EP0148056A2 - Universal clamp that cannot be lost for the realisation of electrical clamping connections between two conducting elements - Google Patents
Universal clamp that cannot be lost for the realisation of electrical clamping connections between two conducting elements Download PDFInfo
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- EP0148056A2 EP0148056A2 EP84402493A EP84402493A EP0148056A2 EP 0148056 A2 EP0148056 A2 EP 0148056A2 EP 84402493 A EP84402493 A EP 84402493A EP 84402493 A EP84402493 A EP 84402493A EP 0148056 A2 EP0148056 A2 EP 0148056A2
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- European Patent Office
- Prior art keywords
- stirrup
- screw
- plate
- stirrup plate
- terminal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/301—Clamped connections, spring connections utilising a screw or nut clamping member having means for preventing complete unscrewing of screw or nut
Definitions
- the present invention relates to a universal captive terminal intended to make electrical connections by clamping between two conductive elements such as, for example, an electrical wire and a connection pad of an electrical appliance.
- the first type of terminals does not require any special preparation of the end of the electric wire where the connection must be made, if not a simple stripping, in the case where the electric wire is found covered with an insulation sheath.
- the connection pad is located at the bottom of a cell made in an insulating material body and constituting a guide cage, and has a tapped hole (or even a smooth hole to the right of which is arranged a nut), into which is screwed a clamping screw equipped with a bracket. 1 customarily ment, this stirrup, of width substantially equal to that of the cell, is mounted captively under the screw head (between head and thread).
- the screw is unscrewed and then the end of the wire, if bare, is introduced into the free space between the connection pad and the bracket. The screw is then screwed until the end of the wire is properly compressed between the stirrup and the connection plate.
- the cell comprises, preferably at the opening through which the screwing is practiced, a narrowing, either made in one piece or constituted by an element reported such as a hood.
- the second type of terminal generally called cage terminals, involves a clamping cage open at least at one of its ends to allow the passage of the terminal or possibly the end of a wire and a face provided with '' a threaded hole into which a screw is screwed.
- this cage is mounted inside a cell made in a body of insulating material. To ensure the captivity of the screw, this cell has, at the opening through which the screwing takes place, a narrowing in which comes to abut, at the end of unscrewing, the head of the screw.
- the disadvantage of cage terminals comes from the fact that due to the stresses exerted during the tightening of the screw, the cage must necessarily have walls relatively thick. Consequently, the width of the internal volume of the terminal and therefore the width of the terminal used will be much less than the width of the cell, which is usually imposed for reasons of space, in particular in the case where several identical terminals are juxtaposed. It is clear that the use of closed terminals in such terminals would be contrary to the spirit of the regulations which impose the use of closed terminals, because in the event of incorrect tightening, there is no maintenance of the connection.
- the invention therefore aims to eliminate these drawbacks. It more particularly relates to a universal connection terminal which can receive all kinds of conductors, both electric wires without special preparation, as wires equipped with open or closed terminals of maximum width, this terminal being furthermore equipped with means ensuring the of its components.
- the terminal according to the invention firstly comprises, in a conventional manner: a connection pad disposed at the bottom of a cell formed in a body of insulating material and having a central bore associated with means of screwing ; a clamping screw intended to pass through said bore and to be screwed into the screwing means and a stirrup mounted, preferably captively, under the head of the screw, between head and thread.
- This terminal is more particularly characterized in that it further comprises a stirrup plate, provided with a tapped hole, through which said screw is screwed, this stirrup plate being fitted with retaining means comprising at least one part. forming a stop on which the bracket or the head of the screw comes to bear, after unscrewing the screw, of the connection pad. In this last position, the screw which is still screwed by its end into the threaded bore of the caliper plate can no longer be released due to the stop which prevents any further unscrewing.
- the aforesaid cell comprises a narrowed opening so as to prevent the mobile assembly, formed by the screw, the stirrup, the stirrup plate and the retaining means, from escaping.
- the terminal previously described presents multiple possibilities of use. It is suitable for the connection of closed lugs which, in the unscrewed position of the screw, can engage between the connection pad and the stirrup plate, then be tightened by screwing the screw, the latter then passing through the piercing the terminal. It can also receive, in a similar way, one or more electric wires without any particular preparation.
- the electrical wires can be introduced between the stirrup and the stirrup plate, then be clamped between these two parts.
- This solution facilitates the introduction of the wires thanks to the mobility inside the cell of the assembly formed by the screw, the stirrup and the stirrup plate in the closed position of the screw.
- the retaining means associated with the stirrup plate can be very varied.
- They may for example consist of at least one lateral extension of the stirrup plate, which rises substantially at right angles and comprises at its end a return extending in the passage volume of the stirrup and / or of the head of the screw, so as to limit its axial travel at the end of unscrewing when the screw is released from the threads of the connection pad.
- the stirrup plate comprises two diametrically opposite lateral extensions and therefore has a U-shape whose two ends are folded inwards and extend partially in the passage area of the stirrup and / or the head of the screw.
- the terminal according to the invention applies to the connection of conductive elements of various shapes and types. Among these, it has simply been shown, in FIGS. 1 and 2, that the conductors which are most useful for understanding the operation of the terminal and the advantages which it provides.
- Figure 1 shows an electric wire 1 with stranded conductors 2 wrapped in an electrically insulating sheath 3 and the end of which has been stripped for connection.
- FIG. 2 represents an electric wire 4 of a similar to the previous type, but equipped with a closed terminal 5 comprising a flat connection pane 6 of substantially rectangular shape provided with a central bore 7 and a fixing collar 8 by clamping on the stripped part of the electric wire 4.
- connection terminal firstly comprises a connection area 9r of rectangular shape, coming to be fixed for example by force engagement or by any other means in the bottom of a cell. 10 practiced in a body 11 of insulating material.
- This connection pad connected to the electrical circuit of an appliance, comprises a central threaded hole 12 into which the clamping screw 13 of the terminal can be screwed.
- this central bore 12 could be smooth and arranged in line with a tapped hole provided in the body 11 or produced by a nut secured to the body 11. In both cases, the length of the tapping must be sufficient for the number of threads in engagement allows effective tightening of connections.
- clamping screw 13 is fitted with an elastic stirrup 14 and of curved shape, mounted captively under the head 15 of the screw 13 (between head 15 and thread 16).
- This screw 13 is also screwed before its engagement in the connection area 9 in the threaded bore 18 of a stirrup plate 19 of rectangular shape, made of a thin and slightly elastic sheet.
- the means for retaining the assembly constituted by the screw 13 and the stirrup 14 consist of two tongues 20, 21 extending, at right angles, the stirrup plate 19 in two diametrically opposite locations, adjacent to two opposite angles of said stirrup plate 19.
- These two tabs 20, 21 comprise at their end, at a determined distance from the stirrup plate 19, a part 22, 23 folded at right angles which extends in the direction of the screw 13, as far as the stirrup passage volume 14.
- the ends of these two tabs 22, 23 are are cut in a circle 24 coaxial with the tapped hole 18 and which has a radius slightly greater than that of the head 15 of the screw 13.
- the cell 10 further comprises, at its opening, a narrowing formed as a whole or constituted by an attached element such as a terminal cover cap 26.
- This narrowing makes it possible to maintain the assembly formed by the screw 13, l 'caliper 14, the plate 19 and the tongues 20, 21 inside the cell 10 while allowing it a predetermined axial play j.
- FIGs 6 to 9 illustrate the operation of the terminal previously described.
- the screw in the released position is released from the thread 12 of the connection pad 9, but is however engaged in the caliper plate 19.
- the caliper 14 comes in abutment against the folded parts at right angles 22, 23 of the tongues 20, 21, so that the screw 13 is immobilized.
- the height of the thread of the screw 13 must be approximately equal to the distance separating the stirrup plate 19 from the folded parts at right angles 22, 23.
- an appreciable advantage of the invention consists in that it is possible to deliver the terminals in this loose state, so as to avoid the user an additional operation) to hush up. Indeed, until now, to avoid losing the screws, the terminals were always delivered in the tightened state.
- FIG. 7 illustrates the clearance j which the assembly formed by the screw 13, the stirrup 14, the stirrup plate 19 and the tongues 20, 21 possesses when the terminal is in the tightened state.
- the screw 13 is screwed, screwing during which the screw 13 passes through the bore 7 of the terminal 6 and is screwed into the threaded bore 12 of the connection pad 9. Note that this screwing takes place without difficulty because the screw 13 which is guided by the stirrup plate 19, is rigorously in the axis of the threaded bore 12 of the connection pad 9. During all the screwing, the relative distance between plate 19 and track 9 remains constant and equal to the thickness of the terminals 6.
- the caliper plate 19 emerges from the thread (under-head part 15 of the screw 13) and the tightening is provided between the connection pad 9 and the captive clip 14, the plate ette-caliper 19 playing only a role of force distribution washer (position shown in Figure 9).
- the elasticity of the caliper plate 19 and of the caliper 14 exerts on the screw 13 a tensile force allowing the threading of the caliper plate 19 to be re-engaged on the thread of the screw 13.
- the stirrup plates 19 may consist, for example, as shown in FIG. 11, in a single lateral tab 33, extending, at right angles, the stirrup plate 19 and provided with a return 34 extending in the passage volume of the stirrup .
- the tongue 33 is adjacent to an angle of the stirrup plate 19. It is clear however that this tongue could just as easily extend from a central zone on one side of the caliper plate.
- the retaining means comprise two tongues 35, 36 each provided with a return 37, 38 extending in the passage volume of the stirrup 14. These two tongues 35, 36 are perpendicular to the caliper plate 19 and are respectively adjacent to two central zones on two opposite sides of said caliper plate 19.
- the caliper 14 comprises, projecting from its upper face, two pairs of bosses 40, 41, 42, 43 ensuring its lateral retention when it is in abutment on the returns 37, 38 of the tongues 35,) 36.
- the retaining means may further comprise, as shown in FIG. 13, two diametrically opposite tongues 44, 45, adjacent to two opposite angles of the caliper plate 19 and perpendicular thereto, the ends of which have two returns 46, 47, for example obtained by cutting, which extend in the plane of the tabs 44, 45, parallel to the caliper plate 19.
- the captive stirrup 14 has a rectangular shape of width substantially equal to the distance separating the outer faces of the two tabs 44, 45 and is provided with two rectangular cutouts 48, 49 diametrically opposed for the passage of said tabs 44, 45. This arrangement makes it possible at the same time to guide the stirrup 14 along the tongues 44, 45.
Abstract
Description
La présente invention concerne une borne imperdable universelle destinée à réaliser des connexions électriques par serrage entre deux éléments conducteurs tels que, par exemple, un fil électrique et une plage de raccordement d'un appareil électrique.The present invention relates to a universal captive terminal intended to make electrical connections by clamping between two conductive elements such as, for example, an electrical wire and a connection pad of an electrical appliance.
D'une manière générale, on sait que selon l'état actuel de la technique, il existe au moins deux types principaux de bornes servant à effectuer de telles connexions.In general, it is known that according to the current state of the art, there are at least two main types of terminals used to make such connections.
Le premier type de bornes, généralement appelées bornes à étrier, ne nécessite pas de préparation particulière de l'extrémité du fil électrique où doit s'effectuer la connexion, si ce n'est un simple dénudage, dans le cas où le fil électrique se trouve recouvert d'une gaine d'isolation. Selon ce premier type de bornes, la plage de raccordement se trouve disposée au fond d'un alvéole pratiqué dans un corps en matière isolante et constituant'une cage de guidage, et présente un perçage taraudé (ou même un perçage lisse au droit duquel est disposé un écrou), dans lequel vient se visser une vis de serrage équipée d'un étrier. Habituelle- 1 ment, cet étrier, de largeur sensiblement égale à celle de l'alvéole, est monté de façon imperdable sous la tête de la vis (entre tête et filetage). Ainsi, pour effectuer une connexion avec un fil électrique, on dévisse la vis puis on introduit l'extrémité du fil éventuellement dénudé dans l'intervalle libre entre la plage de raccordement et l'étrier. On procède ensuite au vissage de la vis jusqu'à ce que l'extrémité du fil se trouve convenablement comprimée entre l'étrier et la plaque de raccordement. Pour éviter que l'ensemble formé par la vis et son étrier ne puisse se perdre, l'alvéole comprend, de préférence au niveau de l'ouverture par laquelle on pratique le vissage, un rétrécissement, soit venu de matière ou constitué par un élément rapporté tel qu'un capot.The first type of terminals, generally called clamp terminals, does not require any special preparation of the end of the electric wire where the connection must be made, if not a simple stripping, in the case where the electric wire is found covered with an insulation sheath. According to this first type of terminal, the connection pad is located at the bottom of a cell made in an insulating material body and constituting a guide cage, and has a tapped hole (or even a smooth hole to the right of which is arranged a nut), into which is screwed a clamping screw equipped with a bracket. 1 customarily ment, this stirrup, of width substantially equal to that of the cell, is mounted captively under the screw head (between head and thread). So, to perform a connection with an electric wire, the screw is unscrewed and then the end of the wire, if bare, is introduced into the free space between the connection pad and the bracket. The screw is then screwed until the end of the wire is properly compressed between the stirrup and the connection plate. To prevent the assembly formed by the screw and its stirrup from being lost, the cell comprises, preferably at the opening through which the screwing is practiced, a narrowing, either made in one piece or constituted by an element reported such as a hood.
Ainsi, en fin de dévissage de la vis, l'étrier vient en butée sur le rétrécissement de l'alvéole et se trouve bloqué, de sorte qu'elle ne peut pas s'égarer.Thus, at the end of the unscrewing of the screw, the stirrup stops against the narrowing of the cell and is blocked, so that it cannot get lost.
Le deuxième type de bornes, généralement appelées bornes à cage, fait intervenir une cage de serrage ouverte au moins à l'une de ses extrémités pour permettre le passage de la cosse ou éventuellement de l'extrémité d'un fil et une face munie d'un perçage taraudé dans lequel vient se visser une vis. De même que précédemment, cette cage se trouve montée à l'intérieur d'un alvéole pratiqué dans un corps en matière isolante. Pour assurer l'imperdabilité de la vis, cet alvéole présente, au niveau de l'ouverture par laquelle s'effectue le vissage, un rétrécissement dans lequel vient , buter, en fin de dévissage, la tête de la vis.The second type of terminal, generally called cage terminals, involves a clamping cage open at least at one of its ends to allow the passage of the terminal or possibly the end of a wire and a face provided with '' a threaded hole into which a screw is screwed. As previously, this cage is mounted inside a cell made in a body of insulating material. To ensure the captivity of the screw, this cell has, at the opening through which the screwing takes place, a narrowing in which comes to abut, at the end of unscrewing, the head of the screw.
On constate que ces deux types de bornes ne conviennent pas pour la connexion de fils équipés de cosses fermées dont l'usage se trouve imposé par certains règlements et qui présentent un trou au travers duquel la vis de serrage doit 1 obligatoirement passer.It is noted that these two types of terminals are not suitable for the son of connection equipped with closed contacts whose use is imposed by certain regulations and have a hole through which the clamping screw 1 must necessarily pass.
En effet, dans le cas d'une borne à étrier, il serait nécessaire, pour monter la cosse, d'ôter au préalable l'ensemble vis-étrier, ce qui est incompatible avec l'imperdabilité de ce montage.Indeed, in the case of a clamp terminal, it would be necessary, to mount the terminal, to remove the screw-clamp assembly beforehand, which is incompatible with the imperdability of this assembly.
i Par ailleurs, l'inconvénient des bornes à cage provient du fait qu'en raison des contraintes exercées lors du serrage de la vis, la cage doit nécessairement présenter des parois relativement épaisses. En conséquence, la largeur du volume intérieur de la cosse et donc la largeur de la cosse utilisée seront nettement inférieures à la largeur de l'alvéole, laquelle est habituellement imposée pour des raisons d'encombrement, en particulier dans le cas où plusieurs bornes identiques se trouvent juxtaposées. Il est clair que l'utilisation de cosses fermées dans de telles bornes serait contraire à l'esprit des règlements qui imposent l'usage des cosses fermées, car en cas de mauvais serrage, il n'y a pas maintien de la connexion.i Furthermore, the disadvantage of cage terminals comes from the fact that due to the stresses exerted during the tightening of the screw, the cage must necessarily have walls relatively thick. Consequently, the width of the internal volume of the terminal and therefore the width of the terminal used will be much less than the width of the cell, which is usually imposed for reasons of space, in particular in the case where several identical terminals are juxtaposed. It is clear that the use of closed terminals in such terminals would be contrary to the spirit of the regulations which impose the use of closed terminals, because in the event of incorrect tightening, there is no maintenance of the connection.
L'invention a donc pour but de supprimer ces inconvénients. Elle a plus particulièrement pour objet une borne de raccordement universelle pouvant recevoir toutes sortes de conducteurs, aussi bien des fils électriques sans préparation particulière, que des fils équipés de cosses ouvertes ou fermées de largeur maximale, cette borne étant en outre équipée de moyens assurant l'imperdabilité de ses composants.The invention therefore aims to eliminate these drawbacks. It more particularly relates to a universal connection terminal which can receive all kinds of conductors, both electric wires without special preparation, as wires equipped with open or closed terminals of maximum width, this terminal being furthermore equipped with means ensuring the of its components.
Pour parvenir à ces résultats, la borne selon l'invention comprend tout d'abord, de façon classique : une plage de raccordement disposée au fond d'un alvéole pratiqué dans un corps en matière isolante et présentant un perçage central associé à des moyens de vissage ; une vis de serrage destinée à passer au travers dudit perçage et à venir se visser dans les moyens de vissage et un étrier monté, de préférence de façon imperdable, sous la tête de la vis, entre tête et filetage.To achieve these results, the terminal according to the invention firstly comprises, in a conventional manner: a connection pad disposed at the bottom of a cell formed in a body of insulating material and having a central bore associated with means of screwing ; a clamping screw intended to pass through said bore and to be screwed into the screwing means and a stirrup mounted, preferably captively, under the head of the screw, between head and thread.
Cette borne est plus particulièrement caractérisée en ce qu'elle comporte en outre une plaquette-étrier, munie d'un perçage taraudé, au travers duquel vient se visser ladite vis, cette plaquette-étrier étant équipée de moyens de retenue comportant au moins une partie formant butée sur laquelle vient porter l'étrier ou la tête de la vis, à l'issue du dévissage de la vis, de la plage de raccordement. Dans cette dernière position, la vis qui se trouve encore vissée par son extrémité dans le perçage taraudé de la plaquette-étrier ne peut plus se dégager en raison de la butée qui interdit tout dévissage supplémentaire.This terminal is more particularly characterized in that it further comprises a stirrup plate, provided with a tapped hole, through which said screw is screwed, this stirrup plate being fitted with retaining means comprising at least one part. forming a stop on which the bracket or the head of the screw comes to bear, after unscrewing the screw, of the connection pad. In this last position, the screw which is still screwed by its end into the threaded bore of the caliper plate can no longer be released due to the stop which prevents any further unscrewing.
Par ailleurs, le susdit alvéole comprend une ouverture rétrécie de manière à empêcher l'ensemble mobile, formé par la vis, l'étrier, la plaquette-étrier et les moyens de retenue, de s'échapper.Furthermore, the aforesaid cell comprises a narrowed opening so as to prevent the mobile assembly, formed by the screw, the stirrup, the stirrup plate and the retaining means, from escaping.
La borne précédemment décrite présente de multiples possibilités d'utilisation. Elle convient à la connexion de cosses fermées qui, en position dévissée de la vis, peuvent venir s'engager entre la plage de raccordement et la plaquette-étrier, puis être serrées par vissage de la vis, celle-ci passant alors au travers du perçage de la cosse. Elle peut également recevoir, d'une façon analogue, un ou plusieurs fils électriques sans préparation particulière.The terminal previously described presents multiple possibilities of use. It is suitable for the connection of closed lugs which, in the unscrewed position of the screw, can engage between the connection pad and the stirrup plate, then be tightened by screwing the screw, the latter then passing through the piercing the terminal. It can also receive, in a similar way, one or more electric wires without any particular preparation.
Selon un autre mode d'utilisation, les fils électriques peuvent être introduits entre l'étrier et la plaquette-étrier, puis être serrés entre ces deux pièces. Cette solution facilite l'introduction des fils grâce à la mobilité à l'intérieur de l'alvéole de l'ensemble formé par la vis, l'étrier et la plaquette-étrier en position fermée de la vis.According to another mode of use, the electrical wires can be introduced between the stirrup and the stirrup plate, then be clamped between these two parts. This solution facilitates the introduction of the wires thanks to the mobility inside the cell of the assembly formed by the screw, the stirrup and the stirrup plate in the closed position of the screw.
Les moyens de retenue associés à la plaquette-étrier peuvent être très variés.The retaining means associated with the stirrup plate can be very varied.
Ils peuvent par exemple consister en au moins un prolongement latéral de la plaquette-étrier, qui s'élève sensiblement à angle droit et comprend à son extrémité un retour s'étendant dans le volume de passage de l'étrier et/ou de la tête de la vis, de manière à limiter sa course axiale en fin de dévissage lorsque la vis s'est dégagée des filets de la plage de raccordement.They may for example consist of at least one lateral extension of the stirrup plate, which rises substantially at right angles and comprises at its end a return extending in the passage volume of the stirrup and / or of the head of the screw, so as to limit its axial travel at the end of unscrewing when the screw is released from the threads of the connection pad.
Selon un mode d'exécution avantageux de l'invention, la plaquette-étrier comprend deux prolongements latéraux diamétralement opposés et présente, de ce fait, une forme en U dont les deux extrémités se trouvent repliées vers l'intérieur et s'étendent partiellement dans la zone de passage de l'étrier et/ou de la tête de la vis.According to an advantageous embodiment of the invention, the stirrup plate comprises two diametrically opposite lateral extensions and therefore has a U-shape whose two ends are folded inwards and extend partially in the passage area of the stirrup and / or the head of the screw.
Des modes de réalisation de l'invention seront décrits ci-après, à titre d'exemples non limitatifs, avec référence aux dessins annexés dans lesquels :
- Les figures 1 et 2 représentent, en perspective, l'extrémité de deux fils électriques, à savoir, un fil électrique simplement dénudé (figure 1) et un fil équipé d'une cosse fermée (figure 2)
- Les figures 3 et 4 représentent, en vue de côté (figure 3) et en vue de dessus (figure 4), les éléments constitutifs d'une borne universelle imperdable selon l'invention
- La figure 5 est une vue en perspective des éléments représentés figures 3 et 4 logés à l'intérieur d'un alvéole ;
- Les figures 6 à 9 sont des coupes schématiques d'une borne du type de celle représentée figures 3 à 5, permettant d'illustrer le principe de fonctionnement de cette borne, notamment dans son application à la connexion d'une cosse fermée ;
- La figure 10 est une vue de côté de l'ensemble représenté figures 3 et 4, cette vue permettant d'illustrer un autre type d'application de la borne ;
- Les figures 11, 12 et 13 représentent, en perspective, trois variantes d'exécution des moyens de retenue utilisables dans une borne selon l'invention.
- Figures 1 and 2 show, in perspective, the end of two electric wires, namely, a simply stripped electric wire (Figure 1) and a wire equipped with a closed terminal (Figure 2)
- Figures 3 and 4 show, in side view (Figure 3) and in top view (Figure 4), the components of a captive universal terminal according to the invention
- Figure 5 is a perspective view of the elements shown in Figures 3 and 4 housed inside a cell;
- Figures 6 to 9 are schematic sections of a terminal of the type shown in Figures 3 to 5, to illustrate the operating principle of this terminal, especially in its application to the connection of a closed terminal;
- Figure 10 is a side view of the assembly shown in Figures 3 and 4, this view to illustrate another type of application of the terminal;
- Figures 11, 12 and 13 show, in perspective, three alternative embodiments of the retaining means usable in a terminal according to the invention.
Comme précédemment mentionné, la borne selon l'invention ! s'applique à la connexion d'éléments conducteurs de formes et de types variés. Parmi ceux-ci, on a simplement représenté, sur les figures 1 et 2, que les conducteurs qui sont les plus utiles pour la compréhension du fonctionnement de la borne et des avantages qu'elle procure.As previously mentioned, the terminal according to the invention! applies to the connection of conductive elements of various shapes and types. Among these, it has simply been shown, in FIGS. 1 and 2, that the conductors which are most useful for understanding the operation of the terminal and the advantages which it provides.
i Ainsi, la figure 1 représente un fil électrique 1 à conducteurs multibrins 2 enrobé dans une gaine électriquement isolante 3 et dont l'extrémité a été dénudée en vue de sa connexion. La figure 2 représente un fil électrique 4 d'un type analogue au précédent, mais équipé d'une cosse fermée 5 comprenant une pane de connexion plate 6 de forme sensiblement rectangulaire munie d'un perçage central 7 et un collier de fixation 8 par serrage sur la partie dénudée du fil électrique 4.i Thus, Figure 1 shows an electric wire 1 with stranded
Telle que représentée sur les figures 3 à 5, la borne de connexion comprend tout d'abord une plage de raccordement 9r de forme rectangulaire, venant- se fixer par exemple par engagement à force ou par tout autre moyen dans le fond d'un alvéole 10 pratiqué dans un corps 11 en matière isolante. Cette plage de raccordement 9, connectée au circuit électrique d'un appareil, comprend un perçage central taraudé 12 dans lequel peut venir se visser la vis de serrage 13 de la borne. Comme précédemment mentionné, ce perçage central 12 pourrait être lisse et disposé au droit d'un perçage taraudé prévu dans le corps 11 ou réalisé par un écrou solidaire du corps 11. Dans les deux cas, la longueur du taraudage doit être suffisante pour que le nombre de filets en prise permette le serrage efficace des connexions.As shown in FIGS. 3 to 5, the connection terminal firstly comprises a connection area 9r of rectangular shape, coming to be fixed for example by force engagement or by any other means in the bottom of a cell. 10 practiced in a
Par ailleurs, la vis de serrage 13 se touve équipée d'un étrier élastique 14 et de forme incurvée, monté de façon imperdable sous la tête 15 de la vis 13 (entre tête 15 et filet 16).Furthermore, the
Cette vis 13 vient en outre se visser avant son engagement dans la plage de raccordement 9 dans le perçage taraudé 18 d'une plaquette-étrier 19 de forme rectangulaire, réalisée en une tôle mince et légèrement élastique.This
Dans l'exemple représenté, les moyens de retenue de l'ensemble constitué par la vis 13 et l'étrier 14 consistent en deux languettes 20, 21 prolongeant, à angle droit, la plaquette-étrier 19 en deux emplacements diamétralement opposés, adjacents à deux angles opposés de ladite plaquette-étrier 19. Ces deux languettes 20, 21 comprennent à leur extrémité, à une distance déterminée de la plaquette-étrier 19, une partie 22, 23 repliée à angle droit qui s'étend en direction de la vis 13, jusque dans le volume de passage de l'étrier 14. Les extrémités de ces deux languettes 22, 23 se trouvent découpées selon un cercle 24 coaxial au perçage taraudé 18 et qui présente un rayon légèrement supérieur à celui de la tête 15 de la vis 13.In the example shown, the means for retaining the assembly constituted by the
L'alvéole 10 comprend en outre, au niveau de son ouverture, un rétrécissement venu de matière ou constitué par un élément rapporté tel qu'un capot cache-bornes 26. Ce rétrécissement permet de maintenir l'ensemble formé par la vis 13, l'étrier 14, la plaquette 19 et les languettes 20, 21 à l'intérieur de l'alvéole 10 tout en lui autorisant un jeu axial j prédéterminé.The
Les figures 6 à 9 permettent d'illustrer le fonctionnement de la borne précédemment décrite. Ainsi, dans l'exemple représenté figure 6, la vis en position desserrée se trouve dégagée du taraudage 12 de la plage de raccordement 9, mais se trouve cependant engagée dans la plaquette-étrier 19. Dans cette position, l'étrier 14 vient en butée contre les parties repliées à angle droit 22, 23 des languettes 20, 21, de sorte que la vis 13 se trouve immobilisée. Pour parvenir à ce résultat, la hauteur du filetage de la vis 13 doit être sensfblement égale à la distance séparant la plaquette-étrier 19 des parties repliées à angle droit 22, 23.Figures 6 to 9 illustrate the operation of the terminal previously described. Thus, in the example shown in Figure 6, the screw in the released position is released from the
Dans cette position, la borne se trouve à l'état desserré, état dans lequel il est possible d'engager les conducteurs soit dans l'intervalle compris entre la plaquette-étrier 19 i et l'étrier 14 ou dans l'intervalle compris entre la plaquette étrier 19 et la plage de connexion 9. Ainsi, un avantage appréciable de l'invention consiste en ce qu'il est possible de livrer les bornes dans cet état desserré, de manière à éviter à l'utilisateur une opération supplémen- ) taire. En effet, jusqu'ici, pour éviter de perdre les vis, les bornes étaient toujours livrées à l'état serré.In this position, the terminal is in the loose state, in which it is possible to engage the conductors either in the interval between the stirrup plate 19 i and the
La figure 7 illustre le jeu j que possède l'ensemble formé par la vis 13, l'étrier 14, la plaquette-étrier 19 et les languettes 20, 21, lorsque la borne se trouve à l'état des- > serré.FIG. 7 illustrates the clearance j which the assembly formed by the
Grâce à ce jeu, il est possible d'engager, entre la plaquette-étrier 19 disposée en position soulevée et la plage de connexion 9, une ou plusieurs cosses fermées 6, comme représenté figure 8, il peut être avantageusement prévu une capacité de deux cosses introduites tête bêche. De même, l'introduction de fils électriques entre l'étrier 14 et la plaquette-étrier 19 de la façon illustrée sur la figure 10, se trouve considérablement facilitée. On remarquera que la largeur de la cosse fermée 6 utilisée figure 8 est sensiblement égale à la largeur de l'alvéole 10, contrairement à un montage à cage classique, l'épaisseur de la cage n'intervenant pas.Thanks to this play, it is possible to engage, between the
Une fois la ou les cosses 6 engagées, la poussée nécessairement exercée lors du vissage sur la tête de la vis par le tournevis, plaque, par l'intermédiaire de la plaquette-étrier 19, la ou les cosses 6 sur la plage de connexion 9 pour aboutir à la position représentée sur la figure 8. On procède ensuite au vissage de la vis 13, vissage au cours duquel la vis 13 traverse le perçage 7 de la cosse 6 et vient se visser dans le perçage taraudé 12 de la plage de connexion 9. On notera que ce vissage s'opère sans difficulté du fait que la vis 13 qui se trouve guidée par la plaquette-étrier 19, se présente rigoureusement dans l'axe du perçage taraudé 12 de la plage de connexion 9. Pendant tout le vissage, la distance relative entre plaquette 19 et plage 9 reste constante et égale à l'épaisseur des cosses 6. En fin de vissage, la plaquette-étrier 19 se dégage du filet (partie sous tête 15 de la vis 13) et le serrage est assuré entre la plage de raccordement 9 et l'étrier imperdable 14, la plaquette-étrier 19 ne jouant plus qu'un rôle de rondelle de répartition d'effort (position représentée sur la figure 9). Au dévissage, l'élasticité de la plaquette-étrier 19 et de l'étrier 14 exerce sur la vis 13 un effort de traction permettant le réengagement du taraudage de la plaquette-étrier 19 sur le filet de la vis 13. Pour parvenir à ce résultat, il convient de faire en sorte que la hauteur utile h de dégagement sous tête des filets de la vis 13 soit à peine supérieure à l'épaisseur de la plaquette-étrier 19. L'utilisation de la borne précédemment décrite pour le serrage de fils sans préparation est évidente, comme le montre la figure 10. Comme précédemment mentionné, l'introduction des extrémités des fils 30, 31 entre l'étrier 14 et la plaquette-étrier 19 se trouve facilitée, d'une part, en raison du fait que la vis se trouve à l'origine en position desserrée et, d'autre part, en raison du jeu de l'ensemble mobile 13, 14, 19, 20, 21, 22, 23 dans l'alvéole 10. Ici encore, l'effort préparatoire au vissage vient plaquer la plaquette-étrier 19 sur la plage de raccordement 9. En fin de vissage, la réaction de serrage entre l'étrier 14 et la plage de raccordement 9 n'entraîne que le rattrapage des jeux de filets entre la plaquette-étrier 19 et la vis 13. Bien entendu, l'invention ne se limite pas aux formes de réalisation précédemment décrites. On notera en particulier que les moyens de retenue associés à la plaquette-étrier peuvent présenter des formes différentes.Once the lug (s) 6 are engaged, the thrust necessarily exerted during screwing on the head of the screw by the screwdriver, plate, via the
Ils peuvent consister par exemple, comme représenté sur la figure 11, en une seule languette latérale 33, prolongeant, à angle droit, la plaquette-étrier 19 et munie d'un retour 34 s'étendant dans le volume de passage de l'étrier. Dans i l'exemple représenté sur cette figure, la languette 33 est adjacente à un angle de la plaquette-étrier 19. Il est clair cependant que cette languette pourrait tout aussi bien s'étendre à partir d'une zone centrale d'un côté de la plaquette-étrier.They may consist, for example, as shown in FIG. 11, in a
i Dans l'exemple représenté sur la figure 12, les moyens de retenue comprennent deux languettes 35, 36 munies chacune d'un retour 37, 38 s'étendant dans le volume de passage de l'étrier 14. Ces deux languettes 35, 36 sont perpendiculaires à la plaquette-étrier 19 et sont respectivement attenan- ) tes à deux zones centrales de deux côtés opposés de ladite plaquette-étrier 19. Dans cet exemple, l'étrier 14 comprend, en saillie sur sa face supérieure, deux couples de bossages 40, 41, 42, 43 assurant son maintien latéral lorsqu'il se trouve en butée sur les retours 37, 38 des languettes 35, ) 36.i In the example shown in FIG. 12, the retaining means comprise two
Les moyens de retenue peuvent en outre comprendre, comme représenté sur la figure 13, deux languettes 44, 45 diamétralement opposées, adjacentes à deux angles opposés de la plaquette-étrier 19 et perpendiculaires à celle-ci, dont les extrémités comportent deux retours 46, 47, par exemple obtenus par découpe, qui s'étendent dans le plan des languettes 44, 45, parallèlement à la plaquette-étrier 19. Dans ce cas, l'étrier imperdable 14 présente une forme rectangulaire de largeur sensiblement égale à la distance séparant les faces extérieures des deux languettes 44, 45 et est muni de deux découpes rectangulaires 48, 49 diamétralement opposées pour le passage desdites languettes 44, 45. Cette disposition permet d'assurer en même temps un guidage de l'étrier 14 le long des languettes 44, 45.The retaining means may further comprise, as shown in FIG. 13, two diametrically
Claims (7)
caractérisée en ce qu'elle comporte en outre, guidée à l'intérieur de l'alvéole (10), un ensemble mobile comprenant une plaquette-étrier (19), munie d'un perçage taraudé (18) au travers duquel vient se visser ladite vis (13), cette plaquette étrier (19) étant équipée de moyens de retenue comportant au moins une partie (22, 23) formant butée, sur laquelle vient porter l'étrier (14) de la vis (13), à l'issue du dévissage de la vis (13) de la plage de raccordement (9) de manière à ce que, dans cette position, la vis demeure sensiblement dans l'axe du perçage (12) de la plage de raccordement (9), quelle que soit la position dudit ensemble mobile à l'intérieur de l'alvéole (10).1. Universal captive terminal intended for making electrical connections by clamping between two conductive elements, this terminal comprising a connection pad (9) disposed at the bottom of a cell (10) formed in a body (11) made of insulating material, and having a central bore (12) associated with screwing means, a clamping screw (13) intended to pass through said bore (12) and to be screwed into the screwing means, and a stirrup (14) mounted , preferably captive, under the head (15) of the screw (13), between head and thread,
characterized in that it further comprises, guided inside the cell (10), a mobile assembly comprising a stirrup plate (19), provided with a tapped hole (18) through which is screwed said screw (13), this stirrup plate (19) being equipped with retaining means comprising at least one part (22, 23) forming a stop, on which comes the stirrup (14) of the screw (13), at the 'after unscrewing the screw (13) from the connection area (9) so that, in this position, the screw remains substantially in the axis of the bore (12) of the connection area (9), whatever the position of said movable assembly inside the cell (10).
en ce que la plaquette-étrier (19) présente une élasticité de manière à ce qu'en début de dévissage, cette élasticité exerce sur la vis (13} un effort de traction permettant le réengagement du taraudage de la plaquette-étrier (19) sur le filet de la vis (13).3. Captive terminal according to claim 1, characterized in that the clamping screw (13) has a clearance height between head and thread in which, at the end of screwing, the stirrup plate (19) is released from the threads of the screws (13), and
in that the stirrup plate (19) has an elasticity so that at the beginning of unscrewing, this elasticity exerts on the screw (13} a tensile force allowing the re-engagement of the thread of the caliper plate (19) on the thread of the screw (13).
en ce que l'étrier (14) présente deux découpes correspondantes diamétralement opposées pour le passage desdites languettes (44, 45).7. Terminal according to one of claims 1 to 5, characterized in that the aforesaid stirrup plate (19) comprises two diametrically opposite tongues (44, 45), rising perpendicular to said stirrup plate (19) and of which the ends have two returns (46, 47) extending in the plane of the tongues (44, 45) parallel to said stirrup plate (19), and
in that the stirrup (14) has two corresponding diametrically opposite cutouts for the passage of said tongues (44, 45).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84402493T ATE29630T1 (en) | 1983-12-30 | 1984-12-05 | NON-RELEASING UNIVERSAL CLAMP FOR THE IMPLEMENTATION OF ELECTRICAL CRIMP CONNECTIONS BETWEEN TWO CONDUCTING ELEMENTS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8321084A FR2557739B1 (en) | 1983-12-30 | 1983-12-30 | UNIVERSAL IMPERDABLE TERMINAL FOR MAKING ELECTRICAL CONNECTIONS BY TIGHTENING BETWEEN TWO CONDUCTIVE ELEMENTS |
FR8321084 | 1983-12-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0148056A2 true EP0148056A2 (en) | 1985-07-10 |
EP0148056A3 EP0148056A3 (en) | 1985-08-07 |
EP0148056B1 EP0148056B1 (en) | 1987-09-09 |
Family
ID=9295750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84402493A Expired EP0148056B1 (en) | 1983-12-30 | 1984-12-05 | Universal clamp that cannot be lost for the realisation of electrical clamping connections between two conducting elements |
Country Status (9)
Country | Link |
---|---|
US (1) | US4611876A (en) |
EP (1) | EP0148056B1 (en) |
JP (1) | JPS60158567A (en) |
AT (1) | ATE29630T1 (en) |
BR (1) | BR8406720A (en) |
CA (1) | CA1227843A (en) |
DE (1) | DE3466140D1 (en) |
FR (1) | FR2557739B1 (en) |
HK (1) | HK33488A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991017588A1 (en) * | 1990-05-02 | 1991-11-14 | Naimer, Hubert, Laurenz | Screw-on terminal |
FR2667989A1 (en) * | 1990-10-16 | 1992-04-17 | Telemecanique Sa | CONNECTING TERMINAL WITH IMPERSIBLE SCREW AND TERMINAL BOARD USING TERMINALS OF THIS KIND. |
EP0749179A1 (en) * | 1995-06-16 | 1996-12-18 | Naimer, Hubert Laurenz | Screw clamp |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2611995B1 (en) * | 1987-03-05 | 1993-05-07 | Telemecanique Electrique | SCREW CONNECTION DEVICE FOR ELECTRICAL CONDUCTOR |
CH672967A5 (en) * | 1987-03-27 | 1990-01-15 | Sprecher & Schuh Ag | |
US5647613A (en) * | 1995-08-15 | 1997-07-15 | Thomas & Betts Corporation | Connector for retentively terminating electrical conduit |
USD381630S (en) * | 1995-11-08 | 1997-07-29 | Wpfy, Inc. | Duplex cable connector |
USD380197S (en) * | 1996-01-30 | 1997-06-24 | AFC Cable Systems, Inc. | Cable connector |
US7097502B2 (en) * | 2003-05-13 | 2006-08-29 | Tyco Electronics Corporation | Terminal block assembly |
TW201036278A (en) * | 2009-03-27 | 2010-10-01 | Furutech Co Ltd | Stereo wire connector |
DE102016122852A1 (en) * | 2016-11-28 | 2018-05-30 | Abb Schweiz Ag | Installation switching device with contact terminal |
AU2021101027A4 (en) * | 2021-02-24 | 2021-04-29 | Sicame Australia Pty Ltd | A reusable mains-power electrical connector |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260989A (en) * | 1964-08-27 | 1966-07-12 | Curtis Dev & Mfg Co | Captivated screw |
DE1225727B (en) * | 1964-03-24 | 1966-09-29 | Siemens Ag | Flat terminal for connecting electrical lines |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2397102A (en) * | 1942-10-28 | 1946-03-26 | Westinghouse Electric Corp | Terminal block |
US3083348A (en) * | 1959-07-09 | 1963-03-26 | Edmond C Crowther | Electrical connector |
US3238495A (en) * | 1964-04-17 | 1966-03-01 | Illinois Tool Works | Electrical connector |
GB1154178A (en) * | 1966-03-10 | 1969-06-04 | Telemecanique Electrique | Improvements in or relating to Electrical Connection Terminals |
DE2452091C3 (en) * | 1974-11-02 | 1979-01-11 | Danfoss A/S, Nordborg (Daenemark) | Device for clamping conductors to be electrically connected to one another |
GB1493220A (en) * | 1976-10-12 | 1977-11-30 | Pye Ltd | Screw or nut and a washer intended to be held captive thereon |
FR2432779A1 (en) * | 1978-08-02 | 1980-02-29 | Mars Actel | Junction strip esp. for hot plates - has two folded components separated by cross and lengthways insulating walls |
SU815801A1 (en) * | 1979-01-18 | 1981-03-23 | Рижский Опытный Завод Средствмеханизации | Connecting terminal for wires |
US4273408A (en) * | 1979-02-21 | 1981-06-16 | General Electric Company | Terminal block assembly |
-
1983
- 1983-12-30 FR FR8321084A patent/FR2557739B1/en not_active Expired
-
1984
- 1984-12-05 AT AT84402493T patent/ATE29630T1/en not_active IP Right Cessation
- 1984-12-05 DE DE8484402493T patent/DE3466140D1/en not_active Expired
- 1984-12-05 EP EP84402493A patent/EP0148056B1/en not_active Expired
- 1984-12-20 CA CA000470674A patent/CA1227843A/en not_active Expired
- 1984-12-26 BR BR8406720A patent/BR8406720A/en not_active IP Right Cessation
- 1984-12-26 US US06/686,558 patent/US4611876A/en not_active Expired - Fee Related
- 1984-12-27 JP JP59282002A patent/JPS60158567A/en active Granted
-
1988
- 1988-05-02 HK HK334/88A patent/HK33488A/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1225727B (en) * | 1964-03-24 | 1966-09-29 | Siemens Ag | Flat terminal for connecting electrical lines |
US3260989A (en) * | 1964-08-27 | 1966-07-12 | Curtis Dev & Mfg Co | Captivated screw |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991017588A1 (en) * | 1990-05-02 | 1991-11-14 | Naimer, Hubert, Laurenz | Screw-on terminal |
FR2667989A1 (en) * | 1990-10-16 | 1992-04-17 | Telemecanique Sa | CONNECTING TERMINAL WITH IMPERSIBLE SCREW AND TERMINAL BOARD USING TERMINALS OF THIS KIND. |
EP0749179A1 (en) * | 1995-06-16 | 1996-12-18 | Naimer, Hubert Laurenz | Screw clamp |
Also Published As
Publication number | Publication date |
---|---|
JPH0426186B2 (en) | 1992-05-06 |
HK33488A (en) | 1988-05-13 |
EP0148056B1 (en) | 1987-09-09 |
DE3466140D1 (en) | 1987-10-15 |
FR2557739A1 (en) | 1985-07-05 |
BR8406720A (en) | 1985-10-22 |
US4611876A (en) | 1986-09-16 |
FR2557739B1 (en) | 1986-05-02 |
ATE29630T1 (en) | 1987-09-15 |
EP0148056A3 (en) | 1985-08-07 |
JPS60158567A (en) | 1985-08-19 |
CA1227843A (en) | 1987-10-06 |
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