EP0834703A1 - Four à vapeur et convexion forcée - Google Patents
Four à vapeur et convexion forcée Download PDFInfo
- Publication number
- EP0834703A1 EP0834703A1 EP97420184A EP97420184A EP0834703A1 EP 0834703 A1 EP0834703 A1 EP 0834703A1 EP 97420184 A EP97420184 A EP 97420184A EP 97420184 A EP97420184 A EP 97420184A EP 0834703 A1 EP0834703 A1 EP 0834703A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- pipe
- oven
- tank
- inlet pipe
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000002123 temporal effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 235000021183 entrée Nutrition 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- F24C15/00—Details
- F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
- F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
Definitions
- the present invention relates to steam and convection ovens forced, in which a cooking chamber contains a turbine making circulate air by passing it over heating elements downstream of the turbine, with a device for generating steam to produce the steam introduced into the cooking chamber.
- Document DE 41 31 748 A describes a steam and convection oven forced in which steam production is carried out by spraying water on the heating elements.
- EP 0 383 366 also describes a steam oven and forced convection.
- the document expresses the problem of obtaining a regular and constant spraying. Previous solutions mentioned consist of injecting water under great pressure.
- the solution taught by this document consists in providing a regulator, inserted upstream in the water supply pipe, and that is adjusted so that the water flows without pressure at the outlet of the pipe, above the hub turbine. To do this, the regulator must be adjusted according to the water pressure upstream of the regulator. We see that such a solution does not ensure sufficient regularity of steam production in the oven.
- the present invention results from the observation that malfunctions result from variations in pressure water supply, producing too large variations in flow water sprayed onto the heating elements. Too much of water leads to a flow of non-vaporized water. Too low flow of water leads to insufficient steam.
- the problem proposed by the present invention is to design a steam oven and forced convection in which the production of steam is satisfactorily controlled, whatever the conditions water supply, including water pressure conditions in the water supply source, so as to create conditions constant and satisfactory spraying and spraying of water.
- the invention provides a steam oven and forced convection, including an enclosure air circulation turbine with heating elements downstream of the air circulation turbine, an inlet pipe to conduct water from a water supply source to an outlet arranged in the enclosure to direct a jet of water on a means of spray which projects the sprayed water onto the turbine fins air circulation, the oven further comprising a device for regulation of water flow interposed in the inlet pipe, producing a water flow independent of the water pressure in the source water supply at the entrance to the inlet pipe.
- Such a structure of a water flow control device is particularly advantageous, simple and inexpensive to manufacture, reliable, and efficient.
- the overflow pipe leads to excess of water in a water evacuation pipe from the oven enclosure.
- a regulation device water flow which further includes a balancing pipe of pressure, comprising an upstream siphon part communicating with the area bottom of the tank, and connected downstream to an outlet pipe steam from the oven.
- a balancing pipe of pressure comprising an upstream siphon part communicating with the area bottom of the tank, and connected downstream to an outlet pipe steam from the oven.
- the means of spraying is a drilled cone, mounted axially at the end of the turbine rotation.
- the turbine includes a flange perpendicular to its rotation shaft and carrying fins projecting from the face front of the flange, the spray cone being fixed in the center of the anterior face of the flange with its apex directed towards the flange, the inlet pipe outlet orifice directing the water radially on the side surface of the spray cone.
- the oven comprises an enclosure 1 limited by a muffle 2, the opening 3 of which is closed by a door 4.
- An air circulation turbine 5 is placed in the enclosure 1 in the vicinity of the rear wall 6 of the muffle 2.
- the turbine air circulation 5 shown in the figure comprises a flange 7, generally parallel to the rear wall 6 and mounted at the end of a rotation shaft 8 itself rotated by an electric motor 9.
- the flange 7 carries fins 10 projecting from the front face 11 flange 7.
- a spray cone 12 is attached to the center of the face anterior 11 of the flange 7, with its apex directed towards the flange 7.
- the spray cone 12 is drilled with holes such as hole 13, and is mounted axially at the end of the rotation shaft 8 of the turbine 5.
- An inlet pipe 14 makes it possible to conduct water from a water supply source 15, such as the supply network public in drinking water, up to an outlet orifice 16 disposed in enclosure 1 and adapted to direct a jet of water radially onto the lateral surface of the spray cone 12.
- a water supply source 15 such as the supply network public in drinking water
- Spray cone I2 projects water onto the fins 10 of the air circulation turbine 5 which itself projects the water onto heating elements 17 such as electrical resistors placed in periphery of turbine 5, that is to say downstream of turbine 5 in the air flow direction.
- the invention provides incorporate a water flow control device 18, producing a water flow independent of water pressure in the supply source of water 15 at the inlet of the inlet pipe 14.
- the water flow control device 18 comprises a sealed tank 19, disposed at a level higher than that of the orifice output 16.
- An upstream section 20 of inlet pipe 14 is provided with a solenoid valve 21 controlled by a timed control 22 ensuring intermittent opening of the solenoid valve 21 according to a determined cycle.
- the upstream section 20 of inlet pipe 14 is connected upstream to the water supply source 15, and is connected downstream to the tank waterproof 19.
- a downstream section 23 of inlet pipe 14 is suitable for conduct the water from the tank 19 to the outlet 16.
- An overflow pipe 24 is adapted to drain the water contained in the tank 19 beyond a determined maximum level 25.
- the overflow pipe 24 leads the excess water into a water evacuation pipe 26 ensuring the evacuation of the condensation water from a lower orifice 27 formed in the bottom wall 28 of the muffle 2.
- the overflow line 24 descends from the tank 19, and its inlet orifice is located at the maximum level determined 25.
- a tubular inlet portion of the overflow pipe 24 enters tank 19 through an orifice from its bottom wall, up to level 25.
- the water evacuation pipe 26 can, for example, conduct the condensing water to a condensing box 29 of which outlet 30 is connected to the waste water discharge pipes, preferably by a siphon.
- a steam outlet pipe 31 is connected to enclosure 1 by an upper orifice 32 formed in the upper wall 33 of the muffle 2.
- the steam outlet pipe 31 is provided with a catalyst 34 and its downstream outlet 35 is connected to the box condensation 29.
- a vent pipe 36 is connected at upper part of tank 19.
- the vent pipe 36 can advantageously comprise a valve 136, arranged so as to allow the outlet of the gases towards the atmosphere but preventing the exit of water to the outside of the tank 19.
- vent pipe free 36 may include a calibrated leak, allowing opening calibrated vent line 36.
- the downstream section 23 of inlet pipe 14 can advantageously comprise a device for calibrating water flow 37, placed at the outlet of the tank 19.
- the water flow control device 18 further comprises a pressure equalization pipe 38, comprising an upstream part 39 in a siphon communicating with the lower zone of the tank 19, and connected downstream to the steam outlet pipe 31 of the oven, preferably downstream of catalyst 34.
- the timed command 22 can advantageously be adjusted to ensure intermittent opening of the solenoid valve 21 according to a cycle ensuring a continuous presence of water in the tank 19, and a Intermittent flow of water in the overflow pipe 24. thus produces a continuous projection of water through the outlet orifice 16 onto the projection cone 12, and a regular production of steam at inside the enclosure 1.
- FIG. 1 illustrates the operation of the water flow control 18.
- Curve a illustrates the temporal variation of the water flow supply in the upstream section 20 of the inlet pipe, with a constant flow D between times t1 and t2, corresponding to the state open of the solenoid valve 21, and a zero flow between times t2 and t3 corresponding to the closed state of the solenoid valve 21.
- Curve b) illustrates the temporal variation of the water level in tank 19. From a minimum level m not zero at time t1, the level increases to the determined maximum 25 reached at time t4 prior to t2, then remains constant until t2 then decreases regularly until the minimum at time t3.
- Curve c) illustrates the temporal variation of the water flow in the overflow pipe 24.
- a water flow is present between instants t4 and t2.
- Curve d illustrates the constant water flow d in the section downstream 23 of inlet pipe 14.
Abstract
Description
- un réservoir étanche, disposé à un niveau supérieur à celui de l'orifice de sortie,
- un tronçon amont de canalisation d'entrée, muni d'une électrovanne pilotée par une commande temporisée assurant l'ouverture intermittente de l'électrovanne selon un cycle déterminé, raccordé en amont à la source d'alimentation d'eau, et raccordé en aval au réservoir étanche,
- un tronçon aval de canalisation d'entrée, adapté pour conduire l'eau depuis le réservoir jusqu'à l'orifice de sortie,
- une canalisation de mise à l'air libre, raccordée en partie supérieure du réservoir, et comportant de préférence un clapet s'opposant à la sortie de l'eau,
- une canalisation de trop-plein, adaptée pour évacuer l'eau contenue dans le réservoir au-delà d'un niveau maximum déterminé.
- la figure 1 représente, en vue de côté en coupe, un four selon un mode de réalisation particulier de la présente invention ; et
- la figure 2 illustre les diagrammes temporels de variation de débit et de niveau d'eau dans un dispositif de régulation de débit d'eau du four de la figure 1.
Claims (10)
- Four à vapeur et convexion forcée, comprenant une enceinte (1) à turbine de circulation d'air (5) avec des éléments chauffants (17) en aval de la turbine de circulation d'air (5), une canalisation d'entrée (14) pour conduire de l'eau depuis une source d'alimentation d'eau (15) jusqu'à un orifice de sortie (16) disposé dans l'enceinte (1) pour diriger un jet d'eau sur un moyen de pulvérisation (12) qui projette l'eau pulvérisée sur les ailettes (10) de la turbine de circulation d'air (5), caractérisé en ce qu'il comprend en outre un dispositif de régulation de débit d'eau (18) interposé dans la canalisation d'entrée (14), produisant un débit d'eau indépendant de la pression d'eau dans la source d'alimentation d'eau (15) à l'entrée de la canalisation d'entrée (14).
- Four selon la revendication 1, caractérisé en ce que le dispositif de régulation de débit d'eau (18) comprend :un réservoir étanche (19), disposé à un niveau supérieur à celui de l'orifice de sortie (16),un tronçon amont (20) de canalisation d'entrée (14), muni d'une électrovanne (21) pilotée par une commande temporisée (22) assurant l'ouverture intermittente de l'électrovanne (21) selon un cycle déterminé, raccordé en amont à la source d'alimentation d'eau (15), et raccordé en aval au réservoir étanche (19),un tronçon aval (23) de canalisation d'entrée (14), adapté pour conduire l'eau depuis le réservoir (19) jusqu'à l'orifice de sortie (16),une canalisation de mise à l'air libre (36), raccordée en partie supérieure du réservoir (19),une canalisation de trop-plein (24), adaptée pour évacuer l'eau contenue dans le réservoir (19) au-delà d'un niveau maximum déterminé (25).
- Four selon la revendication 2, caractérisé en ce que la canalisation de trop-plein (24) conduit l'excès d'eau dans une canalisation d'évacuation d'eau (26) de l'enceinte (1) du four.
- Four selon l'une des revendications 2 ou 3, caractérisé en ce que le tronçon aval (23) de canalisation d'entrée (14) comprend un dispositif de calibrage de débit d'eau (37) placé en sortie du réservoir (19).
- Four selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le dispositif de régulation de débit d'eau (18) comprend en outre une canalisation d'équilibrage de pression (38), comportant une partie amont (39) en siphon communiquant avec la zone inférieure du réservoir (19), et raccordée en aval à une canalisation de sortie de vapeur (31) du four.
- Four selon la revendication 5, caractérisé en ce que la canalisation de sortie de vapeur (31) du four est munie d'un catalyseur (34), et la canalisation d'équilibrage de pression (38) est raccordée à la canalisation de sortie de vapeur (31) du four en aval du catalyseur (34).
- Four selon l'une quelconque des revendications 2 à 6, caractérisé en ce que la canalisation de mise à l'air libre (36) comprend un clapet (136) permettant la sortie des gaz vers l'atmosphère mais interdisant la sortie d'eau vers l'extérieur du réservoir (19)
- Four selon l'une quelconque des revendications 2 à 7, caractérisé en ce que la canalisation de mise à l'air libre (36) comprend une fuite calibrée.
- Four selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le moyen de pulvérisation (12) est un cône percé, monté axialement en bout d'arbre de rotation (8) de la turbine (5).
- Four selon la revendication 9, caractérisé en ce que la turbine (5) comprend un flasque (7) perpendiculaire à son arbre de rotation (8) et portant des ailettes (10) en saillie sur la face antérieure (11) du flasque (7), le cône de pulvérisation (12) étant fixé au centre de la face antérieure (11) du flasque (7) avec son sommet dirigé vers le flasque (7), l'orifice de sortie (16) de canalisation d'entrée (14) dirigeant l'eau radialement sur la surface latérale du cône de pulvérisation (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9612471A FR2754334B1 (fr) | 1996-10-07 | 1996-10-07 | Four a vapeur et convexion forcee |
FR9612471 | 1996-10-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0834703A1 true EP0834703A1 (fr) | 1998-04-08 |
EP0834703B1 EP0834703B1 (fr) | 2004-03-31 |
Family
ID=9496608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97420184A Expired - Lifetime EP0834703B1 (fr) | 1996-10-07 | 1997-10-03 | Four à vapeur et convexion forcée |
Country Status (5)
Country | Link |
---|---|
US (1) | US5768982A (fr) |
EP (1) | EP0834703B1 (fr) |
AT (1) | ATE263342T1 (fr) |
DE (1) | DE69728342T2 (fr) |
FR (1) | FR2754334B1 (fr) |
Cited By (3)
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CN102389258A (zh) * | 2011-10-28 | 2012-03-28 | 九阳股份有限公司 | 电蒸炉产生过热蒸汽的控制方法 |
ITPD20130283A1 (it) * | 2013-10-16 | 2015-04-17 | Piron S R L | Dispositivo nebulizzatore d'acqua, particolarmente per forni di cottura per alimenti del tipo a ricircolazione forzata d'aria, e forno di cottura per alimenti dotato di un simile dispositivo nebulizzatore |
EP1662205A4 (fr) * | 2003-07-31 | 2015-10-14 | Sharp Kk | Cuiseur a vapeur |
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FR2775760B1 (fr) * | 1998-03-09 | 2000-05-05 | Bourgeois Prod Coop | Four a vapeur a repartiteur fixe de l'eau a vaporiser |
DE29814715U1 (de) * | 1998-08-17 | 1999-02-18 | Kulbach Egon | Kombiniertes Heißluft-Dampf-Gargerät |
US6188045B1 (en) | 2000-04-03 | 2001-02-13 | Alto-Shaam, Inc. | Combination oven with three-stage water atomizer |
DE10017966C2 (de) * | 2000-04-12 | 2003-12-04 | Rational Ag | Vorrichtung und Verfahren zur Reinigung eines Gargeräteinnenraumes |
JP3701839B2 (ja) * | 2000-04-20 | 2005-10-05 | 株式会社フジマック | 強制対流式オーブンの排水口構造 |
DE10043771C2 (de) * | 2000-07-03 | 2003-07-17 | Rational Ag | Gargerät mit Wassermengenregistrierung |
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ES2204822T3 (es) * | 2001-02-28 | 2004-05-01 | Angelo Po Grandi Cucine S.P.A. | Camara de coccion que tiene un dispositivo para la deshumidificacion en un aparato para coccion de alimentos. |
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DE10158425C1 (de) * | 2001-11-29 | 2003-09-11 | Neubauer Kurt Maschf | Gargerät mit Gebläse und Wasserzufuhr |
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FR2839546B1 (fr) * | 2002-05-07 | 2006-09-22 | Premark Feg Llc | Four pour la cuisson d'aliments |
FR2849164B1 (fr) * | 2002-12-23 | 2005-10-21 | Premark Feg Llc | Four pour la cuisson d'aliments |
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US20040187700A1 (en) * | 2003-06-09 | 2004-09-30 | Tippmann Robert T. | Method and apparatus for accelerating steam in a steam oven |
EP1669676B1 (fr) * | 2003-08-04 | 2017-03-22 | Fujimak Corporation | Four a vapeur |
US20050076901A1 (en) * | 2003-08-20 | 2005-04-14 | Timothy Metcalf | Handle rack |
US20060185661A1 (en) | 2005-02-23 | 2006-08-24 | Timothy Metcalf | Slide rack |
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KR20060006472A (ko) * | 2004-07-16 | 2006-01-19 | 삼성전자주식회사 | 가열조리장치 |
US20060112947A1 (en) * | 2004-11-29 | 2006-06-01 | Atul Saksena | Steam cooker with moving steam delivery member |
EP1684018A1 (fr) * | 2004-12-30 | 2006-07-26 | Filippi S.r.l. | Four à la vapeur avec un filtre accessible pour la pierre à chaux et un réservoir pour l'eau chargé avec un traite étanche |
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US8207477B2 (en) * | 2007-11-26 | 2012-06-26 | Whirlpool Corporation | Method for cooking vegetables using steam |
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AU2016204889B2 (en) * | 2008-01-28 | 2017-11-16 | Duke Manufacturing Co. | Convection oven |
CN103329951A (zh) | 2008-01-28 | 2013-10-02 | 杜克制造公司 | 对流式炉 |
US9066523B2 (en) * | 2009-01-19 | 2015-06-30 | Accutemp Products, Inc. | Method and apparatus for directing steam distribution in a steam cooker |
EP2476293B1 (fr) * | 2009-09-11 | 2017-11-08 | Enodis Corporation | Four à micro-ondes à impact comprenant une fonction vapeur |
IT1396249B1 (it) * | 2009-10-13 | 2012-11-16 | Giorik Spa | Procedimento combinato per la produzione di vapore in un forno di cottura a vapore per alimenti, e forno di cottura che realizza tale procedimento. |
US8783243B2 (en) | 2010-10-25 | 2014-07-22 | General Electric Company | Lockout system for surface burners of a cooking appliance |
FR3016812B1 (fr) * | 2014-01-29 | 2020-10-23 | Steriflow | Systeme de traitement thermique d'articles |
KR102226003B1 (ko) * | 2014-09-02 | 2021-03-10 | 삼성전자주식회사 | 조리기기 |
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US5530223A (en) * | 1993-08-05 | 1996-06-25 | Angelo Po Grandi Cucine S.P.A. | Convection and steam oven with a pre-atomizer |
FR2711229B1 (fr) * | 1993-10-12 | 1995-12-08 | Bourgeois Ste Coop Prod | Four à vapeur muni d'un dispositif d'évacuation de la vapeur. |
US5515773A (en) * | 1995-02-16 | 1996-05-14 | The Rival Company | Steam oven |
-
1996
- 1996-10-07 FR FR9612471A patent/FR2754334B1/fr not_active Expired - Fee Related
-
1997
- 1997-10-03 AT AT97420184T patent/ATE263342T1/de not_active IP Right Cessation
- 1997-10-03 EP EP97420184A patent/EP0834703B1/fr not_active Expired - Lifetime
- 1997-10-03 DE DE69728342T patent/DE69728342T2/de not_active Expired - Lifetime
- 1997-10-07 US US08/946,090 patent/US5768982A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2747097A1 (de) * | 1977-10-20 | 1979-05-03 | Buderus Ag | Geraet zur waermebehandlung von lebensmitteln und speisen |
EP0383366A1 (fr) * | 1986-02-19 | 1990-08-22 | Eloma GmbH Bedarfsartikel zur Gemeinschaftsverpflegung | Procédé pour cuire des aliments à la vapeur |
DE3909283A1 (de) * | 1989-03-21 | 1990-10-18 | Eloma Gmbh | Dampfgargeraet |
EP0455890A1 (fr) * | 1990-04-27 | 1991-11-13 | ELOMA GmbH BEDARFSARTIKEL ZUR GEMEINSCHAFTSVERPFLEGUNG | Appareil de cuisson À vapeur et procédé pour cuire à la vapeur |
EP0523489A1 (fr) * | 1991-07-17 | 1993-01-20 | ZANUSSI GRANDI IMPIANTI S.p.A. | Arrangement de générateur de vapeur pour appareils de cuisson d'aliments, en particulier fours et appareils similaires |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1662205A4 (fr) * | 2003-07-31 | 2015-10-14 | Sharp Kk | Cuiseur a vapeur |
CN102389258A (zh) * | 2011-10-28 | 2012-03-28 | 九阳股份有限公司 | 电蒸炉产生过热蒸汽的控制方法 |
CN102389258B (zh) * | 2011-10-28 | 2013-12-18 | 九阳股份有限公司 | 电蒸炉产生过热蒸汽的控制方法 |
ITPD20130283A1 (it) * | 2013-10-16 | 2015-04-17 | Piron S R L | Dispositivo nebulizzatore d'acqua, particolarmente per forni di cottura per alimenti del tipo a ricircolazione forzata d'aria, e forno di cottura per alimenti dotato di un simile dispositivo nebulizzatore |
Also Published As
Publication number | Publication date |
---|---|
FR2754334B1 (fr) | 1998-12-18 |
FR2754334A1 (fr) | 1998-04-10 |
DE69728342D1 (de) | 2004-05-06 |
EP0834703B1 (fr) | 2004-03-31 |
US5768982A (en) | 1998-06-23 |
DE69728342T2 (de) | 2004-12-30 |
ATE263342T1 (de) | 2004-04-15 |
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