FR2516428A1 - Pivoting hoist jib for workshop - uses pin joints with axles inclined to vertical and arm pivots back under its own - Google Patents

Pivoting hoist jib for workshop - uses pin joints with axles inclined to vertical and arm pivots back under its own Download PDF

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Publication number
FR2516428A1
FR2516428A1 FR8121724A FR8121724A FR2516428A1 FR 2516428 A1 FR2516428 A1 FR 2516428A1 FR 8121724 A FR8121724 A FR 8121724A FR 8121724 A FR8121724 A FR 8121724A FR 2516428 A1 FR2516428 A1 FR 2516428A1
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FR
France
Prior art keywords
main arm
arm
vertical
workshop
satellite
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.)
Withdrawn
Application number
FR8121724A
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French (fr)
Inventor
Jose Garcia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giros SA H
Original Assignee
Giros SA H
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Filing date
Publication date
Application filed by Giros SA H filed Critical Giros SA H
Priority to FR8121724A priority Critical patent/FR2516428A1/en
Publication of FR2516428A1 publication Critical patent/FR2516428A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/18Cranes 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
    • B66C23/20Cranes 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 with supporting couples provided by walls of buildings or like structures
    • B66C23/208Cranes 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 with supporting couples provided by walls of buildings or like structures with supporting couples provided from the side, e.g. by walls of buildings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25HWORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/02Cranes 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 with non-adjustable and non-inclinable jibs mounted solely for slewing movements
    • B66C23/027Pivot axis separated from column axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The retracting cantilever beam is used, suspends power tools in an engineering workshop, comprising two arms (4,5) connected at an articulated elbow joint (8). The inner arm (4) is connected to a wall mounting (11) or a column by a second articulated joint (7) and the joint axes are inclined to the vertical, the arrangement causing the beam to pivot back to the retracted position when released. A stop may limit the movement of the outer arm as it takes up a nominally offset retracted position under the inner arm, the inclination of the root axle (7)being adjustable to either side of a vertical mean. The root axle may be mounted on a plate (13) which can pivot about an horizontal axis (12), pivoting being effected by adjusting screws (21,22).

Description

La présente invention concerne une potence d'atelier repliable, du genre comprenant un bras principal articulé sur un support mural ou sur un fût fixé au sol, et un bras satellite articulé au bras principal. The present invention relates to a folding workshop bracket, of the type comprising a main arm articulated on a wall support or on a drum fixed to the ground, and a satellite arm articulated on the main arm.

Une telle potence d'atelier, à laquelle peuvent être suspendus des outils ou appareils divers, est déployée pour son utilisation, et repliée lorsqu'elle n'est pas utilisée. En position déployée, les deux bras viennent dans le prolongement l'un de l'autre. En position repliée, le bras satellite est placé sous le bras principal, et l'ensemble de ces deux bras est orienté de manière à ne pas constituer un obstacle gnant, en étant par exemple rabattu contre un mur. Such a workshop bracket, to which various tools or apparatus can be hung, is deployed for its use, and folded up when not in use. In the deployed position, the two arms come in line with one another. In the folded position, the satellite arm is placed under the main arm, and the assembly of these two arms is oriented so as not to constitute a nuisance obstacle, for example by being folded against a wall.

Il n'existe toutefois pas de dispositif qui ramène automatiquement la potence dans sa position repliée, lorsqu'on cesse de l'utiliser, de sorte que la potence risque de rester en position déployée et/ou dans une orientation non souhaitable. Des accrochages et accidents peuvent alors se produire, notamment au passage de véhicules, d'engins de manutention, ou de parties de tels engins, par exemple les palans de ponts roulants. However, there is no device which automatically returns the stem to its folded position, when it is no longer used, so that the stem risks remaining in the deployed position and / or in an undesirable orientation. Skirmishes and accidents can then occur, in particular when passing vehicles, handling equipment, or parts of such equipment, for example overhead crane hoists.

