EP0195360B1 - Brûleur atmosphérique à gaz - Google Patents

Brûleur atmosphérique à gaz Download PDF

Info

Publication number
EP0195360B1
EP0195360B1 EP86103318A EP86103318A EP0195360B1 EP 0195360 B1 EP0195360 B1 EP 0195360B1 EP 86103318 A EP86103318 A EP 86103318A EP 86103318 A EP86103318 A EP 86103318A EP 0195360 B1 EP0195360 B1 EP 0195360B1
Authority
EP
European Patent Office
Prior art keywords
burner
fins
bodies
gas burner
pocket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86103318A
Other languages
German (de)
English (en)
Other versions
EP0195360A2 (fr
EP0195360A3 (en
Inventor
Hans Dr. Viessmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6265423&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0195360(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AT86103318T priority Critical patent/ATE53650T1/de
Publication of EP0195360A2 publication Critical patent/EP0195360A2/fr
Publication of EP0195360A3 publication Critical patent/EP0195360A3/de
Application granted granted Critical
Publication of EP0195360B1 publication Critical patent/EP0195360B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F23D14/02—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
    • F23D14/10—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 elongated tubular burner head
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2203/00—Flame cooling methods otherwise than by staging or recirculation
    • F23C2203/20—Flame cooling methods otherwise than by staging or recirculation using heat absorbing device in flame

