EP0953804A1 - Flamestrip for atmospheric and premixing gas burner - Google Patents
Flamestrip for atmospheric and premixing gas burner Download PDFInfo
- Publication number
- EP0953804A1 EP0953804A1 EP99401012A EP99401012A EP0953804A1 EP 0953804 A1 EP0953804 A1 EP 0953804A1 EP 99401012 A EP99401012 A EP 99401012A EP 99401012 A EP99401012 A EP 99401012A EP 0953804 A1 EP0953804 A1 EP 0953804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slots
- flame
- axis
- offset
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
- F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
Definitions
- the invention relates to a gas burner atmospheric and premixed and concerns more particularly the distribution of the outlet orifices of flame on the burner rail.
- Gas burners in particular for bath heaters or boilers usually consist of two half-shells stamped lines delimiting the air-gas mixing chamber, the shells being assembled to form an orifice longitudinal, which is capped with a sheet metal grid provided a plurality of gas outlet ports.
- the ramps of burner thus produced are generally placed side by side side and parallel to form a unit capable of operate with different kinds of gas.
- a conventional embodiment of a burner ramp consists in piercing the flame outlet grid with a succession of orifices in the form of rectangular slots which are aligned close to one another.
- the length of the strip covered by the orifices defines the total length of the flame obtained.
- the surface covered by the flame obviously corresponds to the product of this total length by the width which is none other than the length of a slit.
- the flame is thus concentrated and the flame front is delimited by the perimeter of the slots thus aligned.
- the contact surface between the air and the flame corresponds to this perimeter, which limits the entry of cooling air; therefore the sheet metal parts adjacent to the slots are brought to high temperature and subjected to thermomechanical stresses; the production of No x linked to the flame temperature is therefore not negligible.
- the invention provides a new solution in the arrangement of the flame exit orifices, which allows an increase in the flame front at the same time as a reduction in its thickness, and which goes in the direction of improving stability. flame, better cooling, and reduced emission of No x .
- the subject of the invention is therefore an exit ramp from flames for atmospheric and premix gas burner comprising a sheet metal grid pierced with a succession of rectangular slots, ramp along which the slots are distributed on either side of the longitudinal axis of the grid and form a sinusoid extending over the entire length of the grid, which increases the length of the front of flames.
- the slots are spaced apart others by a constant distance along the axis of the wire rack.
- the slots are identical, each of them being offset from its immediate neighbor.
- Figure 1 a plan view of a burner rail.
- FIG 2 an enlarged plan view of the ramp slots as shown in Figure 1.
- Figures 3 and 4 plan views of a variant of burner rail respectively an overview and a view on a larger scale.
- FIGS 5 and 6 similar views of another burner rail variant.
- FIG. 1 a flame outlet grid formed of a strip 1 made of sheet metal from which are cut slots 2 which are distributed on either side of the longitudinal axis 3 of the grid, and arranged in lace.
- Figure 2 shows these slots 2 of general rectangular shape. The slots are identical and spaced from each other by a constant distance e along axis 3. On the other hand, perpendicular to this axis, each slot is offset from its neighbor immediate, with half a slot length l / 2. This half length l / 2 is preferable but not compulsory. Through example it could be variable between l / 5 and l / 0.5.
- the ends of the slots form thus a sinusoid on either side of axis 3 as it appears on the left side of Figure 1, this sinusoid extending over the entire length of the grid.
- the slots are sized to prevent returns from flame and peeling or blowing. Lag thus introduced between the slots, relative to a conventional alignment, increases the length of the front flame, since this corresponds to the sinusoid of slots.
- This developed perimeter can reach, or even exceed three times the length of the flame front by one traditional grid which makes it possible to obtain a rate high primary air. Similarly, the area covered by the flame is seriously increased, up to six times. Through against the thickness of the flame is reduced by 70%.
- the flame is thus "stretched" along a path sinusoidal having greater contact with the atmosphere surrounding which allows greater access to air secondary, promoting combustion as well as cooling.
- the fact that the flame is shorter allows to place the burner closer to the heat exchanger heat which increases its yield and makes it possible to obtain a more compact device.
