EP0225929B1 - Installation et utilisation de chaudières chauffées par gaz - Google Patents
Installation et utilisation de chaudières chauffées par gaz Download PDFInfo
- Publication number
- EP0225929B1 EP0225929B1 EP85115685A EP85115685A EP0225929B1 EP 0225929 B1 EP0225929 B1 EP 0225929B1 EP 85115685 A EP85115685 A EP 85115685A EP 85115685 A EP85115685 A EP 85115685A EP 0225929 B1 EP0225929 B1 EP 0225929B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- boiler
- bent
- ribs
- burner bed
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/38—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water contained in separate elements, e.g. radiator-type element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
Definitions
- the invention relates to a gas-fired boiler system with a burner bed which takes up a surface and with heat exchange tubes arranged above the burner bed parallel to the surface, the heat exchange tubes having pipelines which have a plurality of essentially radially projecting, flat fins spaced apart from one another over the length of the heat exchange tubes are provided, which have bevels at their edges and furthermore the hot flue gas rising from the burner bed flows through the spaces formed by the ribs and the pipes.
- Such a boiler system is known from DE-C 2 245 357.
- the invention further relates to the use of such a boiler system.
- Convective heat transfer is understood to be the transfer of heat from the hot air rising from the burner bed to the surfaces of a heat exchanger, while the radiant heat is exploited by the fact that the heat radiation emitted by the burner bed and the hot flue gas is essentially in the infrared range on surfaces of the heat exchanger is absorbed.
- finned tubes have been used as heat exchange tubes in heat exchangers, as is known from the aforementioned DE-C 2 245 357.
- These finned tubes consist of a straight pipeline through which a heat exchange medium, for example water, flows, from which radially circular flat ribs project, which are arranged spirally around the pipeline and extruded out of it.
- the pipeline and fins are preferably made of a copper / beryllium alloy with particularly good thermal conductivity.
- These known finned tubes have a very large heat transfer surface and are therefore particularly suitable as convective heat exchangers.
- the deflection plates can only rest on the narrow edges of the ribs, so that there is only a poor heat transfer between the deflection plates and the ribs, which in turn leads to the above-described emission of the radiant heat collected to the already cooled ones Flue gases are conveyed because the baffles cannot or only very poorly transfer their heat to the ribs due to the poor heat transfer.
- the invention is therefore based on the object of developing a gas-fired boiler system of the type mentioned in such a way that an even greater yield of radiant heat is possible while at the same time improving the convective heat transfer in order to be able to implement boiler systems with even higher efficiency.
- the bevels which are now arranged obliquely in the flow path of the rising hot flue gases result in a considerably enlarged area being available for absorbing the radiant heat, which is rigid, ie with optimal heat transfer is connected to the heat exchange tubes.
- the oblique bevels arranged in the flow path of the rising smoke gases cause the rising smoke gases to be swirled considerably more, so that the convective heat transfer to the fins of the heat exchange tube is also considerably increased.
- the gas-fired boiler system according to the invention has a significantly higher efficiency than is possible according to the prior art.
- This aspect is of particular importance for modulating gas-fired boiler systems, in which the burner output is continuously and variably set depending on the respective heat requirement, in contrast to so-called on / off burners, which either run at full power or are switched off. If a modulating boiler system is operated at a low output, it is of particular importance to remove the heat generated by the burner bed as useful as possible.
- the gas-fired boiler system according to the invention can be equipped with only one heat exchanger and also with an additional condensation heat exchanger as a condensing boiler.
- the bends to the surface of the burner bed run at an angle of approximately 45 °.
- this angle has proven to be particularly advantageous because in this case, on the one hand, a relatively large receiving area is available for absorbing the radiant heat, and on the other hand, the rising smoke gases are optimally swirled when the bends are angled at 45 ° .
- the heat exchange tubes are arranged closely next to one another as heat exchangers, and according to the invention the ribs on the side of the heat exchanger facing the burner bed are provided with the inclined folds in sections.
- the folds can also be arranged on the side of the heat exchanger which faces away from the burner bed, this measure being particularly suitable for being used together with the measure mentioned above, so that the heat exchanger then has a total of folds is provided on both sides.
