EP1809946B1 - Verbessertes gasbrennersystem zum kochen von lebensmitteln - Google Patents

Verbessertes gasbrennersystem zum kochen von lebensmitteln Download PDF

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Publication number
EP1809946B1
EP1809946B1 EP05805769.6A EP05805769A EP1809946B1 EP 1809946 B1 EP1809946 B1 EP 1809946B1 EP 05805769 A EP05805769 A EP 05805769A EP 1809946 B1 EP1809946 B1 EP 1809946B1
Authority
EP
European Patent Office
Prior art keywords
cap
burner system
gas burner
gas
inclination
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.)
Not-in-force
Application number
EP05805769.6A
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English (en)
French (fr)
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EP1809946A1 (de
Inventor
Walter Falcioni
Tiziano Lacche'
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Whirlpool EMEA SpA
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Whirlpool EMEA SpA
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Publication of EP1809946A1 publication Critical patent/EP1809946A1/de
Application granted granted Critical
Publication of EP1809946B1 publication Critical patent/EP1809946B1/de
Not-in-force legal-status Critical Current
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

Definitions

  • the present invention relates to a gas burner system for food cooking according to the preamble of claim 1.
  • burner systems which comprise two concentric burners, generally an outer one and an inner one, having a substantially circular shape.
  • the two burners are fed by independent control valves, so that they can be used together or separately in order to achieve good variability and a homogeneous distribution of the heat to be supplied to the cooking containers.
  • the Patent IT1232887 in the name of the same Applicant describes a gas burner system comprising two concentric burners in which gas is mixed with primary air above the cooking top on which the burner system is mounted and through ducts operating as a Venturi tube.
  • a gas burner system comprising two concentric burners in which gas is mixed with primary air above the cooking top on which the burner system is mounted and through ducts operating as a Venturi tube.
  • wedge-shaped profiles are obtained on the lower surface of the caps covering the outer burners; however, such wedge-shaped profiles have the drawback of requiring caps having a complex construction as well as an excessive and undesired height.
  • the International Patent Application No. WO2004/044490 by Sabaf which is to be considered the closest prior art, describes a gas burner system for food cooking comprising a central burner having a first flame crown and at least one outer burner being concentric to the central burner.
  • the air-gas mixture is supplied separately to the burners, in that there is a horizontal chamber providing a radial Venturi effect for mixing primary air and gas.
  • an additional metal element which is secured to the upper surface of the outer burner by means of screws.
  • another additional metal element is secured to the lower surface of the cap of the central burner.
  • the present invention aims at solving the above-mentioned drawbacks by providing a gas burner system for food cooking having an improved and different construction with respect to any known solutions.
  • the main object of the present invention is to provide a gas burner system for food cooking being fitted with economical and effective means allowing for a uniform outlet of the air-gas mixture through the apertures for the formation and propagation of the flame of the concentric burners.
  • Another object of the present invention is to provide a gas burner system for food cooking which offers very good performance by using caps having a simple construction and a reduced height. Such objects are achieved by the gas burner system for food cooking having the features described in the independent claim 1; advantageous aspects of the present invention are detailed in dependent claims.
  • Fig. 1 shows a gas burner system for food cooking, indicated as a whole with reference number 1, comprising a gas supply cup 2 on which an outer burner 3 is placed.
  • the outer burner 3 consists of two half-crowns 3a and 3b, which are separated from each other by a substantially elliptical space; an inner burner 4 is located within said space and on the cup 2.