- the products of hot combustion are cooled and vented over quickly. Also because there are more surfaces of contact between each slot and the metal part neighbor, the temperature distribution and the burner cooling are better. So we have a bearable heating of the metal constituting the outputs of flame. Since there are fewer constraints thermomechanical, the life of the burner is increased.
- the slots 2 are of different length. There are slots having a length L and slots shorter of length l, the latter being centered on axis 3. the longer slots are grouped by pair, alternating with the short ones and they are shifted alternately on either side of the axis. The ends of the slots staggered along the axis form also a sinusoid, but less regular than that of the figure 1.
- the burner arm made with an outlet grid of flame of this type consists of a shaped shell classic whose dimensions have been optimized for obtain a primary aeration rate close to the stoichiometry and a uniform distribution of the mixture air / gas outlet.
- the flames obtained have the main characteristic of being arranged in "lace" and thus offer the maximum of contact surface with surrounding air.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
L'invention se rapporte à un brûleur à gaz atmosphérique et à prémélange et concerne plus particulièrement la répartition des orifices de sortie de flamme sur la rampe du brûleur.The invention relates to a gas burner atmospheric and premixed and concerns more particularly the distribution of the outlet orifices of flame on the burner rail.
Les brûleurs à gaz notamment pour chauffe-bains ou chaudières sont habituellement constitués de deux demi-coquilles embouties délimitant la chambre de mélange air-gaz, les coquilles étant assemblées pour former un orifice longitudinal, lequel est coiffé d'une grille en tôle munie d'une pluralité d'orifices de sortie de gaz. Les rampes de brûleur ainsi réalisées sont généralement placées côte à côte et parallèlement pour former un ensemble capable de fonctionner avec différentes sortes de gaz.Gas burners, in particular for bath heaters or boilers usually consist of two half-shells stamped lines delimiting the air-gas mixing chamber, the shells being assembled to form an orifice longitudinal, which is capped with a sheet metal grid provided a plurality of gas outlet ports. The ramps of burner thus produced are generally placed side by side side and parallel to form a unit capable of operate with different kinds of gas.
Un certain nombre de précautions doivent être prises pour obtenir un fonctionnement correct. D'abord il faut éviter le phénomène connu de prise de feu aux injecteurs pour les gaz possédant une grande vitesse de propagation de flamme, c'est-à-dire qu'il faut réduire les orifices de sortie de flamme dans la rampe ; mais il y a une augmentation de la vitesse de sortie du mélange gaz-air primaire qui tend à produire le phénomène du décollement et du soufflage quand le gaz utilisé possède une faible vitesse de propagation de flammes. Ensuite il faut que chaque rampe de brûleur soit bien aérée, c'est-à-dire que la flamme du brûleur doit entraíner suffisamment d'air secondaire pour avoir un développement normal sans risque de décollement. Il est nécessaire enfin que l'interallumage entre les rampes de brûleur voisines s'effectue correctement pour que, même à faible débit de gaz, l'ensemble des rampes s'allume sans difficultés.A number of precautions should be taken to obtain correct operation. First you must avoid the known phenomenon of igniting the injectors for gases with a high propagation speed flame, that is to say reduce the orifices of flame outlet in the ramp; but there is a increased gas-air mixture exit speed primary which tends to produce the phenomenon of detachment and blowing when the gas used has a low flame spread rate. Then it is necessary that each burner rail is well ventilated, i.e. the burner flame must draw in enough air secondary to have a normal development without risk detachment. Finally, it is necessary that inter-ignition between neighboring burner burners is done correctly so that even at low flow rates gas, all the ramps light up without difficulty.