- the ribs are provided with bends over part of their circumference.
- This measure has the advantage that, as already explained, the radiant heat can be collected at the folded area, on the other hand the non-bent area of the ribs can be arranged in any way as inputs or outputs from the heat exchanger.
- an exemplary embodiment of the invention is particularly preferred in which the ribs are designed in the form of an annular disk in a manner known per se and the bevels are formed by bending edge regions of the ribs in the form of circular sections.
- This measure has the advantage that conventional heat exchange tubes, which are designed as finned tubes, can be processed with known devices in order to produce the bent sections in the form of a circle.
- an exemplary embodiment has proven to be particularly important in practice, in which the ribs are divided over their circumference into eight sections of approximately the same size, which with the exception of two diametrically opposite sections are provided with the folds. This applies in particular if the non-folded sections are in the installed state of the heat exchanger perpendicular to one another to the surface of the burner bed and form openings for the entry or exit of the flue gases rising from the burner bed into or out of the intermediate spaces.
- an embodiment of the invention is preferred in which, on the side of the heat exchanger facing away from the burner bed, inclined bends of adjacent heat exchanger tubes are connected to one another via axially extending baffle plates, as is known per se, but in addition there is that the baffle plates rest on the folds.
- the deflection plates can be designed as V-profiles with an internal angle of 90 ° .
- the boiler system is designed as a condensing boiler, the flue gases rising from the burner bed first passing through the heat exchange tubes provided with the oblique bends and then being fed to a further heat exchanger designed as a condensation heat exchanger.
- the boiler system can be operated in a modulating manner in a preferred use.
- the two last-mentioned measures each have, alone or in combination, the advantage described at the outset of the greatest possible optimization of the efficiency of the entire boiler system.
- Fig. 1 designates a gas-fired boiler system as can be used for buildings of all kinds.
- the boiler system 1 is provided with an air inlet 2, which reaches the area of a burner bed 10, which is composed of several burner rods 3.
- a regulated gas supply not shown in FIG. 1, creates a flame bed above the burner bed 10, with possibly also regulated air inlet 2, so that hot air rises and reaches the area of a heat exchanger 60 there.
- the heat exchanger 60 has boiler water connections 4 for introducing or discharging the boiler water provided for the heating purposes.
- a flue gas 6 which has flowed through the heat exchanger 60 can escape to the outside via a trigger 5.
- the heat exchanger 60 consists of a multiplicity of heat exchange tubes 61, which can be partially covered by baffle plates 80, as will be explained in more detail below with reference to FIGS. 4 and 5.
- the first heat exchanger usually absorbing the radiant heat emanating from the burner bed 10 and also largely dissipating the heat contained in the rising flue gases by convective heat transfer and a second, downstream heat exchanger as a condensation heat exchanger cools the flue gas 6 by condensing the moisture contained therein and thus absorbs the heat of evaporation of this moisture.
- the cooling water first flows through the condensation heat build-up shear and then the heat exchanger 60 shown in detail in FIG. 1.
- FIG. 2 shows a side view and FIG. 3 shows a top view of a heat exchanger 11 according to the prior art above the burner bed 10.
- the heat exchanger 11 consists of a plurality of heat exchange tubes 15, 16 arranged in parallel next to one another, only two of which are shown completely in FIGS. 2 and 3.
- the heat exchange tubes 15, 16 consist of a central pipeline 17, 18, from which radially circular ribs 19, 19a ... and 20, 20a ... respectively.
- the ribs 19 and 20 run spirally around the pipelines 17, 18 and are preferably extruded therefrom.
- the pipes 17, 18 and the fins 19, 20 consist of a good heat-conducting material, preferably a copper / beryllium alloy.
- the pipelines 17, 18 are flowed through by water 21 of a building heating system.
- the ribs 19, 19a ... and 20, 20a ... are laterally provided with bevels 23 and 24, respectively, in such a way that out of the circular disk-shaped surface of the ribs 19 and 20 edge-section-shaped edge regions are angled by 90 ° .
