FR2548646A1 - REPLIABLE CRANE WITH QUICK DEPLOYMENT - Google Patents
REPLIABLE CRANE WITH QUICK DEPLOYMENT Download PDFInfo
- Publication number
- FR2548646A1 FR2548646A1 FR8311562A FR8311562A FR2548646A1 FR 2548646 A1 FR2548646 A1 FR 2548646A1 FR 8311562 A FR8311562 A FR 8311562A FR 8311562 A FR8311562 A FR 8311562A FR 2548646 A1 FR2548646 A1 FR 2548646A1
- Authority
- FR
- France
- Prior art keywords
- mast
- boom
- cable
- crane
- foot
- 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.)
- Granted
Links
Classifications
-
- 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
- B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
- B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks
-
- 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
- B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
Abstract
L'INVENTION CONCERNE UNE GRUE DEPLIABLE. SOUS L'ACTION DU VERIN DE RELEVAGE 10, LE CABLE ARRIERE 18, PROLONGE PAR LE HAUBAN 41, PROVOQUE LE RELEVAGE DU PIED DE FLECHE 15 AUTOUR DE L'AXE 25. SIMULTANEMENT, LE CABLE DE COMPENSATION 29 RETIENT LA POINTE DE FLECHE 17 ET EVITE QU'ELLE NE SE RELEVE BRUTALEMENT (FLECHE 38). EN FIN DE RELEVAGE, LES DEUX MEMBRURES SUPERIEURES 39 ET 40 TRAVAILLENT CONSTAMMENT EN COMPRESSION L'UNE CONTRE L'AUTRE. APPLICATION : DEPLOIEMENT ET REPLIAGE ENTIEREMENT AUTOMATIQUE SOUS UN FAIBLE ENCOMBREMENT HORIZONTAL; ABSENCE DE MECANISME POUR VERROUILLER ET DEVERROUILLER LES DEUX MEMBRURES 39 ET 40.THE INVENTION RELATES TO A DEPLIABLE CRANE. UNDER THE ACTION OF THE LIFT CYLINDER 10, THE REAR CABLE 18, EXTENDED BY THE RAY 41, CAUSES THE LIFT OF THE ARROW FOOT 15 AROUND THE AXIS 25. AT THE SAME TIME, THE COMPENSATION CABLE 29 RETAINS THE ARROW TIP 17 AND AVOID THAT SHE DOESN'T RISE UP BRUTALLY (ARROW 38). AT THE END OF LIFTING, THE TWO UPPER CHAMBERS 39 AND 40 WORK CONSTANTLY IN COMPRESSION AGAINST THE OTHER. APPLICATION: FULLY AUTOMATIC DEPLOYMENT AND FOLDING UNDER A LOW HORIZONTAL OVERALL; LACK OF MECHANISM TO LOCK AND UNLOCK THE TWO MEMBERS 39 AND 40.
Description
La présente invention est relative à une grue repliable, et plusThe present invention relates to a folding crane, and more
particulièrement à une grue distributrice, especially to a distributing crane,
c'est-à-dire possédant une flèche horizontale le long de la5 quelle peut se déplacer un chariot de levage. that is, having a horizontal arrow along which can move a lift truck.