Definitions

  • the invention relates to an atmospheric gas burner according to the preamble of the main claim.
  • fins are arranged next to each outflow opening on the burner tube, which are formed from more or less large sheets with bends at the upper free end, these sheets being used only for gas / air mixing and flame stabilization.
  • Such flame cooling is also not achievable with the burner according to GB-A-1 038 216, since the element arranged above the burner tube is a box-shaped structure with an open top that extends almost over the entire length of the burner tube long slot in the bottom, which is followed by a funnel-shaped inflow nozzle directed downwards against the row of outflow openings and through which air is to be supplied to the flame to an increased extent.
  • the invention is therefore based on the object of improving an atmospheric gas burner of the type mentioned in such a way that optimal NOX reduction values are to be obtained and that the reduction is also to be largely independent of the surrounding geometry, i.e. the NOX reduction should be reproducible on practically every boiler equipped with an atmospheric gas burner.
  • the floors which are advantageously rounded into the lamellae of the pocket-like body, are designed in a shape that is adapted to the curvature of the burner tube in the transverse assignment of the pocket-like bodies to the burner tube, so that the bottoms of the bodies have the same distance to the burner tube at every point.
  • the pocket-like bodies are longitudinally assigned to the burner tube, which then correspond approximately to the length of the burner tube, but can also be arranged shorter in a row as sections, the bodies forming the reducing element are arranged with their bottoms equally spaced from the surface of the burner tube.
  • the pocket-like bodies are arranged at a distance from one another which corresponds to their width, i.e. the area above the burner tube which is actually spatially occupied by the bodies is only about half of the total area occupied by flames.
  • the burner openings in the burner tubes are evenly spaced apart standing groups are arranged, the pocket-like bodies are advantageously arranged over the opening-free areas of the burner tube.
  • the reducing element consists of a plurality of such individual bodies, these are expediently arranged together on at least one carrier which is furthermore arranged such that it can be adjusted in a variable distance with respect to the burner tube, which provides a further possibility for optimizing the NOX reduction, with which possibility the fact is taken into account that the gases used can have different compositions, which may require different distance settings of the reducing element to the burner tube.
  • such pocket-shaped bodies can also be arranged in the longitudinal direction, that is to say parallel to the longitudinal axis of the burner tube, with a corresponding length dimensioning, such bodies are then advantageously provided in their bottoms with air inflow openings in order to ensure the aforementioned chimney effect even with such relatively long bodies.
  • the atmospheric gas burner consists of at least one burner tube 2 with a plurality of gas outflow openings 1 arranged in groups 6, the elements which reduce the flame temperature and thus the NOX formation being arranged in the flame region above the burner tube 2 .
  • FIGS. 1, 2 For the sake of simplicity, FIGS.
  • the reducing element is always formed from the same individual parts, which are basically perpendicular to one another at a distance from one another
  • lamellae 3 which delimit flame shafts 4 and which, as shown and oriented to the normally given arrangement of the gas outlet openings 1, are preferably arranged transversely to the longitudinal axis of the burner tube.
  • This simplest embodiment is illustrated in the middle area of the burner tube in FIG. 1. With reference to FIG. 3, the fins 3 are cut following the curvature of the burner tube 2.
  • small feet 3 'on the slats ensure a corresponding spacing.
  • two slats 3 with side walls 7 are advantageously and preferably combined to form a shaft box 8, these boxes 8 each above an opening group 6 (on the right in FIGS. 1, 2) or between two opening group 6 (left in Fig. 1, 2) can be arranged above the burner tube 2.
  • This training as a shaft box 8 has the advantage that the lamellae 3 experience stiffening and are therefore less subject to warping due to the action of heat.
  • the effort required to attach the fins 3 to the burner tube is considerably reduced in comparison to the attachment of individual fins 3.
  • side walls 3 serving as fastening and holding elements side walls 3 can optionally be perforated in the vicinity of the burner tube 2 and provided in the fastening area with elongated holes for which small stud bolts are dotted on the burner tube, so that the boxes 8 with respect to their lower edges 5 Burner tube 2 can be fixed at variable distances.
  • the boxes 8 themselves form the flame shafts 4, while in an arrangement of the boxes 8 between groups of openings (on the left in FIGS. 1, 2) the flame shafts 4 are each delimited by two boxes 8 . Irrespective of whether the boxes 8 are now arranged directly above an opening group 6 or between two opening groups 6, corresponding shafts are created by arranging the boxes 8 next to one another. Even with a group arrangement and configuration, as shown in FIGS. 1, 2, the fins 3 could of course also be oriented parallel to the longitudinal burner tube, i.e. in rows one behind the other and next to one another, with relatively short fins being preferred due to the risk of warping.
  • the reducing element is formed from a plurality of pocket-like bodies 9, which are arranged at the sides and open at the top and are distributed over the gas outflow openings 1 of the burner tube 2, the ends 10 of which advantageously merge into the lamellae when arranged transversely to the burner tube 2 are also adapted in shape to the curvature of the burner tube 2.
  • Such bodies 9 can be easily made of suitable metallic material with appropriate molding tools in one Pull operation. Since, taking into account the usual lengths of burner tubes 2, at least about ten such bodies 9 must be assigned to each burner tube, the whole is formed into a uniformly attachable element, with the aid of two side supports 13, as can be seen in FIGS. 6, 7.
  • This attachment is preferably and advantageously also adjustable, so that the entire structure can be adjusted with the optimum distance from the burner tube 2.
  • the bodies 9 are expediently arranged at the same distance from one another on the burner tube 2 or on the supports 13. Since the gas outflow openings 1 are usually provided on such burner tubes 2, as also shown in FIGS. 4, 5 and as mentioned above, in groups 6, the pocket-like bodies 9 are advantageously arranged above the opening-free areas of the burner tube 2, since this Flames standing above the gas outflow openings 1 are least disturbed. The flames burn freely in the spaces between two bodies 9, which in turn, since they are open on the side (see flow arrow in Fig. 7), are open to the lateral inflow of secondary air, which thereby cools the fins 3, so that the latter continuously remove heat from the hot flame area, which counteracts NOX formation.
  • the bodies 9 are also possible to dimension them accordingly long and to arrange them parallel to the longitudinal extension of the burner tube, as indicated in FIG. 8.
  • the bodies 9 could also be arranged in the form of a number of short pieces in a row in the longitudinal direction in such an arrangement, but this requires a greater amount of support, in the embodiment according to FIG. 8 the bodies 9 have air inlet openings advantageously in the bottoms 10 11, for example in the form of slots, in order to achieve the cooling "chimney effect" within the body 9 in this embodiment as well.
  • Appropriate shaping of the holder 13 also ensures in this embodiment that the bottoms 10 of all the longitudinally extending bodies 9 are at the same distance from the surface of the burner tube 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Glass Compositions (AREA)

Claims (13)

1. Brûleur à gaz atmosphérique constitué d'au moins un tube de brûleur (2) avec plusieurs orifices de sortie de gaz (1), tandis que des élémentes sous forme de lamelles (3), réduisant la température de flammes, et donc la formation de NOX, sont disposés au-dessus du tube de brûleur (2) dans la zone des flammes, caractérisé en ce que, dans le cas d'un tube de brûleur (2) dont les orifices de sortie de gaz (1) sont disposés par groupes (6), deux lamelles (3) délimitent chaque fois un passage de flamme (4) et que les lamelles (3) délimitant le passage sont disposées au-dessus d'un groupe (6) ou entre deux groupes (6) du tube de brûleur.
2. Brûleur à gaz selon la revendication 1, caractérisé en ce que les lamelles (3) sont disposées avec leur bord inférieur (5) à distance par rapport à la surface du tube de brûleur (2).
3. Brûleur à gaz selon la revendication 1 ou 2, caractérisé en ce que deux des lamelles (3) constituent ensemble une boîte de passage (8) avec des parois latérales (7).
4. Brûleur à gaz selon l'une des revendications 1 à 3, caractérisé en ce que les lamelles (3) sont montées avec possibilité de modifier leur distance par rapport au tube de brûleur (2).
5. Brûleur à gaz selon la revendication 1, caractérisé en ce que deux lamelles (3) forment ensemble un corps (9) en forme de poche, ouvert latéralement vers le dessus.
6. Brûleur à gaz selon la revendication 5, caractérisé en ce que les fonds (10) des corps (9) en forme de poche présentent un profil adapté à la courbure du tube de brûleur (2) en cas de disposition transversale par rapport au tube de brüleur (2).
7. Brûleur à gaz selon la revendication 5, caractérisé en ce que les corps (9) en forme de poche sont disposés avec leur fond (10) à distance égale par rapport à la suface du tube de brûleur (2) en cas de disposition longitudinale par rapport au tube de brûleur (2). (figure 8).
8. Brûleur à gaz selon la revendication 7, caractérisé en ce que les corps (9) en forme de poche sont pourvus, dans leur fond (10), d'orifices d'entrée d'air (11).
9. Brûleur à gaz selon l'une des revendications 5 à 8, caractérisé en ce que les corps (9) en forme de poche sont disposés avec une distance mutuelle correspondant à leur largeur.
10. Brûleur à gaz selon l'une des revendications 5 à 9, caractérisé en ce que les corps (9) en forme de poche sont disposés au-dessus des zones (12) dépourvues d'orifices du tube de brûleur (2).
11. Brûleur à gaz selon l'une des revendications 5 à 10, caractérisé en ce que les corps (9) en forme de poche sont disposés ensemble sur au moins un support (13).
12. Brûleur à gaz selon la revendication 11, caractérisé en ce que les corps (9) en forme de poche sont disposés sur leur support (13) avec possibilité de réglage de leur distance par rapport au tube de brûleur (2).
13. Brûleur à gaz selon l'une des revendications 1 à 12, caractérisé en ce que la hauteur des lamelles (3) est égale, au maximum, à la moitié du diamètre du tube de brûleur (2).
EP86103318A 1985-03-16 1986-03-12 Brûleur atmosphérique à gaz Expired - Lifetime EP0195360B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103318T ATE53650T1 (de) 1985-03-16 1986-03-12 Atmosphaerischer gasbrenner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509521 1985-03-16
DE19853509521 DE3509521A1 (de) 1985-03-16 1985-03-16 Atmosphaerischer gasbrenner

Publications (3)

Publication Number Publication Date
EP0195360A2 EP0195360A2 (fr) 1986-09-24
EP0195360A3 EP0195360A3 (en) 1987-04-22
EP0195360B1 true EP0195360B1 (fr) 1990-06-13

Family

ID=6265423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103318A Expired - Lifetime EP0195360B1 (fr) 1985-03-16 1986-03-12 Brûleur atmosphérique à gaz

Country Status (5)

Country Link
US (1) US4652236A (fr)
EP (1) EP0195360B1 (fr)
AT (1) ATE53650T1 (fr)
CA (1) CA1261246A (fr)
DE (1) DE3509521A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059115A (en) * 1985-06-13 1991-10-22 British Gas Plc Fuel fired burner
DE3634358A1 (de) * 1985-10-05 1987-06-11 Vaillant Joh Gmbh & Co Brenner, insbesondere atmosphaerischer vormisch-gasbrenner, sowie kuehlstaebe fuer einen solchen brenner
EP0245391B1 (fr) * 1985-11-15 1991-04-03 Joh. Vaillant GmbH u. Co. Bruleur a gaz atmospherique avec premelangeur
DE3724761C1 (de) * 1987-07-25 1988-09-15 Wolf Gmbh Richard Video-Endoskop
US4936772A (en) * 1988-01-25 1990-06-26 John Zajac Flame ashing process and apparatus for stripping photoresist
NL8900030A (nl) * 1989-01-06 1990-08-01 Remeha Fabrieken Bv Nox-arme atmosferische gasbrander.
DE4107681A1 (de) * 1990-07-16 1992-01-23 Buderus Heiztechnik Gmbh Atmosphaerischer gasbrenner
US5052921A (en) * 1990-09-21 1991-10-01 Southern California Gas Company Method and apparatus for reducing NOx emissions in industrial thermal processes
US5448969A (en) * 1994-03-23 1995-09-12 Bowles Fluidics Corporation Fluidic burner
IT1258579B (it) * 1992-04-28 1996-02-27 Polidoro Aldo Bruciatore di gas atmosferico del tipo a miscelazione cosiddetta iperstechiometrica
DE4223513C2 (de) * 1992-07-17 1998-01-15 Stiebel Eltron Gmbh & Co Kg Gasbrenner
EP0599395A1 (fr) * 1992-11-20 1994-06-01 WITTEVEEN, Gustaaf Jan Brûleur avec production minime d'NOx
US5441402A (en) * 1993-10-28 1995-08-15 Gas Research Institute Emission reduction
GB2302401B (en) * 1995-06-15 1999-08-04 British Gas Plc Fuel fired burners
US6056542A (en) * 1998-02-20 2000-05-02 Bradford White Corporation Burner for reducing nitrogen oxides and carbon monoxide
TW200830961A (en) * 2007-01-02 2008-07-16 Unimicron Technology Corp Circuit substrate and surface treatment process thereof
EP2249082B1 (fr) * 2008-02-01 2019-04-10 IHI Corporation Réchauffeur à combustion
US9222410B2 (en) 2011-04-13 2015-12-29 General Electric Company Power plant
CN103062749A (zh) * 2013-01-29 2013-04-24 山西省第二建筑工程公司 提高燃气锅炉热效率的方法
US10571124B2 (en) 2013-02-14 2020-02-25 Clearsign Combustion Corporation Selectable dilution low NOx burner
CN108291717B (zh) * 2016-01-13 2020-12-11 美一蓝技术公司 瓷砖组之间具有间隙的穿孔火焰保持器
WO2017190080A1 (fr) 2016-04-29 2017-11-02 Clearsign Combustion Corporation Système de brûleur avec stabilisateurs de flamme transversaux distincts
US10598375B2 (en) 2016-11-01 2020-03-24 Honeywell International Inc. Asymmetrical and offset flare tip for flare burners

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139353A1 (fr) * 1983-07-20 1985-05-02 The British Petroleum Company p.l.c. Brûleur

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1462643A (en) * 1922-09-13 1923-07-24 Home Comfort Heater Co Gas heater for furnaces, stoves, or apartments
US2193176A (en) * 1938-03-28 1940-03-12 Phillips Petroleum Co Gas heater
DE960571C (de) * 1951-11-10 1957-03-21 Emil Alexander Brenner fuer heizwertarme Heizgase mit niedriger Zuendgeschwindigkeit
US3051464A (en) * 1958-10-20 1962-08-28 Maxon Premix Burner Company Air-heating gas burner
US3177923A (en) * 1961-11-27 1965-04-13 C A Olsen Mfg Co Gas burner
US3178161A (en) * 1963-03-05 1965-04-13 Maxon Premix Burner Company In Air heating gas burner
GB1038216A (en) * 1963-07-25 1966-08-10 Albert Horace Greaves A new or improved burner for high calorific value gases
FR1522519A (fr) * 1967-03-07 1968-04-26 Applic Gaz Sa Perfectionnements aux brûleurs à gaz pour le chauffage par rayonnement
GB1232596A (fr) * 1967-09-29 1971-05-19
GB1231189A (fr) * 1967-11-23 1971-05-12
US3494712A (en) * 1968-07-01 1970-02-10 Coen Co Duct burner
US3574507A (en) * 1969-07-31 1971-04-13 Gen Electric Air/fuel mixing and flame-stabilizing device for fluid fuel burners
US3732059A (en) * 1971-05-28 1973-05-08 Zink Co John Burner for gaseous fuels in reduced oxygen and/or significant velocity atmosphere
US3843309A (en) * 1973-03-07 1974-10-22 Gen Electric Liquid fuel grid burner for vitiated air using auxiliary combustion air
US4284402A (en) * 1979-05-02 1981-08-18 Atlantic Richfield Company Flame modifier to reduce NOx emissions
US4462795A (en) * 1980-08-28 1984-07-31 Coen Company, Inc. Method of operating a wall fired duct heater
US4525141A (en) * 1983-07-11 1985-06-25 Gas Research Institute Regulation of blue flame combustion emissions
DE8507804U1 (de) * 1985-03-16 1985-05-15 Viessmann Werke Kg, 3559 Allendorf Atmosphärischer Gasbrenner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139353A1 (fr) * 1983-07-20 1985-05-02 The British Petroleum Company p.l.c. Brûleur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Wärme-Gas-International, Band 30 (1981), Heft 1, Seiten 41,42 *

Also Published As

Publication number Publication date
US4652236A (en) 1987-03-24
EP0195360A2 (fr) 1986-09-24
ATE53650T1 (de) 1990-06-15
DE3509521A1 (de) 1986-09-25
DE3509521C2 (fr) 1987-07-09
CA1261246A (fr) 1989-09-26
EP0195360A3 (en) 1987-04-22

Similar Documents

Publication Publication Date Title
EP0195360B1 (fr) Brûleur atmosphérique à gaz
EP0811818B2 (fr) Plaque de grille et procédé pour sa fabrication
DE69218531T2 (de) Brenner mit geringer Erzeugung von Stickoxiden und kleine Verbrennungsvorrichtung
EP0649821B1 (fr) Dispositif pour l'échauffement ou le refroidissement de feuilles ou de rubans de verre
DE2040825B2 (de) Verfahren und Vorrichtung zum Löten von Wärmetauscherblöcken aus Aluminium
DE2242782C3 (fr)
DE2057294B2 (de) Kernbrennstoffbaugruppe für Kernreaktoren
DE3738136C1 (de) Durchlaufofen zum Anloeten von elektronischen Bauteilen
EP0490210A1 (fr) Echangeur de chaleur
DE2747034C3 (de) Vorrichtung zum Kühlen einer nippellosen Düsenplatte zum Ziehen von Glasfasern
DE8507804U1 (de) Atmosphärischer Gasbrenner
EP0471162A1 (fr) Dispositif de séchage et/ou de fixation à convection
DE3726196A1 (de) Unter verwendung eines gestanzten blechs gefertigter gasbrennerkopf
DE3509506A1 (de) Atmosphaerischer gasbrenner
EP0869315A2 (fr) Brûleur atmosphérique à gaz
DE19538364C2 (de) Vorrichtung zur Schnellerwärmung von Metall-Preßbolzen
DE2034353A1 (de) Mit Lochern versehene Anordnungen
DE19537904A1 (de) Rostplatte
DE4041360C1 (en) Atmos. burner with elongated tube in combustion chamber - has burner tube with slotted, or perforated strip of width of 15-30 % of tube dia.
DE3813441A1 (de) Roststabelement fuer eine schubrostfeuerung zur muellverbrennung
DE2813747A1 (de) Waermetauscherlamelle und anwendungen derselben
EP0917633A1 (fr) Bruleur a gaz
AT398822B (de) Brenner
DE2919857C2 (de) Flammrohrkopf mit Kühlring für Gasturbinenbrennkammern
DE3125651C2 (de) Verfahren und Vorrichtung zum intensiven Wärme- und Stoffaustausch

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: A2

Designated state(s): AT BE CH FR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH FR IT LI LU NL SE

17P Request for examination filed

Effective date: 19870923

17Q First examination report despatched

Effective date: 19880726

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR IT LI LU NL SE

REF Corresponds to:

Ref document number: 53650

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

ET Fr: translation filed
ITF It: translation for a ep patent filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910307

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19910313

Year of fee payment: 6

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910328

Year of fee payment: 6

Ref country code: CH

Payment date: 19910328

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910329

Year of fee payment: 6

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910331

Year of fee payment: 6

Ref country code: AT

Payment date: 19910331

Year of fee payment: 6

26 Opposition filed

Opponent name: STIEBEL ELTRON GMBH & CO.KG

Effective date: 19910312

Opponent name: JOH. VAILLANT GMBH U. CO

Effective date: 19910304

NLR1 Nl: opposition has been filed with the epo

Opponent name: STIEBEL ELTRON GMBH & CO. KG

Opponent name: JOH. VAILLANT GMBH U. CO

EPTA Lu: last paid annual fee
RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

27W Patent revoked

Effective date: 19910728

NLR2 Nl: decision of opposition
BERE Be: lapsed

Owner name: VIESSMANN HANS

Effective date: 19920331

EUG Se: european patent has lapsed

Ref document number: 86103318.1

Effective date: 19911218