- the bevels 23, 24 are perpendicular to the surface of the burner bed 10. This, as can clearly be seen in FIG. 2, achieves that the heat exchange tubes 15, 16 can be arranged close to one another, but between the bevels 23, 24 of adjacent heat exchange tubes 15 , 16 still has a distance 26 of, for example, one millimeter.
- the heat exchange tubes 15, 16 are each covered in pairs with baffle plates 30, which cover the space between adjacent heat exchange tubes 15, 16. For the sake of clarity, only one deflection plate, partially broken off, is shown in FIG. 3.
- flue gases 40 rise upwards and flow along a 41, essentially straight path indicated to slot-shaped openings 42 laterally delimited by the deflection plates 30 and then again out of the heat exchanger 11. as indicated by arrows 43.
- the flue gases 40 flow through spaces 44, 44a ..., which are delimited by the ribs 19, 19 a ..., the pipeline 17 and the bevels 23.
- baffle plates 30, seen from the burner bed 10 cover that "window" 48 between the pipes 17, 18, so that the baffle plates 30 absorb at least partially the radiant heat emanating from the burner bed 10 and the ascending smoke gases 40, but can be seen from FIG. 2 clearly that the interface 49 between the baffle plates 30 and the ribs 19, 19a ... or 20, 20a ... represents poor heat transfer because the ribs 19, 19a ... or 20, 20a ... only each abut the baffle plates 30 with their narrow side.
- FIGS. 4 and 5 show a heat exchanger 60, as already mentioned in FIG. 1, and how it is used for the present invention.
- the heat exchanger 60 in turn consists of heat exchange tubes 61, 62 arranged in parallel with one another, which are provided with pipes 63, 64 with radially projecting ribs 65, 65a ... and 66, 66a ..., respectively.
- heat exchange tubes used as semi-finished products in the exemplary embodiment according to FIGS. 4 and 5 correspond to those according to the prior art according to FIGS. 2 and 3, they are designed differently for use in the boiler system according to the invention.
- the ribs 65 and 66 are divided on their circumference into eight circumferential regions of approximately the same length, of which apart from two diametrically opposed regions the other six regions with bevels 70, 71, 72, 73 , 74, 75 are provided. Because of this approximately octagonal configuration, mutually adjacent bevels, for example 70, 72, form an angle 76 of 135 ° with one another.
- the non-folded areas are arranged one above the other and vertically above the burner bed 10 in the installed state of the heat exchanger 60, so that in this installed state four of the six folds, namely the folds 70, 71, 74 and 75 at an angle 77 of 45 ° to Surface of the burner bed 10 run.
- baffles 80 resting on two adjacent heat exchange tubes 61, 62 are formed on the upper side of the heat exchanger 60 as V-profiles with an internal angle of 90 °.
- the upward seal is particularly good because the baffle plates 80 further reduce the openings 86 to an even narrower slot.
- the heat transfer between the baffle plates 80 and the ribs 65 and 66 is particularly good because the baffle plates 80 do not rest flat on the folds 71 and 74 on the narrow sides of the ribs 65 and 66, but rather.
- the heat exchanger according to FIGS. 4 and 5 is clearly superior to that of FIGS. 2 and 3, because, as mentioned, the flue gases 82 are swirled on a multiple angled path in almost closed spaces 84, 84a ... so that the flue gases 82 transfer their heat almost completely to the surrounding surfaces or bends 70 to 75 of the ribs 65 or . 66 can deliver.
- the utilization of the radiant heat is also significantly improved because the burner bed 10 has a receiving surface formed by the bevels 70 and 75 on a width 90, which makes up almost two thirds of the surface of the heat exchanger 60 compared to the burner bed 10.