Une réalisation classique de rampe de brûleur consiste à percer la grille de sortie de flamme d'une succession d'orifices en forme de fentes rectangulaires qui sont alignées les unes près des autres. La longueur de la bande couverte par les orifices délimite la longueur totale de la flamme obtenue. La surface couverte par la flamme correspond évidemment au produit de cette longueur totale par la largeur qui n'est autre que la longueur d'une fente. La flamme est ainsi concentrée et le front de flamme est délimité par le périmètre des fentes ainsi alignées. La surface de contact entre l'air et la flamme correspond à ce périmètre, ce qui limite l'entrée d'air de refroidissement ; de ce fait les parties de tôle voisines des fentes sont portées à haute température et soumises à des contraintes thermomécaniques ; la production de Nox liée à la température de la flamme n'est donc pas négligeable.A conventional embodiment of a burner ramp consists in piercing the flame outlet grid with a succession of orifices in the form of rectangular slots which are aligned close to one another. The length of the strip covered by the orifices defines the total length of the flame obtained. The surface covered by the flame obviously corresponds to the product of this total length by the width which is none other than the length of a slit. The flame is thus concentrated and the flame front is delimited by the perimeter of the slots thus aligned. The contact surface between the air and the flame corresponds to this perimeter, which limits the entry of cooling air; therefore the sheet metal parts adjacent to the slots are brought to high temperature and subjected to thermomechanical stresses; the production of No x linked to the flame temperature is therefore not negligible.
L'invention apporte une solution nouvelle dans l'arrangement des orifices de sortie de flammes, qui permet un accroissement du front de flamme en même temps qu'une réduction de son épaisseur, et qui va dans le sens d'une amélioration de la stabilité de la flamme, d'un meilleur refroidissement, et d'une émission réduite de Nox.The invention provides a new solution in the arrangement of the flame exit orifices, which allows an increase in the flame front at the same time as a reduction in its thickness, and which goes in the direction of improving stability. flame, better cooling, and reduced emission of No x .
L'invention a donc pour objet une rampe de sortie de flammes pour brûleur à gaz atmosphérique et à prémélange comportant une grille en tôle percée d'une succession de fentes rectangulaires, rampe selon laquelle les fentes sont réparties de part et d'autre de l'axe longitudinal de la grille et forment une sinusoïde s'étendant sur toute la longueur de la grille, qui augmente la longueur du front de flammes.The subject of the invention is therefore an exit ramp from flames for atmospheric and premix gas burner comprising a sheet metal grid pierced with a succession of rectangular slots, ramp along which the slots are distributed on either side of the longitudinal axis of the grid and form a sinusoid extending over the entire length of the grid, which increases the length of the front of flames.
Avantageusement les fentes sont espacées les unes des autres d'une distance constante selon l'axe de la grille.Advantageously, the slots are spaced apart others by a constant distance along the axis of the wire rack.
Selon une variante préférentielle de réalisation, les fentes sont identiques, chacune d'entre elles étant décalée par rapport à sa voisine immédiate.According to a preferred embodiment, the slots are identical, each of them being offset from its immediate neighbor.
D'autres variantes et d'autres avantages de l'invention seront mieux perçus à la lecture de la description suivante dans laquelle il est fait référence aux dessins annexés qui représentent :Other variants and advantages of the invention will be better perceived on reading the following description in which reference is made to the accompanying drawings which represent:
Figure 1, une vue en plan d'une rampe de brûleur.Figure 1, a plan view of a burner rail.
Figure 2, une vue en plan à plus grande échelle des fentes de la rampe selon la figure 1.Figure 2, an enlarged plan view of the ramp slots as shown in Figure 1.
Figures 3 et 4 des vues en plan d'une variante de rampe de brûleur respectivement une vue d'ensemble et une vue à plus grande échelle.Figures 3 and 4 plan views of a variant of burner rail respectively an overview and a view on a larger scale.
Figures 5 et 6, des vues analogues d'une autre variante de rampe de brûleur.Figures 5 and 6, similar views of another burner rail variant.
On voit à la figure 1 une grille de sortie de flamme
formée d'une bande 1 en tôle dans laquelle sont découpées
des fentes 2 qui sont réparties de part et d'autre de
l'axe longitudinal 3 de la grille, et disposées en
dentelle. La figure 2 fait apparaítre ces fentes 2 de
forme générale rectangulaire. Les fentes sont identiques
et espacées les unes des autres d'une distance e constante
selon l'axe 3. Par contre, perpendiculairement à cet axe,
chaque fente est décalée par rapport à sa voisine
immédiate, d'une demi-longueur de fente ℓ/2. Cette demi-longueur
ℓ/2 est préférentielle mais non obligatoire. Par
exemple elle pourrait être variable entre ℓ/5 et ℓ/0,5.