  • the outer burner 3 is made up of the two half-crowns 3a and 3b, which are separated from each other in order to ensure a proper supply of secondary air to the inner burner 4.
  • a pair of spark plugs C1 and C2 and a pair of thermocouples T1 and T2 are located on the cup 2; in particular, according to the embodiment of Fig. 1 , the spark plug C1 and the thermocouple T1 are associated with the outer burner 3, whereas the spark plug C2 and the thermocouple T2 are associated with the inner burner 4.
  • said outer burner 3 and inner burner 4 On the outer perimeter of their upper edge, said outer burner 3 and inner burner 4 have main apertures 5 for the outlet and ignition of the gas necessary for forming a flame adapted to heat a cooking container (not illustrated).
  • Reference number 6 indicates secondary apertures being smaller than the main apertures 5 and being preferably located between two main apertures 5; the secondary apertures 6 ensure the propagation of the flame during the ignition of the outer burner 3 and inner burner 4, and allow the flame to stabilize.
  • a first cap 7 is positioned on top of the outer burner 3, whereas a second cap 8 is positioned on top of the inner burner 4, the shape and dimensions of said caps 7 and 8 almost matching those of said outer burner 3 and inner burner 4.
  • the first cap 7 is preferably made of one piece and is adapted to be positioned onto the two half-crowns 3a and 3b which make up the outer burner 3.
  • the cup 2 comprises two outer chambers 9 and 10 as well as an inner chamber 11; two nozzles 12 and 13, being connected to a gas supply duct 14, allow the gas to flow into the outer chambers 9 and 10, respectively.
  • a nozzle 15 is connected to a duct (not illustrated) being independent from the duct 14 and allows the gas to flow into the inner chamber 11.
  • the gas flowing into the outer chambers 9 and 10 supplies the outer burner 3, whereas the gas flowing into the inner chamber 11 supplies the inner burner 4; the gas supply for the outer burner 3 therefore takes place independently of that for the inner burner 4.
  • the primary air is taken above a cooking top 16 on which the burner system 1 is mounted, in particular through passages 17 obtained between the cup 2 and the half-crowns 3a and 3b.
  • the half-crowns 3a and 3b and the inner burner 4 are connected to one another at the bottom through a channel 18 which runs alongside the passages 17 and ducts 19, 20, 21, which operate as a Venturi tube.
  • the channel 18 allows to channel the primary air entering from the passages 17 and to convey it toward the ducts 19, 20, 21, so that it can be mixed inside said ducts 19, 20, 21 with the gas flowing into the outer chambers 9 and 10 and into the inner chamber 11 of the cup 2.
  • the air-gas mixture is prepared within the ducts 19, 20, 21 and rises therein until it reaches the upper end of said ducts, i.e. the holes 19', 20' and 21' (shown in Fig. 1 ).
  • Fig. 4 shows a sectional view of the caps 7 and 8.
  • the first cap 7 has an inner edge B abutting on the inner edge of the half-crowns 3a and 3b, and an outer edge B1 being located substantially on the apertures 5 and 6 of the half-crowns 3a and 3b;
  • the second cap 8 has an outer edge B2 being located substantially on the apertures 5 and 6 of the inner burner 4.
  • the first cap 7 has a lower surface 24 and an upper surface 25, whereas the second cap 8 has a lower surface 26 and an upper surface 27.
  • distal development will be used to indicate the direction which develops outward from the axis A of the burner system 1.
  • the lower surface 24 of the first cap 7 is, in its distal development, substantially inclined upward relative to the bearing plane of the first cap 7, i.e. the horizontal plane in this case.
  • Fig. 4 clearly shows that the inner edge B of the first cap 7 lies in a horizontal plane being lower than the bearing plane of the outer edge B1.
  • both the first cap 7 and the second cap 8 are provided with a central zone having a lower surface being substantially flat and substantially parallel to their bearing plane; said central zone is designated B3 for the first cap 7 and B4 for the second cap 8. Therefore, the lower surface 24, 26 of said caps 7, 8 is not inclined evenly along the entire distal development, though it has large zones being clearly inclined upward; one can then say that the lower surface 24, 26 of the caps 7, 8 is substantially inclined upward for its entire distal development.
  • the lower surface 26 of the second cap 8 is, in its distal development, substantially inclined upward relative to the horizontal or bearing plane of the second cap 8.
  • Said inclination of the lower surfaces 24 and 26 of the caps 7 and 8 allows to direct the flow of air-gas mixture coming from the ducts 19, 20, 21 upward, in particular toward the apertures 5 and 6 of the burners 3 and 4.
  • rises 22 and 23 are provided with an inclined surface being complementary to the inclined lower surface 24 of the first cap 7, and cooperate with said first cap 7 for the purpose of directing the air-gas mixture toward the apertures 5 and 6 of the half-crowns 3a and 3b.
  • the optimal angle of inclination of the lower surface of the outer edge B2 corresponds to an angle of inclination ⁇ ranging from 6 to 14 degrees relative to the horizontal or bearing plane of the second cap 8.
  • Said angles of inclination ⁇ and ⁇ of the lower surfaces of the outer edges B1 and B2 allow to direct upward both the flow of air-gas mixture, toward the apertures 5 and 6 of the burners 3 and 4, and the flames, which are properly directed toward a cooking container placed on the burner system.
  • the upper surface 25 of the first cap 7 As to the upper surface 25 of the first cap 7, it can be noticed in Fig. 4 that its inclination corresponds to that of the lower surface 24; as a matter of fact, the upper surface 25 is also, in its distal development, substantially inclined upward relative to the horizontal or bearing plane of said first cap 7.
  • Said inclination of the upper surface 25 allows to keep the first cap 7, in particular the inner edge B, at an appropriate distance from the apertures 5 and 6 of the inner burner 4, and consequently ensures an adequate operation of both the outer burner 3 and the inner burner 4, while keeping the height of the inner burner 4 low.
  • the fact that the lower surface of the caps is, in its distal development, substantially inclined upward relative to the horizontal or bearing plane of the cap allows to direct the flow of air-gas mixture upward, toward the apertures for the formation and propagation of the flame.
  • a further advantage of the present invention is that the lower surfaces of the edges of the caps are so inclined as to allow to direct upward both the flow of air-gas mixture, in particular toward the apertures for the formation and propagation of the flame, and the flames produced by the burners, so as to direct them properly toward a cooking container placed on the burner system.
  • the upper surface of the first cap being inclined upward in its distal development allows to keep the inner edge of the first cap at a proper distance from the apertures for the formation and propagation of the flame of the inner burner.
  • a further advantage of the present invention is given by the use of a structure which connects the burners at the bottom; such a structure allows to channel the primary air so that it can be mixed with the gas properly.
  • a further advantage of the gas burner system for food cooking according to the present invention is given by the fact that the number of components making up said burner system is lower than that required by the prior art; the remarkable advantages offered by this solution are therefore apparent both from an economical point of view and in terms of reliability of the entire burner system.
  • the first cap 7 may be manufactured in two pieces adapted to lie on the half-crowns 3a e 3b.
  • a further possible modification consists in using a cup for the outer burner 3 and another cup for the inner burner 4.
  • the two burners 3 and 4 may be fed through a single supply being controlled by a single tap.
  • Said variant may be implemented, for example, by closing the duct (not illustrated) which in the above-described solution of independently fed burners delivers gas into the chamber 11; in this case, the nozzle 15 is connected to the duct 14; in this way the gas flows, through the duct 14 and the respective nozzles 12, 13 and 15, both into the outer chambers 17 and 21 and into the inner chamber 11.
  • said connection may be obtained by simply drilling said closed duct in the area corresponding to the nozzle 15.
  • the present invention also relates to a gas cooking top for food comprising at least one burner and/or one burner system having one or more of the above-described features.

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

Claims (14)

  1. Gasbrennersystem (1) für Kochgeräte, umfassend ein Paar konzentrische Brenner (3, 4), wobei das Brennersystem (1) konfiguriert ist, so dass das dem Brennerpaar (3, 4) zuzuführende Gas in geeigneter Weise mit Luft vermischt wird, die von oberhalb des Kochfeldes (16) aufgenommen wird, auf dem das Brennersystem montiert ist (1), um ein Luft-Gasgemisch für das Brennerpaar (3, 4) auszubilden, wobei das Brennerpaar (3, 4) umfasst:
    - einen äußeren Brenner (3), welcher mit einer ersten Kappe (7) versehen ist, die eine untere Oberfläche (24) und eine obere Oberfläche (25) aufweist;
    - einen inneren Brenner (4), welcher mit einer zweiten Kappe (8) versehen ist, die eine untere Oberfläche (26) und eine obere Oberfläche (27) aufweist;
    wobei die untere Oberfläche (24) der ersten Kappe (7) in ihrer distalen Entwicklung relativ zur Lagerebene der Kappe (7) im Wesentlichen nach oben geneigt ist, so dass der Fluss von Luft-Gas-Gemisch nach oben gerichtet ist, in Richtung von Öffnungen (5, 6) an dem äußeren Umfang der Oberkante des äußeren Brenners (3) zur Bildung und Ausbreitung der Flamme.
    dadurch gekennzeichnet, dass
    die obere Oberfläche (25) der ersten Kappe (7) in ihrer distalen Entwicklung relativ zur Lagerebene der ersten Kappe (7) im Wesentlichen nach oben geneigt ist, wobei die Neigung der oberen Oberfläche (25) der ersten Kappe (7) der Neigung der unteren Oberfläche (24) der ersten Kappe (7) entspricht.
  2. Gasbrennersystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass die erste Kappe (7) eine innere Kante (B) aufweist, die in einer horizontalen Ebene liegt, die niedriger ist als die Lagerebene einer äußeren Kante (B1) der ersten Kappe (7).
  3. Gasbrennersystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der Kappen (7, 8) mit einer zentralen Zone (B3) versehen ist, deren untere Oberfläche im Wesentlichen flach und im Wesentlichen parallel zu der Lagerebene der Kappe (7, 8) ist.
  4. Gasbrennersystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der Kappen (7, 8) mit einer Außenkante (B1, B2) versehen ist, deren untere Oberfläche in ihrer distalen Entwicklung nach oben geneigt ist.
  5. Gasbrennersystem (1) nach Anspruch 4, dadurch gekennzeichnet, dass die erste Kappe (7) mit einer Außenkante (B1) versehen ist, deren untere Oberfläche in ihrer distalen Entwicklung nach oben geneigt ist, insbesondere unter einem Neigungswinkel (a) im Bereich von 4 bis 10 Grad relativ zur Lagerebene der ersten Kappe (7).
  6. Gasbrennersystem (1) nach Anspruch 4, dadurch gekennzeichnet, dass die zweite Kappe (8) mit einer Außenkante (B2) versehen ist, deren untere Oberfläche in ihrer distalen Entwicklung nach oben geneigt ist, insbesondere unter einem Neigungswinkel (a) im Bereich von 6 bis 14 Grad relativ zur Lagerebene der zweiten Kappe (8).
  7. Gasbrennersystem (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Neigung der Außenkante (B1) der ersten Kappe (7) geringer ist als die Neigung der Außenkante (B2) der zweiten Kappe (8).
  8. Gasbrennersystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass der äußere Brenner (3) zwei Halbkronen (3a, 3b) aufweist, die durch einen Raum voneinander getrennt sind, um die notwendige Zufuhr von Sekundärluft zum Innenbrenner (4) von oben über dem Kochfeld zu gewährleisten.
  9. Gasbrennersystem (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die erste Kappe (7) aus einem Stück gefertigt ist und eingerichtet ist, auf den Halbkronen (3a, 3b) positioniert zu werden.
  10. Gasbrennersystem (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Halbkronen (3a, 3b) Erhöhungen (22, 23) aufweisen, die mit einer geneigten Oberflächen versehen sind, die komplementär zu der geneigten unteren Oberfläche(24) der ersten Kappe ist (7).
  11. Gasbrennersystem (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Halbkronen (3a, 3b) und der Innenbrenner (4) durch einen Kanal (18) miteinander verbunden sind.
  12. Gasbrennersystem (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Kanal (18) es ermöglicht, die über einem Kochfeld (16) entnommene Primärluft durch Durchgänge (17) zu leiten, die zwischen einem Becher (2) und den genannten Halbkronen (3a, 3b) erhalten werden.
  13. Gasbrennersystem (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass sich der Kanal (18) neben den Durchgängen (17) und neben Leitungen (19, 20, 21) erstreckt, die als Venturirohr fungieren.
  14. Gasbrennersystem (1) nach einem der vorhergehenden Ansprüche, wobei das Brennersystem (1) eine unabhängige Gasversorgung zu den zwei Brennern (3, 4) bereitstellt.
EP05805769.6A 2004-11-12 2005-10-26 Verbessertes gasbrennersystem zum kochen von lebensmitteln Not-in-force EP1809946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000794A ITTO20040794A1 (it) 2004-11-12 2004-11-12 Sistema di bruciatori di gas per la cottura di alimenti di tipo perfezionato
PCT/IB2005/003188 WO2006051368A1 (en) 2004-11-12 2005-10-26 Improved gas burner system for food cooking

Publications (2)

Publication Number Publication Date
EP1809946A1 EP1809946A1 (de) 2007-07-25
EP1809946B1 true EP1809946B1 (de) 2019-02-20

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EP05805769.6A Not-in-force EP1809946B1 (de) 2004-11-12 2005-10-26 Verbessertes gasbrennersystem zum kochen von lebensmitteln

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EP (1) EP1809946B1 (de)
IT (1) ITTO20040794A1 (de)
RU (1) RU2387923C2 (de)
WO (1) WO2006051368A1 (de)

Cited By (1)

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CN112524611A (zh) * 2019-09-17 2021-03-19 宁波方太厨具有限公司 燃烧器火盖及应用该火盖的燃气灶具

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ITTO20070133A1 (it) * 2007-02-26 2008-08-27 Indesit Co Spa Sistema di bruciatori di gas per apparecchi di cottura per alimenti
ITTO20070644A1 (it) 2007-09-12 2009-03-13 Indesit Co Spa Metodo per regolare l apertura di una valvola per fluido edelettrodomestico di cottura a gas che lo utilizza
PL2236921T3 (pl) * 2009-03-18 2015-04-30 Electrolux Home Products Corp Nv Ulepszony palnik gazowy
CN102762922B (zh) * 2009-11-30 2015-02-04 伊莱克斯家用产品公司 附接到燃烧器的文火板
IT1400182B1 (it) * 2010-05-19 2013-05-17 Defendi Italy Srl Bruciatore a gas a più corone di fiamme.
CN102022730B (zh) * 2010-12-14 2012-04-25 李�泳 家用灶具燃烧器
CN102116476B (zh) * 2011-02-14 2013-02-13 杭州老板电器股份有限公司 一种高效节能环保型燃烧器
EP2551589A3 (de) * 2011-07-28 2017-12-13 Turas Gaz Armatürleri Sanayi. Ve Ticaret A.S. Gasbrenner mit mehreren Flammenringen
ITVE20130027A1 (it) * 2013-05-29 2014-11-30 Defendi Italy Srl Bruciatore a gas perfezionato.
DE102013218852A1 (de) * 2013-09-19 2015-03-19 E.G.O. Elektro-Gerätebau GmbH Anordnung von Gasbrennern
WO2016145744A1 (zh) * 2015-03-13 2016-09-22 广东美的厨房电器制造有限公司 燃烧器
IT202200008663A1 (it) * 2022-04-29 2023-10-29 Ego Elektro Geraetebau Gmbh Bruciatore a gas perfezionato

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US6332460B1 (en) * 1999-01-29 2001-12-25 Officine Meccaniche Defendi S.R.L. Gas burner particularly for incorporated cooking hobs of a gas cooker

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US6135764A (en) * 1998-04-09 2000-10-24 Kwiatek; David J. Ribbon port burner for gas range
FR2830075A1 (fr) * 2001-09-27 2003-03-28 Sourdillon Sa Bruleur a gaz pour appareil de cuisson
FR2837912B1 (fr) * 2002-03-29 2004-12-17 Sourdillon Sa Bruleur a gaz pour appareil de cuisson
HU227511B1 (hu) * 2002-11-12 2011-07-28 Sabaf Spa Gázégõ gáztûzhelyekhez
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FR1335280A (fr) * 1962-09-07 1963-08-16 Fargas S P A Brûleur perfectionné pour cuisinières à gaz
US6332460B1 (en) * 1999-01-29 2001-12-25 Officine Meccaniche Defendi S.R.L. Gas burner particularly for incorporated cooking hobs of a gas cooker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112524611A (zh) * 2019-09-17 2021-03-19 宁波方太厨具有限公司 燃烧器火盖及应用该火盖的燃气灶具
CN112524611B (zh) * 2019-09-17 2022-01-25 宁波方太厨具有限公司 燃烧器火盖及应用该火盖的燃气灶具

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Publication number Publication date
RU2007121661A (ru) 2008-12-20
ITTO20040794A1 (it) 2005-02-12
WO2006051368A1 (en) 2006-05-18
RU2387923C2 (ru) 2010-04-27
EP1809946A1 (de) 2007-07-25

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