On connaît des grues de ce type utilisées dans l'industrie du bâtiment, qu'on transporte d'un chantier à 1 ' autre à l'état replié sous un encombrement réduit Une fois parvenue sur place, la grue est déployée jusqu'à sa position 10 de travail Pour cela, on constate habituellement que la grue occupe au sol un encombrement important au début du montage De plus, pendant le montage, elle balaye autour d'elle un espace étendu, ce qui constitue un inconvénient grave lorsque le chantier est encombré Enfin, la plupart des grues connues de ce type possèdent une flèche formée de deux éléments repliables, à savoir un pied de flèche et une pointe de flèche, entre lesquels il est nécessaire de prévoir un système de verrouillage et de déverrouillage dont le fonctionnement -est difficile à 20 automatiser Cranes of this type used in the construction industry are known, which are transported from one site to another in the folded-up state under a reduced space requirement. Once arrived on site, the crane is deployed to its location. working position 10 For this, it is usually found that the crane occupies the ground a large footprint at the beginning of assembly In addition, during assembly, it sweeps around it an extended space, which is a serious drawback when the site is Finally, most of the known cranes of this type have an arrow formed by two folding elements, namely an arrowhead and an arrowhead, between which it is necessary to provide a locking and unlocking system whose operation - is difficult to automate
La présente invention a pour but d'éviter ces inconvénients, en réalisant une grue à déploiement automatique dans l'espace, susceptible d'être utilisée sous un encombrement réduit, tandis que par ailleurs son déploiement 25 peut être effectué de façon entièrement automatique. The object of the present invention is to avoid these drawbacks, by producing an automatically deployable crane in space, which can be used under a small footprint, while in addition its deployment can be performed completely automatically.
Une grue repliable selon l'invention comprend un mât relevable sur le sommet duquel est articulé un pied de flèche, dont l'extrémité porte l'axe d'articulation d'une pointe de flèche, tandis qu'un système à câble de traction arrière de longueur constante, reliant un point de la flèche à un point fixe de la base du mât, provoque automatiquement le déploiement de la flèche en fin de relevage du mât, et elle est caractérisée en ce qu'elle comporte par ailleurs, un câble de compensation de longueur fixe, ancré par une extrémité 35 sur la pointe de flèche, et sur l'autre extrémité sur le somment du mât, tandis que par ailleurs, il passe autour d'au moins une poulie située dans la zone d'articulation du pied de flèche sur le mât, ce qui lui permet d'agir de façon antagoniste par rapport aux moyens connus de déploiement de la to flèche au cours du relevage du mât, c'est-à-dire de retenir la pointe de flèche en empêchant son déploiement brutal au cours du relevage du mât, et au contraire, de ramener cette pointe de flèche sous le pied de flèche pendant lf, début des opérations de repliage de la grue. Grâce à cette disposition, on constate que pendant les premières phases du processus de relevage et de déploiement de la grue, les élements du mât et de la flèche de celle-ci se déplacent suivant une direction sen10 siblement verticale, c'est-à-dire suivant un encombrement au sol réduit Suivant une autre caractéristique de 1 ' invention, le câble de compensation est ancré sur la membrure inférieure de la pointe de flèche, alors qu'au con15 traire, le câble de déploiement est ancré sur la membrure supéreirue de cette pointe de flèche, si bien que sur la grue déployée, les deux membrures supérieures, respectivement du pied de flèche et de la pointe de flèche, ap puyées bout à bout l'une contre l'autre, travaillent cons20 tamment à la compression dans leur zone d'appui, ce qui dispense de prévoir à cet endroit, un quelconque système de verrouillage ou de déverrouillage, les opérations de A folding crane according to the invention comprises a liftable mast on the top of which is articulated an arrow foot, whose end carries the axis of articulation of an arrowhead, while a rear traction cable system of constant length, connecting a point of the boom to a fixed point of the base of the mast, automatically causes the deployment of the boom at the end of raising the mast, and it is characterized in that it also comprises a cable of fixed length compensation, anchored at one end on the boom tip, and at the other end on the mast mast, while in addition, it passes around at least one pulley located in the hinge area of the mast. foot of arrow on the mast, which allows it to act in an antagonistic manner with respect to the known means of deployment of the arrow during the lifting of the mast, that is to say to retain the arrowhead by preventing its brutal deployment during the r raising the mast, and on the contrary, to bring this arrowhead under the foot of arrow during lf, beginning crane folding operations. With this arrangement, it can be seen that during the first phases of the process of lifting and deploying the crane, the elements of the mast and the boom of the latter move in a direction that is sen10 vertically vertical, that is to say According to another feature of the invention, the compensation cable is anchored to the lower chord of the boom tip, whereas at the other end, the deployment cable is anchored to the upper chord of the boom member. this boom tip, so that on the crane deployed, the two upper chords, respectively of the foot of the boom and the arrowhead, butted end to end against each other, work consu tantly with the compression in their support zone, which eliminates the need for any locking or unlocking system at this point,
déploiement et de repliage de la grue pouvant ainsi s'effectuer de façon entièrement automatique. deployment and folding of the crane can thus be done fully automatically.