L'important est que les extrémités des fentes forment
ainsi une sinusoïde de part et d'autre de l'axe 3 comme
cela apparaít sur la partie gauche de la figure 1, cette
sinusoïde s'étendant sur toute la longueur de la grille.
Les fentes sont dimensionnées pour éviter les retours de
flamme et le décollement ou le soufflage. Le décalage
ainsi introduit entre les fentes, par rapport à un
alignement classique, augmente la longueur du front de
flamme, puisque celui-ci correspond à la sinusoïde des
fentes.We see in Figure 1 a flame outlet grid
formed of a
Ce périmètre développé peut atteindre, voire dépasser trois fois la longueur du front de flamme d'une grille traditionnelle ce qui permet d'obtenir un taux d'air primaire élevé. De même la surface couverte par la flamme est sérieusement augmentée, jusqu'à six fois. Par contre l'épaisseur de la flamme est réduite de 70 %.This developed perimeter can reach, or even exceed three times the length of the flame front by one traditional grid which makes it possible to obtain a rate high primary air. Similarly, the area covered by the flame is seriously increased, up to six times. Through against the thickness of the flame is reduced by 70%.
La flamme est ainsi "étirée" selon un cheminement sinusoïdal ayant un plus grand contact avec l'atmosphère environnante qui autorise un accès plus important à l'air secondaire, favorisant la combustion ainsi que le refroidissement. Le fait que la flamme soit plus courte permet de placer le brûleur plus près de l'échangeur de chaleur ce qui accroít son rendement et permet d'obtenir un appareil plus compact. De même les produits de combustion chauds sont refroidis et évacués plus rapidement. Du fait aussi qu'il y a davantage de surfaces de contact entre chaque fente et la partie métallique voisine, la répartition de température et le refroidissement du brûleur sont meilleurs. On a donc un échauffement supportable du métal constitutif des sorties de flamme. Puisqu'il y a moins de contraintes thermomécaniques, la durée de vie du brûleur s'en trouve augmentée.The flame is thus "stretched" along a path sinusoidal having greater contact with the atmosphere surrounding which allows greater access to air secondary, promoting combustion as well as cooling. The fact that the flame is shorter allows to place the burner closer to the heat exchanger heat which increases its yield and makes it possible to obtain a more compact device. Likewise the products of hot combustion are cooled and vented over quickly. Also because there are more surfaces of contact between each slot and the metal part neighbor, the temperature distribution and the burner cooling are better. So we have a bearable heating of the metal constituting the outputs of flame. Since there are fewer constraints thermomechanical, the life of the burner is increased.
Grâce à cette disposition, on obtient une stabilité de flamme améliorée. Du fait de l'accroissement d'air secondaire, il y a élimination du CO et réduction de l'émission de Nox.Thanks to this arrangement, improved flame stability is obtained. Due to the increase in secondary air, there is elimination of CO and reduction of the emission of No x .
Dans la variante de réalisation illustrée aux
figures 3 et 4, les fentes 2 sont de longueur différentes.
On trouve des fentes ayant une longueur L et des fentes
plus courtes de longueur ℓ, ces dernières étant centrées
sur l'axe 3. les fentes plus longues sont groupées par
paire, en alternance avec les courtes et elles sont
décalées alternativement de part et d'autre de l'axe. Les
extrémités des fentes échelonnées le long de l'axe forment
aussi une sinusoïde, mais moins régulière que celle de la
figure 1.In the variant embodiment illustrated in
Figures 3 and 4, the
On retrouve aussi les deux longueurs de fente dans
encore une autre variante de réalisation montrée aux
figures 5 et 6. Dans ce cas la plupart des fentes sont
décalées par rapport à l'axe 3 et l'échelonnement de leurs
extrémités est moins prononcé que dans le cas précédent.We also find the two slot lengths in
yet another alternative embodiment shown in
Figures 5 and 6. In this case most of the slots are
offset from
Dans les deux cas les fentes gardent le même espacement e.In both cases the slots keep the same spacing e.