- ribs instead of circular disc-shaped ribs, square or rectangular ribs can also be used, a different polygon can be used instead of the octagonal shape of the folds, and the openings for the inlet and outlet of the flue gases can also be arranged off-center or offset, without this leaves the scope of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Details Of Fluid Heaters (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Claims (12)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP85115685A EP0225929B1 (fr) | 1985-12-10 | 1985-12-10 | Installation et utilisation de chaudières chauffées par gaz |
DE8585115685T DE3576193D1 (de) | 1985-12-10 | 1985-12-10 | Gasbeheizte kesselanlage und verwendung davon. |
US06/936,884 US4721068A (en) | 1985-12-10 | 1986-12-02 | Gas-fired boiler plant |
CA000524514A CA1262221A (fr) | 1985-12-10 | 1986-12-04 | Bloc chaudiere fonctionnant au gaz |
KR860010413A KR870006368A (ko) | 1985-12-10 | 1986-12-05 | 가스 보일러 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP85115685A EP0225929B1 (fr) | 1985-12-10 | 1985-12-10 | Installation et utilisation de chaudières chauffées par gaz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0225929A1 EP0225929A1 (fr) | 1987-06-24 |
EP0225929B1 true EP0225929B1 (fr) | 1990-02-28 |
Family
ID=8193928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85115685A Expired - Lifetime EP0225929B1 (fr) | 1985-12-10 | 1985-12-10 | Installation et utilisation de chaudières chauffées par gaz |
Country Status (5)
Country | Link |
---|---|
US (1) | US4721068A (fr) |
EP (1) | EP0225929B1 (fr) |
KR (1) | KR870006368A (fr) |
CA (1) | CA1262221A (fr) |
DE (1) | DE3576193D1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2030204T3 (es) * | 1987-11-03 | 1992-10-16 | Joh. Vaillant Gmbh U. Co. | Aparato calentado por quemador. |
US5163508A (en) * | 1991-12-16 | 1992-11-17 | Teledyne Industries, Inc. | Heat exchanger baffle system |
EP0807786B1 (fr) * | 1995-12-14 | 2003-04-09 | Matsushita Electric Industrial Co., Ltd. | Dispositif de combustion catalytique |
IT1282643B1 (it) * | 1996-02-16 | 1998-03-31 | Combustion Engineering S R L | Caldaia a recupero munita di tubi alettati |
US6526898B1 (en) * | 2001-12-03 | 2003-03-04 | Technology Sales & Marketing Corporation | Furnace with radiant reflectors |
KR20030090911A (ko) * | 2002-05-23 | 2003-12-01 | 주식회사 경동보일러 | 콘덴싱 가스보일러 |
US7650933B2 (en) * | 2005-03-14 | 2010-01-26 | Allied Engineering Company, Division Of E-Z-Rect Manufacturing Ltd. | Baffle for sealed combustion chamber |
DE102006017432B4 (de) * | 2006-04-06 | 2009-05-28 | Visteon Global Technologies Inc., Van Buren | Innerer Wärmeübertrager mit kalibriertem wendelförmigen Rippenrohr |
US9109844B2 (en) * | 2012-03-01 | 2015-08-18 | Rheem Manufacturing Company | Nested helical fin tube coil and associated manufacturing methods |
US10458677B2 (en) * | 2015-12-11 | 2019-10-29 | Lochinvar, Llc | Heat exchanger with dual concentric tube rings |
US11499747B2 (en) * | 2019-10-04 | 2022-11-15 | Rheem Manufacturing Company | Heat exchanger tubes and tube assembly configurations |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR667479A (fr) * | 1928-01-18 | 1929-10-17 | Perfectionnements aux échangeurs de chaleur | |
US2578136A (en) * | 1946-05-24 | 1951-12-11 | Huet Andre | Tangentially finned heat exchange tubes |
BE789060A (fr) * | 1971-09-21 | 1973-03-20 | Raypak Produkten Nv | |
US3800748A (en) * | 1973-01-08 | 1974-04-02 | Mms Ltd | Fluid heater appliance |
FR2470947A1 (en) * | 1979-12-06 | 1981-06-12 | Edine Jean Claude | Heat exchanger for boiler - has circular finned tube placed inside square section tube with fluid circulation between |
US4501232A (en) * | 1983-10-03 | 1985-02-26 | Purex Pool Products, Inc. | Pool or spa water heater |
-
1985
- 1985-12-10 DE DE8585115685T patent/DE3576193D1/de not_active Revoked
- 1985-12-10 EP EP85115685A patent/EP0225929B1/fr not_active Expired - Lifetime
-
1986
- 1986-12-02 US US06/936,884 patent/US4721068A/en not_active Expired - Fee Related
- 1986-12-04 CA CA000524514A patent/CA1262221A/fr not_active Expired
- 1986-12-05 KR KR860010413A patent/KR870006368A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
KR870006368A (ko) | 1987-07-10 |
CA1262221A (fr) | 1989-10-10 |
DE3576193D1 (de) | 1990-04-05 |
EP0225929A1 (fr) | 1987-06-24 |
US4721068A (en) | 1988-01-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0225929B1 (fr) | Installation et utilisation de chaudières chauffées par gaz | |
DE2804106C2 (de) | Wärmetauscher | |
DE2330076B2 (de) | Rippenrohr-Wärmetauscher | |
DE2951352C2 (de) | Flachrohr-Wärmetauscher | |
EP0271434A2 (fr) | Chaudière de chauffage d'acier | |
EP0092033A2 (fr) | Procédé pour la fabrication d'un échangeur de chaleur à plaques | |
CH686741A5 (de) | Dampferzeuger. | |
DE3413968A1 (de) | Vorrichtung zur verbrennungsunterstuetzung fuer einen oel- oder gasbrenner | |
DE1501657B1 (de) | Brennstoffbeheizter thermionischer Konverter | |
EP3287711A1 (fr) | Chauffage à air chaud | |
DE29602990U1 (de) | Wasserheizer | |
EP0164098A2 (fr) | Echangeur de chaleur | |
DE2107108A1 (de) | Gliederkessel mit einer im unteren Teil untergebrachten Brennkammer | |
EP0387584B1 (fr) | Tuyau de tirage pour gaz de chauffage | |
AT396981B (de) | Lamellenwärmetauscher | |
DE2324649C2 (de) | Wärmetauscher für motorunabhängige Heizungen in Kraftfahrzeugen | |
DE1152715B (de) | Waermeaustauscher mit jeweils einen Stroemungskanal begrenzenden, radial durch Stirnleisten im Abstand gehaltenen Blechen | |
DE2118201C3 (de) | Konvektorheizkörper | |
DE3700443A1 (de) | Waermetauscher fuer heizkessel, insbesondere fuer brennwertkessel | |
DE9310646U1 (de) | Vorrichtung zur Beheizung von Räumen | |
WO2010136463A2 (fr) | Collecteur solaire | |
DE1613759C3 (de) | Kühlvorrichtung für Transformatoren | |
DE3730566A1 (de) | Heizkessel | |
DE69003657T2 (de) | Wärmetauscheinheit für Lufterhitzer. | |
AT390140B (de) | Stahlheizkessel |
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): BE CH DE FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19871113 |
|
17Q | First examination report despatched |
Effective date: 19880829 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE FR GB IT LI NL SE |
|
REF | Corresponds to: |
Ref document number: 3576193 Country of ref document: DE Date of ref document: 19900405 |
|
ET | Fr: translation filed | ||
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: RENDAMAX B.V. |
|
ITF | It: translation for a ep patent filed |
Owner name: BUGNION S.P.A. |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: RENDAMAX B.V. |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19901114 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19901123 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19901127 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19901203 Year of fee payment: 6 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
|
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: 19901231 Year of fee payment: 6 |
|
26 | Opposition filed |
Opponent name: JOH. VAILLANT GMBH U. CO Effective date: 19901127 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19910204 Year of fee payment: 6 |
|
R26 | Opposition filed (corrected) |
Opponent name: JOH. VAILLANT GMBH U. CO Effective date: 19901127 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19910227 Year of fee payment: 6 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: JOH. VAILLANT GMBH U. CO. |
|
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: 19911217 |
|
GBPR | Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state | ||
BERE | Be: lapsed |
Owner name: RENDAMAX B.V. Effective date: 19911231 |
|
NLR2 | Nl: decision of opposition | ||
EUG | Se: european patent has lapsed |
Ref document number: 85115685.1 Effective date: 19920506 |