Le dessin annexé, donné à titre d'exemple non limitatif, permettra de mieux comprendre les caractérisitques de l'invention. The accompanying drawing, given by way of non-limiting example, will provide a better understanding of the features of the invention.
Figure 1 est une vue d'ensemble d'une grue selon l'invention, en position repliée de transport. 30 Figures 2 à 5 illustrent les phases successives du déploiement de la grue. Figure 1 is an overall view of a crane according to the invention, in the folded transport position. Figures 2 to 5 illustrate the successive phases of the deployment of the crane.
On a représenté sur les ddssins, une grue repliable dont le mât est formé de deux éléments, à savoir: un pied de mât 1, articulé autour d'un axe horizontal 2, sur un châssis tournant 3; une tête de mât 4, qui est articulée autour d'un axe horizontal 5, sur 1 ' extrémité supérieure arrière du pied de mât 1 There is shown on the ddssins, a folding crane whose mast is formed of two elements, namely: a mast 1, articulated around a horizontal axis 2, on a rotating frame 3; a masthead 4, which is articulated around a horizontal axis 5, on the upper rear end of the mast foot 1
Le chassis tournant 3 est porté par un pi- The rotating frame 3 is carried by a
Z 548646Z 548646
vot vertical 6, surmontant un châssis de base 7 Ce dernier vertical vot 6, surmounting a base frame 7 The latter
peut être équipé d'un ou plusieurs trains de roulement, à la manière habituelle, pour permettre de déplacer la grue. can be equipped with one or more running gear, in the usual way, to allow to move the crane.
L'axe 2 est prévu à l'avant du châssis tournant 3 A l'arrière, ce dernier comporte un caisson de lestage 8 sur lequel prend appui en 9, une extrémité d'un vérin de relevage 10 dont l'extrémité opposée 11 s'articule sur la face arrière du pied de mât 1 O Une bielle ou hauban rigide 12 relie également le caisson de lestage 8 à un point 13, situé sur la face arrière de la tête de mât 4, à proximité de l'axe d'articulation 5 Sur un axe 14 prévu au sommet de la tête de mât 15 4, est articulée l'extrémité arrière du pied 15 d'une flèche distributrice L'extrémité avant du pied 15 porte sur ses membrures inférieures, un axe transversal 16, sur lequel sont articulées les membrures inférieures d'une pointe de flèche The axis 2 is provided at the front of the rotating frame 3 At the rear, the latter comprises a ballast box 8 on which bears at 9, an end of a lifting cylinder 10 whose opposite end 11 s articulates on the rear face of the mast foot 1 O A rod or rigid stay 12 also connects the ballast box 8 to a point 13, located on the rear face of the mast head 4, close to the axis of the mast. articulation 5 On an axis 14 provided at the top of the masthead 15 4 is articulated the rear end of the foot 15 of a distributing arrow The front end of the foot 15 carries on its lower chords, a transverse axis 16, on which are hinged the lower chords of an arrowhead
rabattable 17folding 17
On prévoit par ailleurs un câble arrière 18 de longueur constante, dont l'extrémité inférieure est fixée au châssis tournant 3, par exemple au niveau du point 9 du caisson de lestage 8 Ce câble arrière 18 passe successivement: sur une poulie 19, qu'un hauban 20 relie à un point fixe 21 de la face arrière de la tête de mât, par exemple entre l'axe 5, et le point de fixation 13 du hauban 12; sur une poulie 22, portée par la face arrière du sommet de la tête de mât 4; sur une poulie 23 portée par le dos d'une contre-flèche 24 30 articulée en 25 sur le sommet de la tête de mât 4; sur une poulie 26 portée par la partie supérieure de l'arrière de la pointe de flèche 17 Finalement, l'extrémité correspondante du câble arrière 18 est fixée en 27 sur la membrure supérieure de la pointe de flèche 17, en un point situé plus près de l'extrémité avant 28 de la pointe de flèche 17, que de son axe d'articulation arrière 16 Par ailleurs, l'invention prévoit un câble de retenue 29 à longueur constante dont la première extrémité est 40 fixée en 30 sur la face arrière de la tête de mât 4, près du sommet Ce câble de retenue 29 passe également sur la poulie 22, et sur la poulie 23, puis il suit la direction longitudinale du pied de flèche 15, avant de passer, près 5 de son axe avant 16, entre deux poulies 31 et 32, situées à proximité de la membrure inférieure 33 du pied de flèche Au-delà, l'extrémité correspondante du câble de compensation 29 est fixée en 33 à la membrure inférieure de la pointe de flèche 17 Le fonctionnement est le suivant: Lorsqu'on veut déployer la grue à partir de la position repliée de la figure 1, on agit sur le vérin de relevage 10, pour provoquer sa contraction Le pied de mât 1 amorce son mouvement de relevage, comme illustré sur la figure 2, par la flèche 34, cependant que l'action du hauban 12 relève la tête de mât 4, comme indiqué par la flèche 35 Le câble arrière 18 se tend Etant ancré sur l'extrémité 36 de la contre-flèche 24, il provoque le relevage de celle -ci, comme schématisé par la flèche 37 Le pied de flèche 20 15 décolle ainsi de la tête de mât 4, par pivotement autour de l'axe 14, mais le câble de compensation 29 retient la pointe de flèche 17, et l'empêche de pivoter brutalement autour de l'axe 16, suivant la direction de la flèche 38 Grâce à cette disposition, on remarque que, 25 jusqu'à la position de la figure 3, les divers éléments de la grue en cours de relevage se déplacent vers le haut, sans augmenter l'encombrement horizontal de l'appareil, ni It also provides a rear cable 18 of constant length, whose lower end is fixed to the rotating frame 3, for example at the point 9 of the ballast box 8 This rear cable 18 passes successively: on a pulley 19, that a stay 20 connects to a fixed point 21 of the rear face of the mast head, for example between the axis 5, and the attachment point 13 of the stay 12; on a pulley 22, carried by the rear face of the top of the masthead 4; on a pulley 23 carried by the back of a counter-boom 24 articulated at 25 on the top of the mast head 4; on a pulley 26 carried by the upper part of the rear of the boom tip 17 Finally, the corresponding end of the rear rope 18 is fixed at 27 on the upper chord of the boom tip 17, at a point located closer of the front end 28 of the arrowhead 17, that of its rear hinge pin 16 Furthermore, the invention provides a retaining cable 29 of constant length whose first end is fixed at 30 30 on the rear face This retaining cable 29 also passes over the pulley 22, and onto the pulley 23, and then follows the longitudinal direction of the jib foot 15, before passing near its front axis. 16, between two pulleys 31 and 32, located near the lower chord 33 of the boom foot Beyond, the corresponding end of the compensation cable 29 is fixed at 33 to the lower chord of the boom tip 17 The operation is the next: When one wants to deploy the crane from the folded position of Figure 1, it acts on the lift cylinder 10, to cause contraction The mast foot 1 initiates its lifting movement, as shown in Figure 2 , by the arrow 34, while the action of the stay 12 raises the masthead 4, as indicated by the arrow 35 The rear cable 18 is stretched Being anchored on the end 36 of the counter-boom 24, it causes the raising of the latter, as shown schematically by the arrow 37 The jib foot 20 15 and takes off from the mast head 4, by pivoting about the axis 14, but the compensation cable 29 retains the arrow tip 17, and prevents it from pivoting roughly around the axis 16, in the direction of the arrow 38 With this arrangement, it can be seen that, up to the position of FIG. 3, the various elements of the crane being lifted move upward, without increasing the horizontal clutter of the neither
au niveau-du sol, ni à quelque niveau que ce soit. at ground level or at any level.