Le bras de brûleur réalisé avec une grille de sortie de flamme de ce type se compose d'une coquille de forme classique dont les dimensions ont été optimisées pour obtenir un taux d'aération primaire proche de la stoechiométrie et une répartition uniforme du mélange air/gaz en sortie. A puissance maximum, les flammes obtenues ont la caractéristique principale d'être disposées en "dentelle" et d'offrir ainsi le maximum de surface de contact avec l'air environnant.The burner arm made with an outlet grid of flame of this type consists of a shaped shell classic whose dimensions have been optimized for obtain a primary aeration rate close to the stoichiometry and a uniform distribution of the mixture air / gas outlet. At maximum power, the flames obtained have the main characteristic of being arranged in "lace" and thus offer the maximum of contact surface with surrounding air.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9805295 | 1998-04-28 | ||
| FR9805295A FR2777978B1 (en) | 1998-04-28 | 1998-04-28 | FLAME OUTPUT RAMP FOR ATMOSPHERIC GAS AND PREMIX BURNER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0953804A1 true EP0953804A1 (en) | 1999-11-03 |
| EP0953804B1 EP0953804B1 (en) | 2003-06-04 |
Family
ID=9525740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99401012A Expired - Lifetime EP0953804B1 (en) | 1998-04-28 | 1999-04-26 | Flamestrip for atmospheric and premixing gas burner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6123543A (en) |
| EP (1) | EP0953804B1 (en) |
| JP (1) | JPH11337017A (en) |
| AT (1) | ATE242457T1 (en) |
| DE (1) | DE69908486D1 (en) |
| FR (1) | FR2777978B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053877B4 (en) * | 2000-10-31 | 2004-10-07 | Robert Bosch Gmbh | Burner plate for a gas burner |
| DE102022212226A1 (en) | 2022-11-17 | 2024-05-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | burner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1816948A1 (en) * | 1968-12-24 | 1970-06-25 | Vaillant Joh Kg | Bunsen burner |
| FR2319080A1 (en) * | 1975-07-21 | 1977-02-18 | Remeha Fabrieken Bv | ATMOSPHERIC GAS BURNER |
| DE9202096U1 (en) * | 1991-02-22 | 1992-04-02 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | burner |
| EP0773404A2 (en) * | 1995-11-09 | 1997-05-14 | Robert Bosch Gmbh | Burner |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2644515A (en) * | 1947-12-22 | 1953-07-07 | Rheem Mfg Co | Gas burner head with secondary air feed grooves |
| GB1255602A (en) * | 1967-09-30 | 1971-12-01 | Sutherland Ltd Ag | Gas burners |
| US3780954A (en) * | 1970-05-15 | 1973-12-25 | Robertshaw Controls Co | Burner construction |
| DE2132968A1 (en) * | 1970-07-04 | 1972-01-13 | Guiseppe Fogliani | Gas burner |
| GB1414979A (en) * | 1972-12-07 | 1975-11-26 | Robinson D H | Gas burners |
| GB1473959A (en) * | 1975-08-14 | 1977-05-18 | Aeromatic Co Ltd | Natural gas burners |
| DE2629988A1 (en) * | 1976-07-03 | 1978-01-05 | Haller Meurer Werke Ag | BOX-SHAPED BURNER TUBE FOR ALL-GAS BURNERS OF GAS HEATERS |
| EP0009831B1 (en) * | 1978-07-28 | 1984-01-18 | Aldo Polidoro | Atmospheric gas burner with groups of vents for the passage of the mixture of combustible gas and combustion air |
| US5215457A (en) * | 1990-01-24 | 1993-06-01 | Worgas Bruciatori S.R.L. | Combustion process and gas burner with low nox, co emissions |
-
1998
- 1998-04-28 FR FR9805295A patent/FR2777978B1/en not_active Expired - Fee Related
-
1999
- 1999-04-21 US US09/295,097 patent/US6123543A/en not_active Expired - Fee Related
- 1999-04-26 DE DE69908486T patent/DE69908486D1/en not_active Expired - Lifetime
- 1999-04-26 EP EP99401012A patent/EP0953804B1/en not_active Expired - Lifetime
- 1999-04-26 AT AT99401012T patent/ATE242457T1/en not_active IP Right Cessation
