EP0081404B1 - Ladder stand-off and stabilizing device - Google Patents

Ladder stand-off and stabilizing device Download PDF

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Publication number
EP0081404B1
EP0081404B1 EP19820402045 EP82402045A EP0081404B1 EP 0081404 B1 EP0081404 B1 EP 0081404B1 EP 19820402045 EP19820402045 EP 19820402045 EP 82402045 A EP82402045 A EP 82402045A EP 0081404 B1 EP0081404 B1 EP 0081404B1
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EP
European Patent Office
Prior art keywords
chain
ladder
elements
plane
tube
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.)
Expired
Application number
EP19820402045
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German (de)
French (fr)
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EP0081404A2 (en
EP0081404A3 (en
Inventor
Jean François Archer
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.)
Alufort SA
Original Assignee
Alufort SA
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
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Publication of EP0081404A2 publication Critical patent/EP0081404A2/en
Publication of EP0081404A3 publication Critical patent/EP0081404A3/en
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Publication of EP0081404B1 publication Critical patent/EP0081404B1/en
Expired legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/48Ladder heads; Supports for heads of ladders for resting against objects

Definitions

  • spacer devices which are fixed on the upper part of the ladder and by means of which this upper part can bear on a vertical wall while being kept apart from this wall.
  • These spacer devices generally have a bearing surface greater than the width of the ladder so that they also offer the advantage of increasing the stability of this ladder.
  • the ladder spacers so far produced are most often constituted by a pair of grab bars which are joined to one another by two gutters which can be fitted onto two adjacent bars of the ladder, by a pair of grab bars, each of which can be attached to a ladder upright or carries hooks that can be fitted onto bars of this ladder, or by a U-shaped support element, the central branch of which can be fixed to the uprights of said ladder.
  • these various devices have the disadvantage of being either long to install, or not very safe.
  • US Pat. No. 3,792,750 describes a spacer device comprising two removable support elements, each of which carries, at one of its ends, two cylindrical portions spaced from one another by a distance equal to a multiple of l 'gap between two adjacent hollow bars, and outer diameter substantially equal to the inner diameter of the ends of these bars.
  • the cylindrical portions of the two elements are fitted into the opposite ends of the bars of the ladder so that, when the ladder is supported on a wall, the supporting elements come into contact with this wall at points opposite to the cylindrical portions.
  • the two supporting elements of the spacer device of U.S. Patent 3,792,750 are joined to each other by a bar which is fixed to the elements by screws and nuts.
  • the length of the bar must correspond to the length of the bars so that a given device can only be mounted on a ladder of given width.
  • the width of the scales is very variable from one scale to another and even from one end of the scale to the opposite end; this is particularly the case with sliding ladders, the upper end of which is generally narrower than the lower end resting on the ground.
  • the spacer device is dismantled, it frequently happens that either a screw or a nut is lost and, for this simple fact, the device becomes unusable.
  • US-A-2889099 describes a chain for adjusting the opening angle of a stepladder. This chain is fixed at one end and introduced into a hole for adjusting its length.
  • the present invention relates to a ladder spacer device which overcomes the aforementioned drawback.
  • the device according to the invention is characterized in that the two support elements are connected to each other by a chain, a first end of which passes through an adjustment hole having a first part allowing the chain to slide freely and a second part allowing the chain to be immobilized, said adjustment hole being provided in one of the elements and the chain is terminated by a ferrule whose dimensions are greater than those of the hole so that the chain cannot be separated of the support element, the second end of the chain being either fixed to the other support element, or connected to the latter in the same way as the first end of said chain is to the first element d 'support.
  • the chain may be with links, in which case the adjustment hole may comprise a substantially circular part whose diameter is substantially equal to the width of the links and which is extended by an oblong opening of width substantially equal to the thickness of these links.
  • the cylindrical portions of a support element preferably form an angle greater than 90 ° with the plane of this element. Under these conditions, the ends of the support elements opposite the cylindrical portions, which come into contact with the wall on which the ladder must bear, are spaced from each other by a distance greater than the width of scale, which increases stability.
  • Each of the support elements can be constituted by a round or tube which is folded at an intermediate point of its length and whose ends are themselves folded relative to the plane of the folded central portions of the round or tube so as to be parallel to each other and located on the same side of this plane. These connected ends constitute the cylindrical portions intended to be fitted into the bars of the ladder.
  • the two central portions of the round or tube are advantageously connected to each other by a flat iron comprising the hole and the oblong adjustment opening.
  • the spacer and stabilization device is intended for a ladder comprising two uprights 1 and hollow bars 2, the ends of which pass through the uprights and are crimped outside thereof.
  • the device comprises two support elements 3a and 3b.
  • Each of these support elements consists of a round or tube folded substantially in its middle part, at an acute angle, so as to form two branches 4 and 5.
  • Each of these branches has an extension 6 or 7 which makes a angle greater than 90 °, for example 120 °, with the plane of the branches 4 and 5.
  • These extensions are parallel to each other and located on the same side of this plane, on one side for the part 3a and on the opposite side for part 3b; their spacing is equal to that of two adjacent bars 2 and their outside diameter is substantially equal to the inside diameter of these bars.
  • each of the support elements are connected to each other by a plant 8 provided with a hole 9 extended laterally by an oblong opening 10.
  • the elements 3a and 3b are joined to each other by a chain with links 11.
  • the diameter of the holes 9 is slightly greater than the width of the links of the chain 11, while the width of the openings 10 is slightly greater than the thickness of these links.
  • the chain 11 can slide freely in the holes 8, but is immobilized longitudinally relative to the support piece 3a or 3b if one of its links is engaged in the opening 10 of the flat iron 8 of this support piece; one can also adjust the length of the part of the chain 11 extending between the elements 3a and 3b.
  • the chain 11 is terminated at each of its ends by a stopper tip 12 whose dimensions are greater than those of the holes 9 so that the chain cannot separate from the support pieces 3a and 3b.
  • one of the ends of the chain 11 could be permanently fixed to the neighboring support element 3a or 3b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Description

Il peut arriver que l'extrémité supérieure d'une échelle ne puisse être appliquée directement sur un élément d'appui. C'est le cas, par exemple, lorsqu'on désire avoir accès à une gouttière. On ne peut appliquer l'extrémité supérieure de l'échelle ni sur la gouttière qui n'est pas assez résistante, ni sur le mur que surmonte la gouttière car cette dernière surplomberait alors l'échelle et on n'y aurait pratiquement pas accès.It may happen that the upper end of a ladder cannot be applied directly to a support element. This is the case, for example, when you want to have access to a gutter. You cannot apply the upper end of the ladder either to the gutter, which is not strong enough, or to the wall that the gutter overcomes because the latter would then overhang the ladder and there would be practically no access to it.

Il est connu d'utiliser dans ce cas des dispositifs écarteurs qui se fixent sur la partie supérieure de l'échelle et par l'intermédiaire desquels cette partie supérieure peut prendre appui sur une paroi verticale en étant maintenue écartée de cette paroi. Ces dispositifs écarteurs présentent généralement une surface d'appui supérieure à la largeur de l'échelle de sorte qu'ils offrent en outre l'avantage d'augmenter la stabilité de cette échelle.It is known to use in this case spacer devices which are fixed on the upper part of the ladder and by means of which this upper part can bear on a vertical wall while being kept apart from this wall. These spacer devices generally have a bearing surface greater than the width of the ladder so that they also offer the advantage of increasing the stability of this ladder.

Les dispositifs d'écartement pour échelle jusqu'à présent réalisés sont le plus souvent constitués par une paire de barres d'appui qui sont réunies l'une à l'autre par deux gouttières pouvant être emboîtées sur deux barreaux adjacents de l'échelle, par une paire de barres d'appui dont chacune peut être fixée à un montant de l'échelle ou porte des crochets pouvant être emboîtés sur des barreaux de cette échelle, ou encore par un élément d'appui en U, dont la branche centrale peut être fixée aux montants de ladite échelle. Mais ces divers dispositifs présentent l'inconvénient d'être soit longs à poser, soit peu sûrs.The ladder spacers so far produced are most often constituted by a pair of grab bars which are joined to one another by two gutters which can be fitted onto two adjacent bars of the ladder, by a pair of grab bars, each of which can be attached to a ladder upright or carries hooks that can be fitted onto bars of this ladder, or by a U-shaped support element, the central branch of which can be fixed to the uprights of said ladder. However, these various devices have the disadvantage of being either long to install, or not very safe.

Le brevet U.S.3,792,750 décrit un dispositif d'écartement comportant deux éléments d'appui amovibles dont chacun porte, à l'une de ses extrémités, deux portions cylindriques écartées l'une de l'autre d'une distance égale à un multiple de l'écart entre deux barreaux creux adjacents, et de diamètre extérieur sensiblement égal au diamètre intérieur des extrémités de ces barreaux.US Pat. No. 3,792,750 describes a spacer device comprising two removable support elements, each of which carries, at one of its ends, two cylindrical portions spaced from one another by a distance equal to a multiple of l 'gap between two adjacent hollow bars, and outer diameter substantially equal to the inner diameter of the ends of these bars.

Pour utiliser ce dispositif, on emmanche les portions cylindriques des deux éléments dans les extrémités opposées de barreaux de l'échelle de sorte que, lorsqu'on met l'échelle en appui sur une paroi, les éléments d'appui viennent au contact de cette paroi en des points opposés aux portions cylindriques.To use this device, the cylindrical portions of the two elements are fitted into the opposite ends of the bars of the ladder so that, when the ladder is supported on a wall, the supporting elements come into contact with this wall at points opposite to the cylindrical portions.

Les deux éléments d'appui du dispositif d'écartement du brevet U.S. 3,792,750 sont réunis l'un à l'autre par une barre qui est fixée aux éléments par des vis et des écrous. La longueur de la barre doit correspondre à la longueur des barreaux de sorte qu'un dispositif donné ne peut être monté que sur une échelle de largeur donnée. Or la largeur des échelles est très variable d'une échelle à l'autre et même d'une extrémité de l'échelle à l'extrémité opposée ; c'est le cas notamment des échelles à coulisse dont l'extrémité supérieure est généralement moins large que l'extrémité inférieure reposant sur le sol. Par ailleurs, quand on démonte le dispositif d'écartement, il arrive fréquemment qu'on perde soit une vis, soit un écrou et, pour ce simple fait, le dispositif devient inutilisable.The two supporting elements of the spacer device of U.S. Patent 3,792,750 are joined to each other by a bar which is fixed to the elements by screws and nuts. The length of the bar must correspond to the length of the bars so that a given device can only be mounted on a ladder of given width. Now the width of the scales is very variable from one scale to another and even from one end of the scale to the opposite end; this is particularly the case with sliding ladders, the upper end of which is generally narrower than the lower end resting on the ground. Furthermore, when the spacer device is dismantled, it frequently happens that either a screw or a nut is lost and, for this simple fact, the device becomes unusable.

Le US-A-2889099 décrit une chaîne pour le réglage de l'angle d'ouverture d'un escabeau. Cette chaîne est fixée à une extrémité et introduit dans un trou pour le réglage de sa longueur.US-A-2889099 describes a chain for adjusting the opening angle of a stepladder. This chain is fixed at one end and introduced into a hole for adjusting its length.

La présente invention a pour objet un dispositif d'écartement pour échelle qui remédie à l'inconvénient susmentionné.The present invention relates to a ladder spacer device which overcomes the aforementioned drawback.

Le dispositif selon l'invention est caractérisé en ce que les deux éléments d'appui sont reliés l'un à l'autre par une chaîne dont une première extrémité traverse un trou de réglage ayant une première partie permettant le coulissement libre de la chaîne et une seconde partie permettant l'immobilisation de la chaîne, ledit trou de réglage étant prévu dans l'un des éléments et que la chaîne est terminée par un embout dont les dimensions sont supérieures à celles du trou de sorte que la chaîne ne peut être séparée de l'élément d'appui, la seconde extrémité de la chaîne étant soit fixée à l'autre élément d'appui, soit reliée à celui-ci de la même manière que la première extrémité de ladite chaîne l'est au premier élément d'appui.The device according to the invention is characterized in that the two support elements are connected to each other by a chain, a first end of which passes through an adjustment hole having a first part allowing the chain to slide freely and a second part allowing the chain to be immobilized, said adjustment hole being provided in one of the elements and the chain is terminated by a ferrule whose dimensions are greater than those of the hole so that the chain cannot be separated of the support element, the second end of the chain being either fixed to the other support element, or connected to the latter in the same way as the first end of said chain is to the first element d 'support.

La chaîne peut être à maillons, auquel cas le trou de réglage peut comporter une partie sensiblement circulaire dont le diamètre est sensiblement égal à la largeur des maillons et qui est prolongée par une ouverture oblongue de largeur sensiblement égale à l'épaisseur de ces maillons.The chain may be with links, in which case the adjustment hole may comprise a substantially circular part whose diameter is substantially equal to the width of the links and which is extended by an oblong opening of width substantially equal to the thickness of these links.

Les portions cylindriques d'un élément d'appui font de préférence un angle supérieur à 90° avec le plan de cet élément. Dans ces conditions, les extrémités des éléments d'appui opposées aux portions cylindriques, qui viennent au contact de la paroi sur laquelle l'échelle doit prendre appui, sont écartées l'une de l'autre d'une distance supérieure à la largeur de l'échelle, ce qui augmente la stabilité.The cylindrical portions of a support element preferably form an angle greater than 90 ° with the plane of this element. Under these conditions, the ends of the support elements opposite the cylindrical portions, which come into contact with the wall on which the ladder must bear, are spaced from each other by a distance greater than the width of scale, which increases stability.

Chacun des éléments d'appui peut être constitué par un rond ou tube qui est plié en un point intermédiaire de sa longueur et dont les extrémités sont elles-mêmes repliées par rapport au plan des portions centrales pliées du rond ou tube de façon à être parallèles l'une à l'autre et située du même côté de ce plan. Ces extrémités reliées constituent les portions cylindriques destinées à être emmanchées dans les barreaux de l'échelle.Each of the support elements can be constituted by a round or tube which is folded at an intermediate point of its length and whose ends are themselves folded relative to the plane of the folded central portions of the round or tube so as to be parallel to each other and located on the same side of this plane. These connected ends constitute the cylindrical portions intended to be fitted into the bars of the ladder.

Dans ce cas, les deux portions centrales du rond ou tube sont avantageusement reliées l'une à l'autre par un fer plat comportant le trou et l'ouverture oblongue de réglage.In this case, the two central portions of the round or tube are advantageously connected to each other by a flat iron comprising the hole and the oblong adjustment opening.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation du dispositif selon l'invention, avec référence au dessin annexé dans lequel :

  • La Figure 1 est une vue en perspective de l'extrémité supérieure d'une échelle à laquelle le dispositif est adapté ;
  • La Figure 2 en est une vue en élévation ;
  • La figure 3 en est une coupe transversale suivant III-III de la Figure 2 ;
  • La Figure 4 montre l'utilisation de l'échelle.
An embodiment of the device according to the invention has been described below, by way of non-limiting example, with reference to the appended drawing in which:
  • Figure 1 is a perspective view of the upper end of a ladder to which the device is adapted;
  • Figure 2 is an elevational view thereof;
  • Figure 3 is a cross section along III-III of Figure 2;
  • Figure 4 shows the use of the scale.

Tel qu'il est représenté au dessin, le dispositif d'écartement et de stabilisation est destiné à une échelle comprenant deux montants 1 et des barreaux creux 2 dont les extrémités traversent les montants et sont sertis à l'extérieur de ceux-ci.As shown in the drawing, the spacer and stabilization device is intended for a ladder comprising two uprights 1 and hollow bars 2, the ends of which pass through the uprights and are crimped outside thereof.

Le dispositif comprend deux éléments d'appui 3a et 3b. Chacun de ces éléments d'appui est constitué d'un rond ou tube plié sensiblement dans sa partie médiane, suivant un angle aigu, de façon à former deux branches 4 et 5. Chacune de ces branches comporte un prolongement 6 ou 7 qui fait un angle supérieur à 90°, par exemple de 120°, avec le plan des branches 4 et 5. Ces prolongements sont parallèles l'un à l'autre et situés du même côté de ce plan, d'un côté pour la pièce 3a et du côté opposé pour la pièce 3b ; leur écartement est égal à celui de deux barreaux 2 adjacents et leur diamètre extérieur est sensiblement égal au diamètre intérieur de ces barreaux.The device comprises two support elements 3a and 3b. Each of these support elements consists of a round or tube folded substantially in its middle part, at an acute angle, so as to form two branches 4 and 5. Each of these branches has an extension 6 or 7 which makes a angle greater than 90 °, for example 120 °, with the plane of the branches 4 and 5. These extensions are parallel to each other and located on the same side of this plane, on one side for the part 3a and on the opposite side for part 3b; their spacing is equal to that of two adjacent bars 2 and their outside diameter is substantially equal to the inside diameter of these bars.

Les branches 4 et 5 de chacun des éléments d'appui sont reliées l'une à l'autre par un plant 8 muni d'un trou 9 prolongé latéralement par une ouverture oblongue 10.The branches 4 and 5 of each of the support elements are connected to each other by a plant 8 provided with a hole 9 extended laterally by an oblong opening 10.

Les éléments 3a et 3b sont réunis l'un à l'autre par une chaîne à maillons 11. Le diamètre des trous 9 est légèrement supérieur à la largeur des maillons de la chaîne 11, alors que la largeur des ouvertures 10 est légèrement supérieure à l'épaisseur de ces maillons. Dans ces conditions, la chaîne 11 peut coulisser librement dans les trous 8, mais est immobilisée longitudinalement par rapport à la pièce d'appui 3a ou 3b si l'on engage l'un de ses maillons dans l'ouverture 10 du fer plat 8 de cette pièce d'appui ; on peut aussi régler la longueur de la partie de la chaîne 11 s'étendant entre les éléments 3a et 3b. La chaîne 11 est terminée à chacune de ses extrémités par un embout de butée 12 dont les dimensions sont supérieures à celles des trous 9 de sorte que la chaîne ne peut se séparer des pièces d'appui 3a et 3b.The elements 3a and 3b are joined to each other by a chain with links 11. The diameter of the holes 9 is slightly greater than the width of the links of the chain 11, while the width of the openings 10 is slightly greater than the thickness of these links. Under these conditions, the chain 11 can slide freely in the holes 8, but is immobilized longitudinally relative to the support piece 3a or 3b if one of its links is engaged in the opening 10 of the flat iron 8 of this support piece; one can also adjust the length of the part of the chain 11 extending between the elements 3a and 3b. The chain 11 is terminated at each of its ends by a stopper tip 12 whose dimensions are greater than those of the holes 9 so that the chain cannot separate from the support pieces 3a and 3b.

Lorsqu'on désire mettre l'échelle en appui sur une paroi verticale 13 de façon que son extrémité supérieure soit écartée de cette paroi, comme on le voit à la Figure 4, on emmanche les branches 6 et 7 de l'élément d'appui 3a dans les extrémités de deux barreaux 2 adjacents, par exemple les deux barreaux situés les plus près de cette extrémité supérieure, et on emmanche les branches 6 et 7 de l'élément d'appui 3b dans les extrémités opposées de ces mêmes barreaux, comme on le voit à la Figure 1. Puis on règle la chaîne 11 de façon qu'elle soit légèrement tendue entre les pièces 3a et 3b.When it is desired to put the ladder in abutment on a vertical wall 13 so that its upper end is spaced from this wall, as can be seen in FIG. 4, the branches 6 and 7 of the support element are engaged 3a in the ends of two adjacent bars 2, for example the two bars located closest to this upper end, and the branches 6 and 7 of the support element 3b are fitted into the opposite ends of these same bars, as we see it in Figure 1. Then we adjust the chain 11 so that it is slightly stretched between the parts 3a and 3b.

Lorsque l'utilisateur monte sur l'échelle, son poids tend à écarter l'un de l'autre les coudes 14 des éléments 3a et 3b qui se trouvent au contact de la paroi 13, ce qui tend complètement la chaîne 11. L'utilisateur peut alors avoir facilement accès par exemple à une gouttière 15 surmontant la paroi 13. L'écart entre les coudes 14 est supérieur à la largeur de l'échelle, de sorte que la stabilité de cette dernière est augmentée.When the user climbs the ladder, his weight tends to separate the elbows 14 from the elements 3a and 3b from one another, which are in contact with the wall 13, which completely tightens the chain 11. The user can then have easy access for example to a gutter 15 surmounting the wall 13. The distance between the elbows 14 is greater than the width of the ladder, so that the stability of the latter is increased.

En variante, l'une des extrémités de la chaîne 11 pourrait être fixée à demeure à l'élément d'appui voisin 3a ou 3b.As a variant, one of the ends of the chain 11 could be permanently fixed to the neighboring support element 3a or 3b.

Claims (4)

1. A spacing and stabilizing device for ladders which comprises two removable bearing elements (3a and 3b) each of which has, at one of its ends, two cylindrical portions (6 and 7) spaced apart from each other by a distance equal to the spacing between two adjacent rungs (2) of the ladder, or a multiple of this spacing, and having an outer diameter substantially equal to the inner diameter of the ends of these rungs, characterized in that the two bearing elements (3a and 3b) are joined together by a chain (11) a first end of which passes through an adjusting hole (9-10) having one part (9) allowing the chain (11) to slide freely and a second part (10) allowing the chain to be immobilized, said adjustment hole being provided in one of the elements and in that the chain (11) ends in an end-piece (12) whose dimensions are greater than those of the hole so that the chain cannot be separated from the bearing element, the second end of the chain being either fixed to the other bearing element or connected thereto in the same way as the first end of said chain is connected to the first bearing element.
2. Device according to claim 1, characterized in that the chain is a link chain and in that the adjusting hole comprises a substantially circular part (9) whose diameter is substantially equal to the width of the links and which is extended by an oblong opening (10) of a width substantially equal to the thickness of these links.
3. Device according to claim 1 or 2, wherein each of the bearing elements (3a and 3b) is formed by a round bar of tube which is bent at an intermediate point in its length and whose ends (6 and 7) are themselves bent with respect to the plane of the bent central portions (4 and 5) of the round bar or tube so as to be parallel with one another and situated on the same side of this plane, characterized in that the two central portions (4 and 5) of the round bar or tube are connected to one another by a flat bar (8) comprising the adjusting hole (9-10).
4. Device according to one of the preceding claims, characterized in that the cylindrical portions (6 and 7) of the bearing element form an angle greater than ninety degrees with the plane of this element.
EP19820402045 1981-12-03 1982-11-08 Ladder stand-off and stabilizing device Expired EP0081404B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122971 1981-12-03
FR8122971A FR2517735A1 (en) 1981-12-03 1981-12-03 SPLITTING AND STABILIZATION DEVICE FOR SCALE

Publications (3)

Publication Number Publication Date
EP0081404A2 EP0081404A2 (en) 1983-06-15
EP0081404A3 EP0081404A3 (en) 1983-09-07
EP0081404B1 true EP0081404B1 (en) 1985-01-30

Family

ID=9264808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820402045 Expired EP0081404B1 (en) 1981-12-03 1982-11-08 Ladder stand-off and stabilizing device

Country Status (3)

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EP (1) EP0081404B1 (en)
DE (1) DE3262167D1 (en)
FR (1) FR2517735A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8717870D0 (en) * 1987-07-28 1987-09-03 Ronnoco Eng Ltd Securing means for ladder
US4949810A (en) * 1988-10-03 1990-08-21 Dwinnell Wayne F Attachment to stabilize and expand the use of hollow rung ladders
GB9501796D0 (en) * 1995-01-25 1995-03-22 Bull Jamie 'Bulisario' corner ladder stay
DE19701497A1 (en) * 1997-01-17 1997-07-03 Horst Laug Folding and telescopic supporting outrigger for ladder
CA2268612C (en) * 1999-04-12 2008-09-23 William Stephen Smith Ladder accessories
US6167989B1 (en) 1999-07-16 2001-01-02 Koock Elan Jung Ladder safety device
US6152262A (en) * 1999-08-21 2000-11-28 Jung; Koock E. Ladder top stabilizer device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669248C (en) * 1938-12-20 Adam Schmitt Safety toggle lock for cattle chains
DE543390C (en) * 1932-02-04 Heinrich Schwarzer Device for the articulated attachment of removable supports to free ladders
US2539664A (en) * 1946-11-07 1951-01-30 Sun Oil Co Collapsible safety guard for derrick ladders
US2889099A (en) * 1955-04-01 1959-06-02 M W P Appliances Inc Ladder construction
FR1202991A (en) * 1958-04-18 1960-01-14 Safety tie especially for tying animals with a chain
FR1351393A (en) * 1962-07-13 1964-02-07 Ladder support
US3568801A (en) * 1969-02-28 1971-03-09 H D Werner Co Inc Ladder stabilizing device
US3792750A (en) * 1973-02-20 1974-02-19 B Madison Safety device for ladders

Also Published As

Publication number Publication date
FR2517735A1 (en) 1983-06-10
EP0081404A2 (en) 1983-06-15
EP0081404A3 (en) 1983-09-07
DE3262167D1 (en) 1985-03-14
FR2517735B1 (en) 1984-07-13

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