Par ailleurs, le trajet imposé au câble ar30 rière 18 par les poulies 22 et 23 permet de limiter les efforts au montage de la grue Pendant la suite des opérations de relevage ( figure 4) -, le câble de compensation 29 relâche petit à petit la pointe de flèche 17, jusqu'à ce que celle-ci vien35 ne horizontalement, dans le prolongement du pied de flèche A cet instant, la membrure supérieure 39 de la pointe de flèche 17 vient en butée sur la membrure supérieure 40 du pied de flèche 15 L'ensemble conserve cette position Furthermore, the path imposed on the wire rope 18 by the pulleys 22 and 23 makes it possible to limit the forces during the assembly of the crane. During the subsequent lifting operations (FIG. 4), the compensation cable 29 loosens little by little arrowhead 17, until it comes horizontally, in the extension of the jib foot At this moment, the upper chord 39 of the jib 17 abuts on the upper chord 40 of the jib foot 15 The whole keeps this position
jusqu'à la fin de l'opération de relevage ( figure 5), pour 40 laquelle les deux éléments 1 et 4 du mât sont dressés verti- until the end of the lifting operation (FIG. 5), for which the two elements 1 and 4 of the mast are erected vertically.
calement dans le prolongement l'un de l'autre La grue se trouve alors en position de travail On constate que, désormais, les deux membrures supérieurs 39 et 40 travaillant continuellement en compression l'une contre l'autre, tout mécanisme de verrouillage ou de déverrouillage est superflu à cet endroit cette opération permet d'obtenir pour la grue une cinématique de dépliage complètement automatique On remarque, en particulier, que le point de fixation de 10 l'extrémité 27 du hauban 41 prolongeant le câble arrière 18 au-delà de la pointe de contre-flèche 36, est situé très en avant sur la pointe de flèche 17, ce qui facilite encore la suppression de tout système de verrouillage entre les membrures supérieures 40 et 39, lorsque celles-ci sont alignées 15 (figures 4 et 5) The crane is then in the working position. It can be seen that, from now on, the two upper chords 39 and 40 work continuously in compression against one another, any locking mechanism or This operation makes it possible to obtain for the crane a fully automatic unfolding kinematics. It should be noted in particular that the point of attachment of the end 27 of the stay 41 extending the rear cable 18 beyond of the counter-arrow tip 36, is located very far forward on the arrowhead 17, which further facilitates the removal of any locking system between the upper chords 40 and 39, when these are aligned 15 (FIG. and 5)
Claims (4)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8311562A FR2548646B1 (en) | 1983-07-05 | 1983-07-05 | FAST FOLDING FOLDABLE CRANE |
IT19667/84A IT1173292B (en) | 1983-07-05 | 1984-02-17 | QUICK RELEASE FOLDING CRANE |
DE3407021A DE3407021C2 (en) | 1983-07-05 | 1984-02-27 | FOLDING TOWER TURNING CRANE |
ES530283A ES530283A0 (en) | 1983-07-05 | 1984-03-05 | FAST-DEPLOYABLE FOLDING CRANE. |
GB08405746A GB2142902B (en) | 1983-07-05 | 1984-03-05 | Folding tower crane with automatic jib extension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8311562A FR2548646B1 (en) | 1983-07-05 | 1983-07-05 | FAST FOLDING FOLDABLE CRANE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2548646A1 true FR2548646A1 (en) | 1985-01-11 |
FR2548646B1 FR2548646B1 (en) | 1985-12-13 |
Family
ID=9290728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8311562A Expired FR2548646B1 (en) | 1983-07-05 | 1983-07-05 | FAST FOLDING FOLDABLE CRANE |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE3407021C2 (en) |
ES (1) | ES530283A0 (en) |
FR (1) | FR2548646B1 (en) |
GB (1) | GB2142902B (en) |
IT (1) | IT1173292B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2605619A1 (en) * | 1986-10-27 | 1988-04-29 | Potain Sa | REPLIABLE MACHINE FOR HANDLING AND LIFTING LOADS |
EP0331856A1 (en) * | 1988-03-02 | 1989-09-13 | Potain | Foldable crane with rapid and automatic deployment |
EP0536061A1 (en) | 1991-10-02 | 1993-04-07 | Potain | Automatically foldable tower crane |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8720596D0 (en) * | 1987-09-02 | 1987-10-07 | British Petroleum Co Plc | Folding boom |
DE69919517T2 (en) * | 1999-06-02 | 2005-09-29 | Jean-Marc Yerly | Crane with articulated crane arm |
FR2838415B1 (en) * | 2002-04-12 | 2004-10-01 | Potain Sa | DEVICE FOR LIFTING AND FILLING THE MAT AND TILTING THE ARROW OF A CRANE |
DE102013006104A1 (en) * | 2013-04-09 | 2014-10-09 | Liebherr-Werk Biberach Gmbh | Foldable crane jib and crane |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2303751A1 (en) * | 1975-03-14 | 1976-10-08 | Noel Guy | Folding mast for mobile crane - has cable operated sliding pin with two locations in slot for folded and extended positions |
FR2398017A1 (en) * | 1977-07-22 | 1979-02-16 | Acme | IMPROVEMENTS TO SYSTEMS FOR FOLDING OR DEPLOYING THE ARTICULATED BOOM OF A TELESCOPIC MAST CRANE |
FR2422581A1 (en) * | 1978-04-10 | 1979-11-09 | Potain Sa | Tower crane with telescopic mast - has ground counterbalancing beam for rope passing over pulley above end of jib |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2318339A1 (en) * | 1973-04-12 | 1974-10-31 | Costantino Dalla Benetta | Erectable, lowerable and movable crane |
-
1983
- 1983-07-05 FR FR8311562A patent/FR2548646B1/en not_active Expired
-
1984
- 1984-02-17 IT IT19667/84A patent/IT1173292B/en active
- 1984-02-27 DE DE3407021A patent/DE3407021C2/en not_active Expired - Fee Related
- 1984-03-05 ES ES530283A patent/ES530283A0/en active Granted
- 1984-03-05 GB GB08405746A patent/GB2142902B/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2303751A1 (en) * | 1975-03-14 | 1976-10-08 | Noel Guy | Folding mast for mobile crane - has cable operated sliding pin with two locations in slot for folded and extended positions |
FR2398017A1 (en) * | 1977-07-22 | 1979-02-16 | Acme | IMPROVEMENTS TO SYSTEMS FOR FOLDING OR DEPLOYING THE ARTICULATED BOOM OF A TELESCOPIC MAST CRANE |
FR2422581A1 (en) * | 1978-04-10 | 1979-11-09 | Potain Sa | Tower crane with telescopic mast - has ground counterbalancing beam for rope passing over pulley above end of jib |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2605619A1 (en) * | 1986-10-27 | 1988-04-29 | Potain Sa | REPLIABLE MACHINE FOR HANDLING AND LIFTING LOADS |
EP0331856A1 (en) * | 1988-03-02 | 1989-09-13 | Potain | Foldable crane with rapid and automatic deployment |
EP0536061A1 (en) | 1991-10-02 | 1993-04-07 | Potain | Automatically foldable tower crane |
Also Published As
Publication number | Publication date |
---|---|
GB2142902B (en) | 1987-04-29 |
IT8419667A0 (en) | 1984-02-17 |
GB2142902A (en) | 1985-01-30 |
GB8405746D0 (en) | 1984-04-11 |
DE3407021C2 (en) | 1993-11-04 |
ES8500182A1 (en) | 1984-11-01 |
FR2548646B1 (en) | 1985-12-13 |
IT1173292B (en) | 1987-06-18 |
ES530283A0 (en) | 1984-11-01 |
DE3407021A1 (en) | 1985-01-17 |
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