- 1999-04-28 JP JP11122276A patent/JPH11337017A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1816948A1 (en) * | 1968-12-24 | 1970-06-25 | Vaillant Joh Kg | Bunsen burner |
| FR2319080A1 (en) * | 1975-07-21 | 1977-02-18 | Remeha Fabrieken Bv | ATMOSPHERIC GAS BURNER |
| DE9202096U1 (en) * | 1991-02-22 | 1992-04-02 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | burner |
| EP0773404A2 (en) * | 1995-11-09 | 1997-05-14 | Robert Bosch Gmbh | Burner |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE242457T1 (en) | 2003-06-15 |
| EP0953804B1 (en) | 2003-06-04 |
| DE69908486D1 (en) | 2003-07-10 |
| US6123543A (en) | 2000-09-26 |
| FR2777978B1 (en) | 2000-06-16 |
| FR2777978A1 (en) | 1999-10-29 |
| JPH11337017A (en) | 1999-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2870410B1 (en) | Surface-combustion gas burner | |
| US5215457A (en) | Combustion process and gas burner with low nox, co emissions | |
| EP0373157B1 (en) | Combustion process and gas burner with low nox, co emission | |
| EP1195556A1 (en) | Gas burner and cooking appliance using such burner | |
| EP0674135A1 (en) | Gas burners for industrial furnaces | |
| EP0953804B1 (en) | Flamestrip for atmospheric and premixing gas burner | |
| FR2511478A1 (en) | BURNER WITH GAS MIX | |
| EP2041489A1 (en) | Tunnel oven for biscuit-making machine | |
| EP1030107B1 (en) | Premix gas burner | |
| EP3997384A1 (en) | Modular burner and furnace comprising this burner | |
| FR2508618A1 (en) | METHOD AND DEVICE FOR ESTABLISHING AN INTENSE EXCHANGE OF HEAT AND MATERIAL BETWEEN A GAS AND AN OBLONG BODY, IN PARTICULAR FOR THE PRE-HEATING OR DRYING OF METALLIC BARS | |
| KR20040049056A (en) | device for promoting mixing fuel and air in mixing pipe for gas radiation burner | |
| EP0089924B1 (en) | Gas burner | |
| EP3569927B1 (en) | Burner device with pulsed air/gas pre-mix | |
| FR2774745A1 (en) | PROCESS FOR HEATING PRODUCTS IN AN ENCLOSURE AND BURNER FOR THE IMPLEMENTATION OF THIS PROCESS | |
| EP0679838B1 (en) | Improvements to gas burners | |
| EP0580500A1 (en) | Gas burner | |
| EP0631091A1 (en) | Low NOx gas burner | |
| EP0223634B1 (en) | Gas burner of the air-gas premix type | |
| EP0810404A2 (en) | Improvements relating to fuel/air fully pre-mixed burners | |
| JP2649496B2 (en) | Infrared burner | |
| WO1989001599A1 (en) | Jet impact heat exchanger | |
| EP1050712B1 (en) | Full premix gas burner with cooling system | |
| JP2002206711A (en) | Cooker burner | |
| JP2002267114A (en) | Thick and thin fuel combustion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE DK ES FR GB IT NL |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20000323 |
|
| AKX | Designation fees paid |
Free format text: AT BE DE DK ES FR GB IT NL |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Designated state(s): AT BE DE DK ES FR GB IT NL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030604 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20030604 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030604 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030604 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 69908486 Country of ref document: DE Date of ref document: 20030710 Kind code of ref document: P |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030904 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030905 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030915 |
|
| NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20030604 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040430 |
|
| 26N | No opposition filed |
Effective date: 20040305 |
|
| BERE | Be: lapsed |
Owner name: S.A. SAUNIER DUVAL EAU CHAUDE CHAUFFAGE *SDECC Effective date: 20040430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20041231 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |