO2016176782A1 (en) * 2015-05-07 2016-11-10 Linepro Equipment Ltd. Self-levelling attachment carriage for a boom assembly
US9527697B2 (en) 2013-06-05 2016-12-27 Raka Corporation Articulated jib crane

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Publication number Priority date Publication date Assignee Title
US3085648A (en) * 1960-05-17 1963-04-16 Benedetto Vincenzo Di Wrecking truck
FR2048047A7 (en) * 1969-06-30 1971-03-19 Bartoli Tullio
FR2106543A3 (en) * 1971-09-15 1972-05-05 Harrison John
US3809180A (en) * 1973-05-25 1974-05-07 Fulton Industries Aerial platform apparatus having pipe grabs
US4074790A (en) * 1976-02-27 1978-02-21 Daciano Colbachini Vehicle-borne inspection and maintenance apparatus
DE3540630A1 (en) * 1984-11-16 1986-05-22 Aktiebolaget Sjölanders Smides & Mek Verkstad, Osby MOBILE LIFT
GB2172263A (en) * 1985-03-14 1986-09-17 Nippon Light Metal Co Inspection vehicle for bridges and high level roads
US4646875A (en) * 1985-12-30 1987-03-03 Paxton-Mitchell Company Articulated boom structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085648A (en) * 1960-05-17 1963-04-16 Benedetto Vincenzo Di Wrecking truck
FR2048047A7 (en) * 1969-06-30 1971-03-19 Bartoli Tullio
FR2106543A3 (en) * 1971-09-15 1972-05-05 Harrison John
US3809180A (en) * 1973-05-25 1974-05-07 Fulton Industries Aerial platform apparatus having pipe grabs
US4074790A (en) * 1976-02-27 1978-02-21 Daciano Colbachini Vehicle-borne inspection and maintenance apparatus
DE3540630A1 (en) * 1984-11-16 1986-05-22 Aktiebolaget Sjölanders Smides & Mek Verkstad, Osby MOBILE LIFT
GB2172263A (en) * 1985-03-14 1986-09-17 Nippon Light Metal Co Inspection vehicle for bridges and high level roads
US4646875A (en) * 1985-12-30 1987-03-03 Paxton-Mitchell Company Articulated boom structure

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5174708A (en) * 1988-12-06 1992-12-29 Yellow Freight System, Inc. Boom mounted multiple stage freight lift apparatus
US5176485A (en) * 1988-12-06 1993-01-05 Yellow Freight System, Inc. Freight manipulator with articulated cantilever boom
FR2647771A1 (en) * 1989-06-06 1990-12-07 Pagliero O P Spa Self-supporting machine with two hydraulic stages for lifting a cradle
FR2650815A1 (en) * 1989-08-11 1991-02-15 France Etat Ponts Chaussees Equipment for visually inspecting the faces and walls of a large construction
DE8910749U1 (en) * 1989-09-08 1991-02-07 Moog, Alfons, 7774 Deggenhausertal, De
EP0418736A2 (en) * 1989-09-20 1991-03-27 Putzmeister-Werk Maschinenfabrik Gmbh Device for treating a surface with a water jet
EP0418736A3 (en) * 1989-09-20 1991-09-18 Putzmeister-Werk Maschinenfabrik Gmbh Device for treating a surface with a water jet
WO1993007082A1 (en) * 1991-10-09 1993-04-15 Bothe H Melchior Device for approaching positions inside a hollow body, in particular inside the hold of a tanker
EP0596498A1 (en) * 1992-11-06 1994-05-11 Merlo S.P.A. Industria Metalmeccanica Fixture for overhead control of platform lifts, and all-purpose machine fitted with such a fixture
FR2704539A1 (en) * 1993-04-29 1994-11-04 Somadel Personnel lifting apparatus for vehicle
EP0672612A1 (en) * 1994-02-22 1995-09-20 Paul Lingen Working platform mounted on a mobile crane
KR100485818B1 (en) * 2002-08-26 2005-04-28 씨에스기계 주식회사 A vehicle inspecting a bridge
EP1422190A1 (en) * 2002-11-25 2004-05-26 Jennissen-Gruppe GmbH Mobile elevating work platform
WO2006119520A1 (en) * 2005-05-13 2006-11-16 Palfinger Htc Systems Gmbh Device for machining a reservoir
EP2558404A1 (en) * 2010-04-14 2013-02-20 Bronto Skylift OY AB Boom, personnel hoist, and method for using personnel hoist
EP2558404A4 (en) * 2010-04-14 2014-09-03 Bronto Skylift Oy Ab Boom, personnel hoist, and method for using personnel hoist
US20130313044A1 (en) * 2012-05-25 2013-11-28 J. Aubrey Stewart Extension boom apparatus
US9527697B2 (en) 2013-06-05 2016-12-27 Raka Corporation Articulated jib crane
WO2016176782A1 (en) * 2015-05-07 2016-11-10 Linepro Equipment Ltd. Self-levelling attachment carriage for a boom assembly

Also Published As

Publication number Publication date
AU1158988A (en) 1989-04-17
IT1222691B (en) 1990-09-12
IT8721966A0 (en) 1987-09-18

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