EP1120603B1 - Gas burner with multiple flame rings - Google Patents

Gas burner with multiple flame rings Download PDF

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Publication number
EP1120603B1
EP1120603B1 EP01400042A EP01400042A EP1120603B1 EP 1120603 B1 EP1120603 B1 EP 1120603B1 EP 01400042 A EP01400042 A EP 01400042A EP 01400042 A EP01400042 A EP 01400042A EP 1120603 B1 EP1120603 B1 EP 1120603B1
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EP
European Patent Office
Prior art keywords
burner
gas
central
head
annular
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Expired - Lifetime
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EP01400042A
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German (de)
French (fr)
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EP1120603A2 (en
EP1120603A3 (en
Inventor
Bernard Dane
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Burner Systems International BSI SA
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Burner Systems International BSI SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • F23D14/065—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head with injector axis inclined to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

Definitions

  • the present invention relates to improvements brought to the sets formed by a plate of above a cooking appliance, especially for use household, and by a gas burner with multiple crowns of flames which is adapted to be mounted on said plate, according to the preamble of claim 1.
  • Such burners are used when high heating power is required and / or in conjunction with respective feeding devices in central and annular burners, when a modulation of the heating power, in location and in time, is required (Asian cuisine by example).
  • the document FR 2 650 369 relates to a gas burner with several concentric heads.
  • the layout of this known burner does not lead to optimal compactness that is required for a burner intended to equip a low cooktop thickness.
  • the object of the invention is therefore to propose a burner multiple flame crown gas of an improved type, whose structure is appropriate to confer a level modern security while still simple to manufacture with a number of component parts reduced to a minimum, and in addition with a relative vertical development reduced allowing its implementation as well on a conventional stove that on a plate of cooking.
  • this secondary air is made up partly by the ambient air surrounding the burners (crown of flames outer ring of the second burner, annular; crown of flames of the first burner, central), or partly by a fraction of the air penetrating into the annular space defined by the outer burner head and the plate of above, this fraction of air passing through aforementioned lights, between the two burners central and annular and feeding the flames of the crown inside the annular burner and, in part, the flames of the central burner.
  • the multi-crown burner is thus arranged of flame with structural provisions specific to provide an air supply, primary and secondary, leading to the prevention of a repercussion of the uses underlying parts of the cooking appliance on the flames, even at low speed, in other words to prevent a possible extinction of the flames, especially at low during a violent closing of the door of a underlying oven in particular.
  • the arrangement of the horizontal Venturi for feeding the external burner head and Venturi directed upwards and constituted, as indicated further, partly tubularly and partly radially horizontally, provides a burner of relatively low height suitable for mounting too well on a stove than on a hob.
  • the central well of the inner burner head is directed substantially vertically and the axis of the first injector is substantially vertical.
  • the central well of the burner head inside and the first injector that is substantially coaxial range of approximately 15 to 20 degrees to the vertical.
  • the gas burner has a single annular chamber in the outer burner head, which is lined bilaterally by passages of flames, and that the second burner, annular, has two crowns of flames, the burner being of the type with three crowns of flames.
  • the means of support of the external burner head are integral with said head external burner and are constituted in the form general of a skirt projecting below the below said head and a surrounding shoulder the central recess of the central region of said head burner.
  • the annular chamber of the external burner head can be closed, top, by a removable annular cover placed on the side walls of the room.
  • the first burner, central equipped with a Venturi of length sufficient, that the central well of the burner head interior has a decreasing section towards from the top, thus forming a first section of Venturi, tubular, and that the upper surface of the head of internal burner surrounding the upper hole of the well central defines, together with a lid removable, the overlying, a radial annular divergent forming a second section of Venturi, radial annular.
  • the burner has a thermocouple for detecting the presence of flames and / or electric ignition member and said thermocouple and / or ignition element are functionally associated with the central burner.
  • a burner arranged according to the invention presents, thanks to its structure, a great flexibility depending on the type of cooking appliance equip.
  • the outer burner head can, depending on the case, be provided with a single crown of flames arranged either internally or externally or be provided with two crowns of flames indoor and outdoor.
  • the burners central and external may, depending on the case, be connected to a common gas supply control, either be connected each to an individual order gas supply, which allows modulation flexible heating conditions in location and in the weather.
  • the gas burner of the invention comprises a burner head interior 1, which is in a central position, having a ring of peripheral flames (flames 2) and at least one outer burner head 3, which is annular and remotely surrounds the central burner head 1, possessing at least one ring of flames, inner and / or outside.
  • outer burner head, annular, 3 has two crowns of flame, one inner (flame passages 4) and the outer one (passages of flames 5).
  • the burner further comprises a burner body 6 partially visible in Figures 1 and 2 and shown separately in FIG. 3.
  • This burner body 6 presents here a relatively elongated shape, substantially in correspondence with the diameter of the burner head outside 3 which overcomes said body.
  • the burner body 6 is arranged to be fixed, by fixing means 7, under the top plate a cooking appliance, such as a stove, which top plate P is visible on the sectional drawings Figures 5, 6 and 7.
  • a first gas inlet 8 connectable to a gas supply via control means (no shown) which are preferably his own.
  • the gas supply 8 is in communication with a gas injector 9 located coaxially facing one end of a conduit 10 first converge, then diverge and form Venturi tubular, which extends substantially over the largest part of the length of the burner body 6, i.e. the diameter of the outer burner head 3. Between the gas injector 9 and the duct 10 is a light 11 primary air intake. At its end terminal, the conduit 10 is in connection with a well substantially vertical 12 bringing the air-gas mixture into annular outer burner head 3.
  • the burner body has a second gas inlet 13 distinct from the first arrival 8 above, and arranged, here on the side of the body 6.
  • the gas inlet 13 is connectable to a gas supply via means of control (not shown) which preferably are his own and are distinct from the power control means of the first gas supply 8.
  • the gas inlet 13 is in communication with a gas injector 14 which is directed upwards: at the 6, the axis of the injector 14 is substantially vertical and substantially coaxial with the burner heads inside 1 and outside 3.
  • the body of burner 5 supports necessary accessories to safe operation of the burner, and in particular at least a thermocouple Th and at least one ignition member electric Al.
  • the outer burner head 3 rests, through a cutout 30 made in the top plate P, on the burner body 6 via means of support.
  • the burner body 6 has a support flange 16 globally circular centrally located and coaxially to the vertical injector 14.
  • This flange 16 forms with the central bottom of the burner body 6 a kind of tank, having the injector 14 in its center and the means of support of the external burner head arranged laterally.
  • the means of support are secured to the underside of the burner head 3 and are constituted in the form of a skirt 17 protruding downward by forming an outwardly peripheral shoulder 18 bearing on the top of the collar 16 above.
  • This skirt 17 is made either of continuous way with lights, so discontinuous (as illustrated in Figure 6) in order to constitute passages 20 for primary air like this will appear later.
  • the lower edge of the skirt 17 is shaped to cooperate with projections 19 provided in the bottom of the tank, so as to block in rotating the outer burner head 3 on the body of burner 6 and to serve simultaneously to position them mutually angularly correct.
  • the outer burner head 3 has a annular chamber 22 located in the vicinity of the periphery external of this head.
  • the chamber 22 is formed by a channel defined by a bottom 23 and two side walls concentric 24, 25 and by a lid or hat ring 26 capping said channel.
  • 24, 25 are formed notches forming passages of flames.
  • both walls 24, 25 are provided with respective notches 4, 5, so that the outer burner head has a double crown of flames.
  • the bottom 23 has an opening 27 opposite the well substantially vertical 11 above.
  • annular cap 26 is guided, when it is put in place, and retained in position by positioning fingers 28 secured to the outer burner head 3.
  • the head of external burner 3 is arranged so that between a central region which will be discussed later and the annular chamber 22, it has lights 29 which open this intermediate annular zone, for the purpose to allow a circulation of air as it will appear further.
  • the central region 31 of the burner head outside 3 has a substantially vertical recess 32, coaxial with the axis of the injector 14.
  • the central burner head 1 is supported peripherally on an annular shoulder 33 practiced in the outer burner head 3. Its central region, protruding downwards, is engaged in the recess 32 mentioned above of the external burner head and presents a central well 34 coaxial with the axis of the injector 14.
  • the well 34 has a decreasing section upwards and forms a converge.
  • the peripheral wall 35 of the burner head central 1 is pierced with indentations 2 forming passages of flames.
  • a cap or cover 36 rests on the wall 35.
  • the facing faces of the cover 36 and the central region of the central burner head 1 which surrounds the hole in well 34 deviate substantially from one another radially outward, forming a divergent annular radial 37.
  • the whole converge tubular 34 and the radial annular divergent 37 constitutes a Venturi.
  • Figure 7 is shown a variant of embodiment of the arrangement shown in FIG. which the central well 34 and the injector 14, coaxial, are no longer vertical but inclined at an angle of 15 to 20 ° from the vertical.
  • This arrangement is preferred vertical axis assembly of Figure 6, due to the elongation provided for well 34: although low, this elongation is sufficient to improve the performance of the burner central 1.
  • the external burner head 3 is, as is often the case for burners with gas, bottom lined by an annular skirt device 38 inclined downward.
  • This skirt can be integral part of the burner head 3 as visible particularly in Figures 5, 6 and 7, or may be a annular piece 39 removably attached to the head of burner 3: this annular piece 39 can be set place with appropriate shoulders as shown, in partial sectional representation, in FIG.
  • thermocouple Th and / or a single electrical ignition member Al which are then associated operation only burner central.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

A gas burner with multiple gas rings comprising: a burner body (6) mountable underneath a top plate, with a cut-out section, of an appliance and incorporating a first, upwardly directed gas injector (14) and a second gas injector (9) followed by a horizontal tubular Venturi (10) opening into a vertical well (12); an outer burner head (3) seated on the body (6) through the cut-out section and spaced at a distance above the plate and provided with an annular chamber (22) open above the well (12) and having one or two rows of orifices for flames (4,5); and an inner burner head (1) shaped so as to have a radial divergent (37) coaxially supplied by the first injector through a recess located at the center (31) of the head (3), ports being provided in the head (3) so that all the primary air and the secondary air needed to operate the multiple burner arrives from the top of the top plate of the appliance.

Description

La présente invention concerne des perfectionnements apportés aux ensembles formés par une plaque de dessus d'un appareil de cuisson, notamment à usage ménager, et par un brûleur à gaz à multiples couronnes de flammes qui est propre à être monté sur ladite plaque, selon le préambule de la revendication 1.The present invention relates to improvements brought to the sets formed by a plate of above a cooking appliance, especially for use household, and by a gas burner with multiple crowns of flames which is adapted to be mounted on said plate, according to the preamble of claim 1.

De tels brûleurs sont utilisés lorsqu'une puissance de chauffe importante est requise et/ou, en conjonction avec des dispositifs respectifs d'alimentation en gaz des brûleurs central et annulaire, lorsqu'une modulation de la puissance de chauffe, en emplacement et dans le temps, est requise (cuisine asiatique par exemple).Such burners are used when high heating power is required and / or in conjunction with respective feeding devices in central and annular burners, when a modulation of the heating power, in location and in time, is required (Asian cuisine by example).

On connaít déjà notamment des brûleurs à multiples couronnes de flammes pourvus d'un brûleur central à une couronne de flammes et d'un brûleur annulaire pourvu d'une couronne de flammes extérieure ou de deux couronnes de flammes, respectivement intérieure et extérieure.We already know in particular multiple burners flame crowns with a central burner at one ring of flames and an annular burner provided with a outer flame crown or two crowns of flames, respectively inner and outer.

Toutefois ces brûleurs conservent des structures inappropriées pour procurer les sécurités recherchées actuellement, notamment en prévention contre une extinction des flammes, et également pour ce qui concerne la compacité, notamment verticale.However, these burners retain structures inappropriate to provide the desired security currently, in particular in prevention against extinguishing the flames, and also with regard to compactness, especially vertical.

Le document FR 2 650 369 concerne un brûleur à gaz à plusieurs têtes concentriques. Toutefois, l'agencement de ce brûleur connu (injecteurs verticaux, venturis définis par des pièces verticales, etc.) ne conduit pas à une compacité optimale qui est requise pour un brûleur destiné à équiper une table de cuisson de faible épaisseur. The document FR 2 650 369 relates to a gas burner with several concentric heads. However, the layout of this known burner (vertical injectors, venturis defined by vertical parts, etc.) does not lead to optimal compactness that is required for a burner intended to equip a low cooktop thickness.

L'invention a donc pour but de proposer un brûleur à gaz à multiples couronnes de flammes d'un type amélioré, dont la structure soit propre à conférer un niveau de sécurité moderne tout en restant de fabrication simple avec un nombre de pièces composantes réduit à un minimum, et au surplus avec un développement vertical relativement réduit autorisant sa mise en place aussi bien sur une cuisinière conventionnelle que sur une plaque de cuisson.The object of the invention is therefore to propose a burner multiple flame crown gas of an improved type, whose structure is appropriate to confer a level modern security while still simple to manufacture with a number of component parts reduced to a minimum, and in addition with a relative vertical development reduced allowing its implementation as well on a conventional stove that on a plate of cooking.

A ces fins, un brûleur tel que mentionné au préambule, étant agencé conformément à l'invention, se caractérise par les dispositions de la partie caractérisante de la revendication 1. For these purposes, a burner as mentioned in preamble, being arranged in accordance with the invention, characterized by the provisions of the characterized in claim 1.

Grâce à la structure adoptée, on constitue un brûleur à multiples couronnes de flammes dans lequel la totalité de l'air primaire nécessaire au fonctionnement du premier brûleur, central, et du second brûleur, annulaire, est amenée respectivement au voisinage des premier et second injecteurs de gaz par des trajets situés exclusivement au-dessus de la plaque de dessus de l'appareil de cuisson ; à cet effet, l'air primaire pénètre dans l'espace annulaire défini entre la tête de brûleur extérieur et la plaque de dessus, traverse les évidements latéraux des moyens de support de la tête de brûleur extérieur et pénètre dans le corps de brûleur où il est mélangé avec le jet de gaz sortant du premier injecteur alimentant le brûleur central, tandis que par ailleurs il passe dudit espace annulaire précité directement, par une ouverture latérale prévue à cet effet, vers l'entrée du conduit convergent-divergent horizontal où il est mélangé au jet de gaz sortant du second injecteur pour l'alimentation du brûleur extérieur.Thanks to the structure adopted, we constitute a burner with multiple crowns of flames in which the all the primary air required for the operation of the first burner, central, and second burner, annular, is brought respectively to the vicinity of the first and second gas injectors by paths located exclusively above the top plate of the camera cooking; for this purpose, the primary air enters the annular space defined between the burner head outside and the top plate, through the recesses lateral support means of the burner head outside and enters the burner body where it is mixed with the gas jet coming out of the first injector feeding the central burner, while otherwise it passes from said annular space directly above, by a lateral opening provided for this purpose, towards the entrance to Convergent-divergent horizontal duct where it is mixed with the gas jet coming out of the second injector for the external burner feed.

De même, la totalité de l'air secondaire qui vient alimenter les flammes arrive par le dessus de la plaque de dessus ; cet air secondaire est constitué pour partie par l'air ambiant entourant les brûleurs (couronne de flammes extérieure du second brûleur, annulaire ; couronne de flammes du premier brûleur, central), soit pour partie par une fraction de l'air pénétrant dans l'espace annulaire défini par la tête de brûleur extérieur et la plaque de dessus, cette fraction d'air passant, à travers les lumières précitées, entre les deux brûleurs central et annulaire et alimentant les flammes de la couronne intérieure du brûleur annulaire et, pour partie, les flammes du brûleur central.Likewise, all of the secondary air that comes feed the flames comes from the top of the plate above ; this secondary air is made up partly by the ambient air surrounding the burners (crown of flames outer ring of the second burner, annular; crown of flames of the first burner, central), or partly by a fraction of the air penetrating into the annular space defined by the outer burner head and the plate of above, this fraction of air passing through aforementioned lights, between the two burners central and annular and feeding the flames of the crown inside the annular burner and, in part, the flames of the central burner.

On agence ainsi le brûleur à multiples couronnes de flammes avec des dispositions structurelles propres à procurer une alimentation en air, primaire et secondaire, conduisant à empêcher une répercussion des utilisations des parties sous-jacentes de l'appareil de cuisson sur les flammes, même à petit régime, autrement dit à empêcher une éventuelle extinction des flammes, notamment à faible régime, lors d'une fermeture violente de la porte d'un four sous-jacent notamment.The multi-crown burner is thus arranged of flame with structural provisions specific to provide an air supply, primary and secondary, leading to the prevention of a repercussion of the uses underlying parts of the cooking appliance on the flames, even at low speed, in other words to prevent a possible extinction of the flames, especially at low during a violent closing of the door of a underlying oven in particular.

En outre, l'agencement du Venturi horizontal pour l'alimentation de la tête de brûleur extérieur et du Venturi dirigé vers le haut et constitué, comme indiqué plus loin, pour partie tubulairement et pour partie radialement horizontalement, permet d'obtenir un brûleur de hauteur relativement faible propre à être monté aussi bien sur une cuisinière que sur une plaque de cuisson.In addition, the arrangement of the horizontal Venturi for feeding the external burner head and Venturi directed upwards and constituted, as indicated further, partly tubularly and partly radially horizontally, provides a burner of relatively low height suitable for mounting too well on a stove than on a hob.

Dans un premier mode de réalisation possible, qui présente l'avantage de la simplicité, le puits central de la tête de brûleur intérieur est dirigé sensiblement verticalement et l'axe du premier injecteur est sensiblement vertical.In a first possible embodiment, which has the advantage of simplicity, the central well of the inner burner head is directed substantially vertically and the axis of the first injector is substantially vertical.

Toutefois, dans un autre mode de réalisation, intéressant car il conduit à un sensible allongement du Venturi et donc à une meilleure efficacité du mélange air-gaz, on prévoit que le puits central de la tête de brûleur intérieur et le premier injecteur qui lui est sensiblement coaxial soient inclinés d'environ 15 à 20° par rapport à la verticale.However, in another embodiment, interesting because it leads to a significant lengthening of the Venturi and therefore to a better efficiency of the air-gas mixture, it is expected that the central well of the burner head inside and the first injector that is substantially coaxial range of approximately 15 to 20 degrees to the vertical.

Dans un exemple de réalisation d'emploi courant dans les appareils de cuisson ménagers, il est prévu que le brûleur à gaz comporte une seule chambre annulaire dans la tête de brûleur extérieur, qui est bordée bilatéralement par des passages de flammes, et que le second brûleur, annulaire, possède deux couronnes de flammes, le brûleur étant du type à trois couronnes de flammes.In an example of a job creation in household cooking appliances, it is expected that the gas burner has a single annular chamber in the outer burner head, which is lined bilaterally by passages of flames, and that the second burner, annular, has two crowns of flames, the burner being of the type with three crowns of flames.

Dans une réalisation structurellement simple qui permet de constituer un nombre réduit de pièces propres à être fabriquées en fonderie, les moyens de support de la tête de brûleur extérieur sont solidaires de ladite tête de brûleur extérieur et sont constitués sous la forme générale d'une jupe saillant inférieurement sous le dessous de ladite tête et d'un épaulement entourant l'évidement central de la région centrale de ladite tête de brûleur. Avec le même souci, la chambre annulaire de la tête de brûleur extérieur peut être fermée, supérieurement, par un couvercle annulaire amovible posé sur les parois latérales de la chambre. In a structurally simple realization that allows the creation of a small number of be made in a foundry, the means of support of the external burner head are integral with said head external burner and are constituted in the form general of a skirt projecting below the below said head and a surrounding shoulder the central recess of the central region of said head burner. With the same concern, the annular chamber of the external burner head can be closed, top, by a removable annular cover placed on the side walls of the room.

De même, il est intéressant, pour que le premier brûleur, central, soit muni d'un Venturi de longueur suffisante, que le puits central de la tête de brûleur intérieur présente une section décroissante en direction du haut, formant ainsi un premier tronçon de Venturi, tubulaire, et que la surface supérieure de la tête de brûleur intérieur entourant l'orifice supérieur du puits central définisse, conjointement avec un couvercle amovible la surmontant, un divergent annulaire radial formant un second tronçon de Venturi, annulaire radial.Similarly, it is interesting, so that the first burner, central, equipped with a Venturi of length sufficient, that the central well of the burner head interior has a decreasing section towards from the top, thus forming a first section of Venturi, tubular, and that the upper surface of the head of internal burner surrounding the upper hole of the well central defines, together with a lid removable, the overlying, a radial annular divergent forming a second section of Venturi, radial annular.

Dans un mode de réalisation intéressant en ce qu'il permet une adaptation aisée du brûleur aux exigences commerciales de vente des appareils de cuisson, on peut faire en sorte que la tête de brûleur extérieur soit entourée inférieurement d'une jupe périphérique inclinée vers le bas et que ladite jupe périphérique soit constituée sous forme d'une pièce amovible.In an interesting embodiment in this it allows an easy adaptation of the burner to the requirements commercial sales of cooking appliances, it is possible to make sure that the external burner head is surrounded below by an inclined peripheral skirt down and that said peripheral skirt is formed as a removable piece.

De plus, afin de ne pas multiplier les accessoires nécessaires au fonctionnement du brûleur et de réduire ainsi le coût global du brûleur, le brûleur comporte un thermocouple de détection de présence de flammes et/ou un organe d'allumage électrique et ledit thermocouple et/ou organe d'allumage sont fonctionnellement associés au brûleur central.Moreover, in order not to multiply the accessories necessary for burner operation and to reduce so the overall cost of the burner, the burner has a thermocouple for detecting the presence of flames and / or electric ignition member and said thermocouple and / or ignition element are functionally associated with the central burner.

Un brûleur agencé conformément à l'invention présente, grâce à sa structure, une grande souplesse d'implantation selon le type d'appareil de cuisson à équiper. D'une part, la tête de brûleur extérieur peut, selon les cas, être pourvue d'une seule couronne de flammes disposée soit intérieurement, soit extérieurement ou bien être pourvue de deux couronnes de flammes intérieure et extérieure. D'autre part, les brûleurs central et extérieur peuvent, selon les cas, soit être raccordés à une commande commune d'alimentation en gaz, soit être raccordés chacun à une commande individuelle d'alimentation en gaz, ce qui autorise une modulation souple des conditions de chauffage en emplacement et dans le temps.A burner arranged according to the invention presents, thanks to its structure, a great flexibility depending on the type of cooking appliance equip. On the one hand, the outer burner head can, depending on the case, be provided with a single crown of flames arranged either internally or externally or be provided with two crowns of flames indoor and outdoor. On the other hand, the burners central and external may, depending on the case, be connected to a common gas supply control, either be connected each to an individual order gas supply, which allows modulation flexible heating conditions in location and in the weather.

L'invention sera mieux comprise à la lecture de la description détaillée qui suit de certains modes de réalisation donnés uniquement à titre d'exemples nullement limitatifs. Dans cette description, on se réfère aux dessins annexés sur lesquels :

  • la figure 1 est une vue d'ensemble, en perspective, d'un brûleur à triple couronne de flammes agencé conformément à l'invention ;
  • la figure 2 est une vue en perspective analogue à celle de la figure 1 et montrant le même brûleur dans lequel les deux chapeaux ont été enlevés ;
       la figure 3 est une vue de dessus du brûleur montré à la figure 2 avec les deux chapeaux enlevés ;
  • la figure 4 est une vue en perspective du seul corps de brûleur ;
  • la figure 5 est une vue schématique du brûleur de la figure 1, en coupe selon la ligne V-V ;
  • les figures 6 et 7 sont des vues schématiques de deux variantes de réalisation, respectivement, du brûleur de la figure 1, en coupe selon la ligne VI-VI ; et
  • la figure 8 est une vue schématique partielle, en coupe, illustrant une variante de réalisation d'une partie du brûleur conforme à l'invention.
The invention will be better understood on reading the following detailed description of certain embodiments given solely by way of non-limiting examples. In this description, reference is made to the accompanying drawings in which:
  • Figure 1 is an overall view, in perspective, of a burner triple flame crown arranged in accordance with the invention;
  • Figure 2 is a perspective view similar to that of Figure 1 and showing the same burner in which the two caps were removed;
    Figure 3 is a top view of the burner shown in Figure 2 with the two caps removed;
  • Figure 4 is a perspective view of the single burner body;
  • Figure 5 is a schematic view of the burner of Figure 1, in section along the line VV;
  • Figures 6 and 7 are schematic views of two embodiments, respectively, of the burner of Figure 1, in section along the line VI-VI; and
  • Figure 8 is a partial schematic sectional view illustrating an alternative embodiment of a portion of the burner according to the invention.

En se reportant tout d'abord à la figure 1, le brûleur à gaz de l'invention comporte une tête de brûleur intérieur 1, qui est en position centrale, possédant une couronne de flammes périphérique (passages de flammes 2) et au moins une tête de brûleur extérieur 3, qui est annulaire et entoure à distance la tête de brûleur central 1, possédant au moins une couronne de flammes, intérieure et/ou extérieure. Dans l'exemple illustré dans l'ensemble des figures, la tête de brûleur extérieur, annulaire, 3 possède deux couronnes de flammes, l'une intérieure (passages de flammes 4) et l'autre extérieure (passages de flammes 5).Referring first to Figure 1, the gas burner of the invention comprises a burner head interior 1, which is in a central position, having a ring of peripheral flames (flames 2) and at least one outer burner head 3, which is annular and remotely surrounds the central burner head 1, possessing at least one ring of flames, inner and / or outside. In the example shown in the set Figures, outer burner head, annular, 3 has two crowns of flame, one inner (flame passages 4) and the outer one (passages of flames 5).

Le brûleur comporte en outre un corps de brûleur 6 visible partiellement aux figures 1 et 2 et montré isolément à la figure 3. Ce corps de brûleur 6 présente ici une forme relativement allongée, sensiblement en correspondance avec le diamètre de la tête de brûleur extérieur 3 qui surmonte ledit corps.The burner further comprises a burner body 6 partially visible in Figures 1 and 2 and shown separately in FIG. 3. This burner body 6 presents here a relatively elongated shape, substantially in correspondence with the diameter of the burner head outside 3 which overcomes said body.

Le corps de brûleur 6 est agencé pour être fixé, par des moyens de fixation 7, sous la plaque de dessus d'un appareil de cuisson, tel qu'une cuisinière, laquelle plaque de dessus P est visible sur les dessins en coupe des figures 5, 6 et 7.The burner body 6 is arranged to be fixed, by fixing means 7, under the top plate a cooking appliance, such as a stove, which top plate P is visible on the sectional drawings Figures 5, 6 and 7.

A une extrémité du corps de brûleur 6 se trouve une première arrivée de gaz 8, raccordable à une alimentation en gaz via des moyens de contrôle (non montrés) qui de préférence lui sont propres.At one end of the burner body 6 is a first gas inlet 8, connectable to a gas supply via control means (no shown) which are preferably his own.

Comme on le voit à la figure 5, l'arrivée de gaz 8 est en communication avec un injecteur de gaz 9 situé coaxialement en regard d'une extrémité d'un conduit 10 d'abord convergent, puis divergent et formant Venturi tubulaire, qui s'étend sensiblement sur la plus grande partie de la longueur du corps de brûleur 6, c'est-à-dire du diamètre de la tête de brûleur extérieur 3. Entre l'injecteur de gaz 9 et le conduit 10 se trouve une lumière 11 d'admission d'air primaire. A son extrémité terminale, le conduit 10 est en liaison avec un puits sensiblement vertical 12 amenant le mélange air-gaz dans la tête de brûleur extérieur annulaire 3.As can be seen in Figure 5, the gas supply 8 is in communication with a gas injector 9 located coaxially facing one end of a conduit 10 first converge, then diverge and form Venturi tubular, which extends substantially over the largest part of the length of the burner body 6, i.e. the diameter of the outer burner head 3. Between the gas injector 9 and the duct 10 is a light 11 primary air intake. At its end terminal, the conduit 10 is in connection with a well substantially vertical 12 bringing the air-gas mixture into annular outer burner head 3.

Comme visible plus facilement aux figures 4 et 6, le corps de brûleur comporte une seconde arrivée de gaz 13 distincte de la première arrivée 8 précitée, et disposée, ici, sur le côté du corps 6. L'arrivée de gaz 13 est raccordable à une alimentation en gaz via des moyens de contrôle (non montrés) qui de préférence lui sont propres et sont distincts des moyens de contrôle d'alimentation de la première arrivée de gaz 8.As seen more easily in Figures 4 and 6, the burner body has a second gas inlet 13 distinct from the first arrival 8 above, and arranged, here on the side of the body 6. The gas inlet 13 is connectable to a gas supply via means of control (not shown) which preferably are his own and are distinct from the power control means of the first gas supply 8.

L'arrivée de gaz 13 est en communication avec un injecteur de gaz 14 qui est dirigé vers le haut : à la figure 6, l'axe de l'injecteur 14 est sensiblement vertical et sensiblement coaxial aux têtes de brûleur intérieur 1 et extérieur 3.The gas inlet 13 is in communication with a gas injector 14 which is directed upwards: at the 6, the axis of the injector 14 is substantially vertical and substantially coaxial with the burner heads inside 1 and outside 3.

Comme on le voit mieux à la figure 4, le corps de brûleur 5 supporte des accessoires nécessaires au fonctionnement sécurisé du brûleur, et notamment au moins un thermocouple Th et au moins un organe d'allumage électrique Aℓ.As best seen in Figure 4, the body of burner 5 supports necessary accessories to safe operation of the burner, and in particular at least a thermocouple Th and at least one ignition member electric Aℓ.

La tête de brûleur extérieur 3 repose, à travers une découpe 30 pratiquée dans la plaque de dessus P, sur le corps de brûleur 6 par l'intermédiaire de moyens de support. A cet effet, on peut prévoir, comme on le voit mieux aux figures 4 et 6, que le corps de brûleur 6 présente une collerette de support 16 globalement circulaire située centralement et coaxialement à l'injecteur vertical 14. Cette collerette 16 forme avec le fond central du corps de brûleur 6 une sorte de cuve, ayant l'injecteur 14 en son centre et les moyens de support de la tête de brûleur extérieur disposés latéralement. Dans l'exemple illustré, les moyens de support sont solidaires du dessous de la tête de brûleur extérieur 3 et sont constitués sous forme d'une jupe 17 saillant vers le bas en formant extérieurement un épaulement périphérique 18 prenant appui sur le haut de la collerette 16 précitée. Cette jupe 17 est réalisée soit de façon continue avec des lumières, soit de façon discontinue (cas illustré à la figure 6) afin de constituer des passages 20 pour l'air primaire comme cela apparaítra plus loin.The outer burner head 3 rests, through a cutout 30 made in the top plate P, on the burner body 6 via means of support. For this purpose, we can predict, as we see better in FIGS. 4 and 6, that the burner body 6 has a support flange 16 globally circular centrally located and coaxially to the vertical injector 14. This flange 16 forms with the central bottom of the burner body 6 a kind of tank, having the injector 14 in its center and the means of support of the external burner head arranged laterally. In the example illustrated, the means of support are secured to the underside of the burner head 3 and are constituted in the form of a skirt 17 protruding downward by forming an outwardly peripheral shoulder 18 bearing on the top of the collar 16 above. This skirt 17 is made either of continuous way with lights, so discontinuous (as illustrated in Figure 6) in order to constitute passages 20 for primary air like this will appear later.

On notera en outre que le bord inférieur de la jupe 17 est conformé pour coopérer avec des saillies 19 prévues dans le fond de la cuve, de façon à bloquer en rotation la tête de brûleur extérieur 3 sur le corps de brûleur 6 et à servir simultanément à les positionner mutuellement angulairement de façon correcte.Note further that the lower edge of the skirt 17 is shaped to cooperate with projections 19 provided in the bottom of the tank, so as to block in rotating the outer burner head 3 on the body of burner 6 and to serve simultaneously to position them mutually angularly correct.

Comme cela se voit mieux aux figures 4 et 5, la partie de la tête de brûleur extérieur 3 qui entoure la région centrale munie de la jupe saillante 17 surplombe la plaque de dessus P en étant maintenue à distance au-dessus de celle-ci, de sorte que la plaque de dessus P et la face inférieure de la tête de brûleur 3 définissent entre elles un espace annulaire 21, de forme irrégulière eu égard à la conformation générale du brûleur. Les passages 20 précités communiquent avec cet espace 21.As can be seen in Figures 4 and 5, the part of the outer burner head 3 surrounding the central region provided with the projecting skirt 17 overlooks the top plate P being held at a distance above of it, so that the top plate P and the face bottom of the burner head 3 define between them an annular space 21, of irregular shape with respect to the general conformation of the burner. The passages 20 above communicate with this space 21.

La tête de brûleur extérieur 3 comporte une chambre annulaire 22 située au voisinage de la périphérie externe de cette tête. La chambre 22 est formée par un canal défini par un fond 23 et deux parois latérales concentriques 24, 25 et par un couvercle ou chapeau annulaire 26 coiffant ledit canal. Dans au moins une des parois 24, 25 sont pratiquées des encoches formant des passages de flammes. Dans l'exemple illustré, les deux parois 24, 25 sont munies d'encoches respectives 4, 5, de sorte que la tête de brûleur extérieur comporte une double couronne de flammes.The outer burner head 3 has a annular chamber 22 located in the vicinity of the periphery external of this head. The chamber 22 is formed by a channel defined by a bottom 23 and two side walls concentric 24, 25 and by a lid or hat ring 26 capping said channel. In at least one of 24, 25 are formed notches forming passages of flames. In the example shown, both walls 24, 25 are provided with respective notches 4, 5, so that the outer burner head has a double crown of flames.

L'ensemble de cet agencement est également bien visible aux figures 2 et 3.The whole of this arrangement is also well visible in Figures 2 and 3.

Comme visible aux figures 2 et 6, le fond 23 présente une ouverture 27 en regard du puits sensiblement vertical 11 précité.As shown in FIGS. 2 and 6, the bottom 23 has an opening 27 opposite the well substantially vertical 11 above.

Comme visible aux figures 1, 2 et 6 notamment, le chapeau annulaire 26 est guidé, lors de sa mise en place, et retenu en position par des doigts de positionnement 28 solidaires de la tête de brûleur extérieur 3.As can be seen in FIGS. 1, 2 and 6 in particular, the annular cap 26 is guided, when it is put in place, and retained in position by positioning fingers 28 secured to the outer burner head 3.

Comme visible aux figures 3 et 5, la tête de brûleur extérieur 3 est agencée de sorte qu'entre une région centrale dont il sera question plus loin et la chambre annulaire 22, elle comporte des lumières 29 qui ajourent cette zone annulaire intermédiaire, dans le but de permettre une circulation d'air comme cela apparaítra plus loin.As shown in Figures 3 and 5, the head of external burner 3 is arranged so that between a central region which will be discussed later and the annular chamber 22, it has lights 29 which open this intermediate annular zone, for the purpose to allow a circulation of air as it will appear further.

Enfin, la région centrale 31 de la tête de brûleur extérieur 3 présente un évidement sensiblement vertical 32, coaxial à l'axe de l'injecteur 14.Finally, the central region 31 of the burner head outside 3 has a substantially vertical recess 32, coaxial with the axis of the injector 14.

La tête de brûleur central 1 prend appui périphériquement sur un épaulement annulaire 33 pratiqué dans la tête de brûleur extérieur 3. Sa région centrale, saillant vers le bas, est engagée dans l'évidement 32 précité de la tête de brûleur extérieur et présente un puits central 34 coaxial à l'axe de l'injecteur 14. Le puits 34 a une section décroissante vers le haut et forme un convergent.The central burner head 1 is supported peripherally on an annular shoulder 33 practiced in the outer burner head 3. Its central region, protruding downwards, is engaged in the recess 32 mentioned above of the external burner head and presents a central well 34 coaxial with the axis of the injector 14. The well 34 has a decreasing section upwards and forms a converge.

La paroi périphérique 35 de la tête de brûleur central 1 est percée d'échancrures 2 formant des passages de flammes. Un chapeau ou couvercle 36 repose sur la paroi 35. The peripheral wall 35 of the burner head central 1 is pierced with indentations 2 forming passages of flames. A cap or cover 36 rests on the wall 35.

Les faces en regard du couvercle 36 et de la région centrale de la tête de brûleur central 1 qui entoure l'orifice du puits 34 s'écartent sensiblement l'une de l'autre radialement vers l'extérieur, formant un divergent annulaire radial 37. L'ensemble du convergent tubulaire 34 et du divergent annulaire radial 37 constitue un Venturi.The facing faces of the cover 36 and the central region of the central burner head 1 which surrounds the hole in well 34 deviate substantially from one another radially outward, forming a divergent annular radial 37. The whole converge tubular 34 and the radial annular divergent 37 constitutes a Venturi.

A la figure 7 est représentée une variante de réalisation de l'agencement illustré à la figure 6 et dans laquelle le puits central 34 et l'injecteur 14, coaxiaux, ne sont plus verticaux, mais inclinés d'un angle de 15 à 20° par rapport à la verticale. Cet agencement est préféré au montage d'axe vertical de la figure 6, en raison de l'allongement procuré pour le puits 34 : bien que faible, cet allongement suffit à améliorer le rendement du brûleur central 1.In Figure 7 is shown a variant of embodiment of the arrangement shown in FIG. which the central well 34 and the injector 14, coaxial, are no longer vertical but inclined at an angle of 15 to 20 ° from the vertical. This arrangement is preferred vertical axis assembly of Figure 6, due to the elongation provided for well 34: although low, this elongation is sufficient to improve the performance of the burner central 1.

Enfin, on notera que la tête de brûleur extérieur 3 est, comme cela est souvent le cas pour les brûleurs à gaz, bordée inférieurement par une jupe annulaire périphérique 38 inclinée vers le bas. Cette jupe peut être partie intégrante de la tête de brûleur 3 comme visible notamment aux figures 5, 6 et 7, ou bien peut être une pièce annulaire 39 rapportée de façon amovible sur la tête de brûleur 3 : cette pièce annulaire 39 peut être mise en place grâce à des épaulements appropriés comme illustré, en représentation partielle en coupe, à la figure 8. En outre, il devient alors aisé de conformer et/ou de décorer cette pièce annulaire de façon diverse afin de satisfaire par exemple les exigences commerciales.Finally, note that the external burner head 3 is, as is often the case for burners with gas, bottom lined by an annular skirt device 38 inclined downward. This skirt can be integral part of the burner head 3 as visible particularly in Figures 5, 6 and 7, or may be a annular piece 39 removably attached to the head of burner 3: this annular piece 39 can be set place with appropriate shoulders as shown, in partial sectional representation, in FIG. In addition, it becomes easy to conform and / or decorate this annular piece of diverse way to satisfy for example, business requirements.

Les dispositions structurelles qui viennent d'être décrites conduisent à un brûleur à gaz à multiples couronnes de flammes dans lequel la totalité de l'air, primaire et secondaire, nécessaire à son fonctionnement lui est fournie par le dessus de la plaque de dessus P, ce qui évite les inconvénients (possibilité de soufflage de flammes) inhérents à une alimentation partielle ou totale de l'air primaire par le dessous de la plaque P.The structural arrangements that have just been described lead to a multiple gas burner wreaths of flames in which all of the air, primary and secondary, necessary for its operation it is provided by the top of the top plate P, this which avoids the disadvantages (possibility of blowing flames) inherent to partial or total primary air from below the P-plate.

Sur les figures en coupe 5, 6 et 7, on a schématisé par les flèches pleines F le trajet suivi par l'air primaire qui, depuis l'espace annulaire 21, parvient à l'entrée du conduit 10 (figure 5) et simultanément, traversant les ouvertures 20, parvient au niveau de l'injecteur 14 (figures 6 et 7).In the figures in section 5, 6 and 7, there is shown schematized by the full arrows F the path followed by the primary air which, since the annular space 21, reaches at the entrance of the duct 10 (FIG. 5) and simultaneously, through the openings 20, reaches the level of the injector 14 (Figures 6 and 7).

Quant à l'air secondaire qui doit parvenir aux pieds des flammes, ses trajets sont schématisés par les flèches en tirets f. Il provient pour partie de l'extérieur du brûleur (flèches f1) pour la couronne de flammes externes, et d'une fraction de l'air en provenance de l'espace annulaire 21 et remontant à travers les lumières 29 (flèches f2) et d'air extérieur arrivant par le dessus (flèches f3) pour les deux couronnes de flammes intérieures en vis-à-vis.As for the secondary air that must reach the feet of the flames, its paths are shown schematically by the arrows in dashes f. It comes partly from the outside of the burner (arrows f 1 ) for the ring of external flames, and a fraction of the air coming from the annular space 21 and going up through the lights 29 (arrows f 2 ) and outside air coming from above (arrows f 3 ) for the two rings of internal flames vis-à-vis.

On notera enfin que, pour simplifier la structure du brûleur et réduire son coût, on prévoit un seul thermocouple Th et/ou un seul organe d'allumage électrique Aℓ qui sont alors associés fonctionnement au seul brûleur central.Finally, note that to simplify the structure of the burner and reduce its cost, only one thermocouple Th and / or a single electrical ignition member Aℓ which are then associated operation only burner central.

Claims (9)

  1. An assembly constituted with a top plate (P) of a cooking appliance, in particular for domestic use, and with a gas burner with multiple gas rings designed to be mounted on said top plate, which burner comprises a first, central burner having a ring for peripheral flames and at least a second, annular burner surrounding the central burner at a distance therefrom, having a least one flame ring, said burner comprising:
    a burner body (6) designed to be fixed to the top plate (P), on the bottom thereof, and comprising:
    a first gas inlet (13) and, communicating therewith, a first gas injector (14), the axis of which is upwardly directed,
    a second gas inlet (8) and, communicating therewith, a second gas injector (9) disposed facing a convergent-divergent pipe (10) forming a Venturi;
    an outer burner head (3) supported, by support means (17, 18) inserted in a cut-out section (30) of said top plate (P), by said burner body, said burner head (3) comprising:
    a chamber (22) provided with passages for flames (4; 5) at least around one side and having an opening (27) in its base (23),
    a central region (31) having a central, vertical recess (32), and
    ports (29) disposed between said chamber (22) and said central region (31),
    said support means (17, 18) for the outer burner head (3) being designed so that said burner head (3) is disposed above and at a distance from the top plate (P), forming in conjunction therewith an annular space (21) surrounding said central region, said support means (17, 18) having lateral recesses (29) providing a communication between said central recess (32) of the central region and said annular space (21);
    an inner burner head (1) designed to be centrally supported by said outer burner head (3) facing said central recess (32) of the central region (31), said inner burner head (1) having a central well (34) coaxially aligned with the axis of said first gas injector (14),
    characterized in that the second gas injector (9) has a substantially horizontal axis and the convergent-divergent pipe (10) forming a Venturi extends across at least the greater part of the transverse extension of the burner body (6), said pipe (10) communicating, at its end opposite the second injector (9), with a substantially vertical well (12) open at the top, and in that the chamber (22) is substantially annular and the opening (27) provided in its base (23) is disposed facing said substantially vertical well (12) of the burner body, whereby it is provided a multiple ring burner wherein all the primary air (F) needed to operate the first, central burner and the second, annular burner is delivered respectively to the first and second gas injectors exclusively from above the top plate (P) whilst the secondary air (8) needed for the multiple gas rings is also delivered to the base of the flames exclusively from above the top plate (P).
  2. Gas burner as claimed in claim 1, characterised in that the central well (34) of the inner burner head (1) is directed substantially vertically and in that the axis of the first injector (14) is substantially vertical.
  3. Gas burner as claimed in claim 1, characterised in that the central well (34) of the inner gas burner and the first injector (14) substantially coaxial therewith are inclined at approximately 15 to 20° relative to the vertical.
  4. Gas burner as claimed in any one of the preceding claims, characterised in that it has a single annular chamber (22) in the outer burner head (3) which is provided bilaterally with passages for flames (4, 5) and in that the second, annular burner has two gas rings, the burner being of the type with three gas rings.
  5. Gas burner as claimed in any one of the preceding claims, characterised in that the support means (17, 18) of the outer burner head are integral with said outer burner head (3) and are provided in the general form of a skirt (17) projecting down below the bottom of said head (3) and a shoulder (18) surrounding the central recess (32) of the central region of said burner head (3).
  6. Gas burner as claimed in any one of the preceding claims, characterised in that the annular chamber (22) of the outer burner head (3) is closed at the top by a removable annular cover (26) placed on the lateral walls (24, 25) of the chamber (22).
  7. Gas burner as claimed in any one of the preceding claims, characterised in that the central well (34) of the inner burner head (1) has a section decreasing in the upward direction, thereby forming a first, tubular Venturi section, and in that the upper surface of the inner burner head surrounding the top orifice of the central well (34) defines, in conjunction with a removable cover (36) surmounting it, a radial, annular divergent (37) forming a second, radial annular Venturi section.
  8. Gas burner as claimed in any one of the preceding claims, characterised in that the outer burner head (3) is surrounded at the bottom by a downwardly inclined, peripheral skirt (38) and in that said peripheral skirt is provided as a removable part (39).
  9. Gas burner as claimed in any one of the preceding claims, characterised in that it has a thermocouple (Th) for detecting the presence of flames and/or an electric ignition member (Al) and in that said thermocouple and/or said ignition member co-operate with the central burner.
EP01400042A 2000-01-28 2001-01-09 Gas burner with multiple flame rings Expired - Lifetime EP1120603B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0001120 2000-01-28
FR0001120A FR2804496B1 (en) 2000-01-28 2000-01-28 MULTIPLE FLAME CROWN GAS BURNER

Publications (3)

Publication Number Publication Date
EP1120603A2 EP1120603A2 (en) 2001-08-01
EP1120603A3 EP1120603A3 (en) 2001-08-16
EP1120603B1 true EP1120603B1 (en) 2005-07-27

Family

ID=8846429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400042A Expired - Lifetime EP1120603B1 (en) 2000-01-28 2001-01-09 Gas burner with multiple flame rings

Country Status (9)

Country Link
US (1) US6325619B2 (en)
EP (1) EP1120603B1 (en)
AT (1) ATE300704T1 (en)
DE (1) DE60112137T2 (en)
DK (1) DK1120603T3 (en)
ES (1) ES2245970T3 (en)
FR (1) FR2804496B1 (en)
HK (1) HK1038959A1 (en)
PT (1) PT1120603E (en)

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DK1120603T3 (en) 2005-11-21
DE60112137D1 (en) 2005-09-01
FR2804496A1 (en) 2001-08-03
US20010010897A1 (en) 2001-08-02
ATE300704T1 (en) 2005-08-15
DE60112137T2 (en) 2006-04-13
EP1120603A2 (en) 2001-08-01
ES2245970T3 (en) 2006-02-01
PT1120603E (en) 2005-11-30
EP1120603A3 (en) 2001-08-16
FR2804496B1 (en) 2002-07-19
US6325619B2 (en) 2001-12-04

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