La présente invention elimine ces inconvénients, en fournissant une potence d'atelier perfectionnée, pourvue de moyens simples et fiables assurant le repli age automatique du bras satellite et le retour des deux bras dans une position déterminee, avec la possibilité de choisir cette position, de manière à toujours dégager une certaine zone tout en réduisant l'encombrement de la potence. The present invention eliminates these drawbacks, by providing an improved workshop stem, provided with simple and reliable means ensuring the automatic folding of the satellite arm and the return of the two arms to a determined position, with the possibility of choosing this position, so as always to clear a certain area while reducing the size of the stem.

A cet effet, dans la potence d'atelier repliable objet de l'invention, l'axe d'articulation du bras principal sur le support mural ou sur le fût ,de même que l'axe d'articulation du bras satellite sur le bras principal, sont légérement inclines sur la verticale, de manière à permettre par simple gravité le repliage du bras satellite sous le bras principal, et la venue de l'ensemble de ces deux bras dans une orientation determnee, lorsque la potence est libérée.  To this end, in the foldable workshop bracket object of the invention, the axis of articulation of the main arm on the wall support or on the barrel, as well as the axis of articulation of the satellite arm on the arm main, are slightly inclined on the vertical, so as to allow by simple gravity the folding of the satellite arm under the main arm, and the coming of all of these two arms in a determined orientation, when the stem is released.

Les angles d'inclinaison sur la verticale des deux axes restent évidemment très petits, et sont par exemple compris entre 10 et 20.  The angles of inclination on the vertical of the two axes obviously remain very small, and are for example between 10 and 20.

Avantageusement, pour que s'amorce le repliage par gravité du bras satellite sous le bras principal, et pour que ce mouvement s'effectue dans un sens déterminé et sans que le bras satellite décrive un tour complet, il est prévu d'une part qu'en position totalement déployée le bras satellite vu en plan ne se trouve pas exactement dans l'alignement du bras principal, et d'autre part qu'une butee solidaire du bras principal limite le pivotement du bras satellite lorsque ce dernier est parvenu sous le bras principal. Advantageously, so that the folding of the satellite arm under gravity begins under the main arm, and so that this movement takes place in a determined direction and without the satellite arm describing a complete revolution, it is provided on the one hand that '' in the fully deployed position the satellite arm seen in plan is not exactly in alignment with the main arm, and secondly that a stop secured to the main arm limits the pivoting of the satellite arm when the latter has reached the main arm.

De préférence, l'inclinaison de l'axe d'articulation du bras principal sur le support mural ou sur le fût est réglable de part et d'autre d'une position moyenne verticale. On peut de cette manière choisir l'orientation en position repliée, entre deux orientations opposées. De plus, l'angle d'inclinaison de l'axe est ajustable, en fonction du poids de la potence et de la charge qu'elle supporte, de façon à obtenir un repliage ni trop brusque ni trop lent, et à obtenir aussi un ordre de repliage déterminé des deux bras. Preferably, the inclination of the axis of articulation of the main arm on the wall support or on the barrel is adjustable on either side of an average vertical position. In this way, it is possible to choose the orientation in the folded position, between two opposite orientations. In addition, the angle of inclination of the axis is adjustable, depending on the weight of the stem and the load it supports, so as to obtain a folding that is neither too abrupt nor too slow, and also to obtain a determined folding order of the two arms.

Suivant une forme de réalisation particulière de l'invention, le bras principal est articulé sur une platine verticale elle-même montée pivotante, suivant un axe horizontal, sur le support mural ou sur le fût,des moyens à vis étant prévus pour faire pivoter ladite platine, de part et d'autre d'une position moyenne verticale, et modifier ainsi l'inclinaison de l'axe d'articulation du bras principal, et d'autres moyens à vis étant prévus pour immobiliser la platine dans la position angulaire correspondant à l'inclinaison désirée de l'axe précité. According to a particular embodiment of the invention, the main arm is articulated on a vertical plate itself pivotally mounted, along a horizontal axis, on the wall support or on the barrel, screw means being provided for pivoting said plate, on either side of a vertical mean position, and thus modify the inclination of the articulation axis of the main arm, and other screw means being provided for immobilizing the plate in the corresponding angular position at the desired inclination of the above axis.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution de cette potence d'ate lier repliable
Figure 1 est une vue générale de côté d'une potence conforme à l'invention, en position déployée ;
Figure 2 est une vue en plan par dessus de la potence de figure 1
Figure 3 en est une vue partielle, à echelle agrandie et avec coupes, montrant le de'tain des deux articulations avec les moyens de réglage.
In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting example, an embodiment of this collapsible linkage bracket.
Figure 1 is a general side view of a bracket according to the invention, in the deployed position;
Figure 2 is a plan view from above of the bracket of Figure 1
Figure 3 is a partial view, on an enlarged scale and with sections, showing the detain of the two joints with the adjustment means.

Sur la figure 1 est représentée une potence d'atelier repliable avec : son fût 1 fixé au sol 2 par un socle 3, son bras principal 4 et son bras satellite 5, à l'extrémi- té libre duquel est suspendu un outil ou appareil 6. Le repère 7 désigne l'axe d'articulation d'une extrémité du bras principal 4 au sommet du fût 1, tandis que le repère 8 désigne l'axe d'articulation du bras satellite 5 à l'autre extrémité du bras principal 4. In FIG. 1 is shown a collapsible workshop bracket with: its barrel 1 fixed to the ground 2 by a base 3, its main arm 4 and its satellite arm 5, at the free end from which a tool or apparatus is suspended 6. The reference 7 designates the axis of articulation of one end of the main arm 4 at the top of the barrel 1, while the reference 8 designates the axis of articulation of the satellite arm 5 at the other end of the main arm 4.

Selon l'invention, l'axe dtarticulation 7 est incliné sur la verticale d'un certain angles, et l'axe d'articulation B est lui aussi incliné sur la verticale d'un certain angle 6, ces deux angles restant cependant de faible valeur, comprise par exemple entre 10 et 20. Le résultat ainsi obtenu est un repliage du bras satellite 5 sous le bras principal 4, et une venue de l'ensemble de ces deux bras 4 et 5 dans une orientation déterminée, sous le seul effet de la gravité donc de façon automatique dès que l'outil ou appareil 6 est relâché par l'opérateur. According to the invention, the axis of articulation 7 is inclined to the vertical by a certain angle, and the axis of articulation B is also inclined to the vertical of a certain angle 6, these two angles however remaining small. value, for example between 10 and 20. The result thus obtained is a folding of the satellite arm 5 under the main arm 4, and a coming of the set of these two arms 4 and 5 in a determined orientation, under the sole effect gravity therefore automatically as soon as the tool or device 6 is released by the operator.

En position déployÉe, comme le montre la vue en plan de la figure 2, une butée empêche le bras satellite 5 de venir exactement dans l'alignement du bras principal 4. In the deployed position, as shown in the plan view of FIG. 2, a stop prevents the satellite arm 5 from coming exactly in alignment with the main arm 4.

Cette caractéristique, combinée avec l'inclinaison 6 de l'axe 8, permet au pivotement du bras satellite 5 relativement au bras principal 4 de s'amorcer et ceci dans un sens déterminé, suivant la flèche 9.This characteristic, combined with the inclination 6 of the axis 8, allows the pivoting of the satellite arm 5 relative to the main arm 4 to start and this in a determined direction, according to arrow 9.

Le bras principal 4 porte un étrier 10 faisant saillie vers le bas et constituant une butée qui arrtte le bras satellite 5, lorsque ce dernier est parvenu sous le bras principal 4 (voir la position indiquée en traits mixtes sur la figure 1). The main arm 4 carries a stirrup 10 projecting downwards and constituting a stop which stops the satellite arm 5, when the latter has reached the main arm 4 (see the position indicated in phantom in Figure 1).

L'angle Q( est réglable de part et d'autre d'une position moyenne verticale, ce qui permet de choisir l'orientation en position repliée des deux bras superposés 4 et 5. La figure 3 montre une réalisation des moyens permettant ce réglage :
Sur une semelle verticale 11, solidaire de la partie supérieure du fût 1, est montée pivotante, suivant un axe horizontal 12, une platine verticale 13 qui reste appliquée contre la semelle 11 ; l'axe 12 qui traverse la partie supérieure de la platine 13 est réalisable sous la forme d'un simple téton porté par la semelle 11.
The angle Q (is adjustable on either side of a vertical mean position, which makes it possible to choose the orientation in the folded position of the two superimposed arms 4 and 5. FIG. 3 shows an embodiment of the means allowing this adjustment :
On a vertical sole 11, integral with the upper part of the barrel 1, is pivotally mounted, along a horizontal axis 12, a vertical plate 13 which remains applied against the sole 11; the axis 12 which crosses the upper part of the plate 13 can be produced in the form of a simple stud carried by the sole 11.

La platine 13 comporte deux oreilles superposées 14 et 15, traversées par l'axe 7 qui est retenu sur l'oreille supérieure 14 au moyen de deux goupilles 16. La première extrémité du bras principal 4, conformée en manchon 17, est montée autour de l'axe 7 avec interposition de roulements à aiguilles 18, tandis qu'une butée à aiguilles 19 est interposée entre le manchon 17 et l'oreille inférieure 15.The plate 13 comprises two superimposed ears 14 and 15, crossed by the axis 7 which is retained on the upper ear 14 by means of two pins 16. The first end of the main arm 4, shaped as a sleeve 17, is mounted around the axis 7 with interposition of needle bearings 18, while a needle stop 19 is interposed between the sleeve 17 and the lower lug 15.

Du bord inférieur de la platine 13 fait saillie un doigt 20, pouvant être poussé d'un c-ôté ou de l'autre au moyen de deux vis opposées 21 et 22, vissées dans des blocs taraudés respectifs 23 et 24 solidaires de la semelle 11, et portant des écrous, respectivement 25 et 26. On comprend que le vissage ou le dévissage des vis 21 et 22 permet de faite pivoter la platine 13 autour de l'axe 12, donc de faire varier l'inclinaison de l'axe d'articulation 7 du bras principal 4, de part et d'autre de la positon moyenne verticale représentée sur la figure 3. From the lower edge of the plate 13 protrudes a finger 20, which can be pushed from one side or the other by means of two opposite screws 21 and 22, screwed into respective tapped blocks 23 and 24 secured to the sole 11, and carrying nuts, respectively 25 and 26. It is understood that the screwing or unscrewing of the screws 21 and 22 makes it possible to pivot the plate 13 around the axis 12, therefore to vary the inclination of the axis articulation 7 of the main arm 4, on either side of the vertical mean position shown in FIG. 3.

Pour immobiliser la platine 13 dans la position angulaire correspondant à l'inclinaison o( désirée de l'axe 7, sont ici prévus
- d'une part, deux trous circulaires 27 ménagés à la partie supérieure de la platine 13, de part et d'autre de l'axe de pivotement 12 de cette dernière, et recevant avec un certain jeu des vis (non représentées), vissées dans des taraudages 28 de la semelle 11
- d'autre part, deux lumières 29 ménagées à la partie inférieure de la platine 13 et centrées sur l'axe de pivotement 12 de cette dernière, qui reçoivent d'autres vis (non représentées), vissées dans des taraudages 30 de la semelle 11.
To immobilize the plate 13 in the angular position corresponding to the inclination o (desired of the axis 7, here are provided
on the one hand, two circular holes 27 formed in the upper part of the plate 13, on either side of the pivot axis 12 of the latter, and receiving with a certain set of screws (not shown), screwed into threads 28 of the sole 11
- on the other hand, two slots 29 formed in the lower part of the plate 13 and centered on the pivot axis 12 of the latter, which receive other screws (not shown), screwed into threads 30 of the sole 11.

La figure 3 montre en outre le détail de l'articulation du bras satellite 5 sur le bras principal 4, dans une réalisation possible. L'axe 8 est soudé au bras satellite 5, et il traverse, avec interposition de roulements à aiguilles 31, la seconde extrémité du bras principal 4 conformée également en manchon 32. Une rondelle 33, retenue au sommet de l'axe 8 au moyen de deux goupilles 34, repose sur le manchon 32 par l'intermédiaire d'une hutée à aiguilles 35. FIG. 3 also shows the detail of the articulation of the satellite arm 5 on the main arm 4, in one possible embodiment. The axis 8 is welded to the satellite arm 5, and it crosses, with the interposition of needle bearings 31, the second end of the main arm 4 also shaped as a sleeve 32. A washer 33, retained at the top of the axis 8 by means of two pins 34, rests on the sleeve 32 by means of a hute with needles 35.

Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de cette potence d'atelier repliable qui a e' été décrite ci-dessus, à titre d'exemple elle en embrasse, au contraire, toutes les variantes de réalisation et d'appiication fondées sur le m & e principe. As it goes without saying, the invention is not limited to the only embodiment of this folding workshop bracket which has been described above, by way of example it embraces, on the contrary, all variants and application based on the same principle.

En particulier, l'on ne s'éloignerait pas du cadre de l'invention en remplaçant le fût 1 par une fixation murale, en modifiant les détails constructifs des deux articulations, ou encore en équipant la potence de divers acces
solres, tels que des raccordements pneumatiques flexibles, en fonction de l'outil ou appareil 6 suspendu au bras satellite 5.
In particular, one would not depart from the framework of the invention by replacing the barrel 1 with a wall fixing, by modifying the constructive details of the two articulations, or even by equipping the stem with various accesses.
earths, such as flexible pneumatic connections, depending on the tool or device 6 suspended from the satellite arm 5.

Claims (4)

REVENDICATIONS 1. - Potence d'atelier repliable, du genre comprenant un bras principal articulé sur un support mural ou sur un fût fixé au sol, et un bras satellite articulé au bras principal, caractérisée en ce que l'axe d'articulation (7) du bras principal (4) sur le support mural ou sur le fût (1), de même que l'axe d'articulation (8) du bras satellite (5) sur le bras principal (4), sont légèrement inclinés sur la verticale de manière à permettre par simple gravité le repliage du bras satellite (5) sous le bras principal (4), et la venue de l'ensemble de ces deux bras (4,5) dans une orientation déterminée, lorsque la potence est libérée. 1. - Foldable workshop bracket, of the type comprising a main arm articulated on a wall support or on a drum fixed to the ground, and a satellite arm articulated on the main arm, characterized in that the articulation axis (7) of the main arm (4) on the wall support or on the barrel (1), as well as the articulation axis (8) of the satellite arm (5) on the main arm (4), are slightly inclined on the vertical so as to allow by simple gravity the folding of the satellite arm (5) under the main arm (4), and the coming of all of these two arms (4,5) in a determined orientation, when the bracket is released. 2. - Potence d'atelier repliable selon la revendication 1, caractérisée en ce qu'en position totalement déployée le bras satellite (5) vu en plan ne se trouve pas exactement dans l'alignement du bras principal (4), et en ce qu'une butée (10) solidaire du bras principal (4) limite le pivotement du bras satellite (5) lorsque ce dernier est parvenu sous le bras principal (4). 2. - foldable workshop bracket according to claim 1, characterized in that in the fully deployed position the satellite arm (5) seen in plan is not exactly in alignment with the main arm (4), and in that that a stop (10) integral with the main arm (4) limits the pivoting of the satellite arm (5) when the latter has reached the main arm (4). 3. - Potence d'atelier repliable selon la revendication 1 ou 2, caractérisée en ce que l'inclinaison (oc) de l'axe d'articulation (7) du bras principal (4) sur le support mural ou sur le fût (1) est réglable de part et d'autre d'une position moyenne verticale. 3. - Foldable workshop bracket according to claim 1 or 2, characterized in that the inclination (oc) of the articulation axis (7) of the main arm (4) on the wall support or on the barrel ( 1) is adjustable on either side of a vertical mean position. 4. - Potence d'atelier repliable selon la revendication 3, caractérisée en ce que le bras principal (4) est articulé sur une platine verticale (13) elle-m & e montée pivotante, suivant un axe horizontal (12), sur le support mural ou sur le fût (1), des moyens à vis (20 à 26) étant prévus pour faire pivoter ladite platine (13), de part et d'autre d'une position moyenne verticale, et modifier ainsi l'inclinaison (o() de l'axe d'articulation (7) du bras principal (4), et d'autres moyens à vis (27\ à 30) étant prévus pour immobiliser la platine (13) dans la position angulaire correspondant à l'inclinaison ( ) désirée de l'axe (7) précité.  4. - Foldable workshop bracket according to claim 3, characterized in that the main arm (4) is articulated on a vertical plate (13) itself m & e pivotally mounted, along a horizontal axis (12), on the wall support or on the barrel (1), screw means (20 to 26) being provided to pivot said plate (13), on either side of an average vertical position, and thus modify the inclination ( o () of the hinge pin (7) of the main arm (4), and other screw means (27 \ to 30) being provided to immobilize the plate (13) in the angular position corresponding to the inclination () desired of the above-mentioned axis (7).
FR8121724A 1981-11-16 1981-11-16 Pivoting hoist jib for workshop - uses pin joints with axles inclined to vertical and arm pivots back under its own Withdrawn FR2516428A1 (en)

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Application Number Priority Date Filing Date Title
FR8121724A FR2516428A1 (en) 1981-11-16 1981-11-16 Pivoting hoist jib for workshop - uses pin joints with axles inclined to vertical and arm pivots back under its own

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Application Number Priority Date Filing Date Title
FR8121724A FR2516428A1 (en) 1981-11-16 1981-11-16 Pivoting hoist jib for workshop - uses pin joints with axles inclined to vertical and arm pivots back under its own

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238292A1 (en) * 1986-03-18 1987-09-23 Willem Marines De Weerd Service boom
FR2841887A1 (en) * 2002-07-08 2004-01-09 Conseils Et D Assistance Des T Jib crane for moving objects in a horizontal plane has vertical tower to which main arm is connected for rotation about main axis, and second arm connected to main arm for rotation about second axis, adjustable via tie rod
US7878347B2 (en) * 2007-12-14 2011-02-01 Gorbel, Inc. Lifting apparatus with compensation means
CN110329924A (en) * 2019-08-15 2019-10-15 常州机电职业技术学院 Air condensing units hoist device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708286A (en) * 1953-12-30 1955-05-17 Tollefson Tollak Gate construction
US3941291A (en) * 1974-08-09 1976-03-02 Hayworth Leil W Pallet jig and table

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708286A (en) * 1953-12-30 1955-05-17 Tollefson Tollak Gate construction
US3941291A (en) * 1974-08-09 1976-03-02 Hayworth Leil W Pallet jig and table

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238292A1 (en) * 1986-03-18 1987-09-23 Willem Marines De Weerd Service boom
FR2841887A1 (en) * 2002-07-08 2004-01-09 Conseils Et D Assistance Des T Jib crane for moving objects in a horizontal plane has vertical tower to which main arm is connected for rotation about main axis, and second arm connected to main arm for rotation about second axis, adjustable via tie rod
US7878347B2 (en) * 2007-12-14 2011-02-01 Gorbel, Inc. Lifting apparatus with compensation means
CN110329924A (en) * 2019-08-15 2019-10-15 常州机电职业技术学院 Air condensing units hoist device
CN110329924B (en) * 2019-08-15 2020-02-18 常州机电职业技术学院 Air condensing units hoist device

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