EP0609502A1 - Process for making a metallic workpiece by a sintering method - Google Patents

Process for making a metallic workpiece by a sintering method Download PDF

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Publication number
EP0609502A1
EP0609502A1 EP93118315A EP93118315A EP0609502A1 EP 0609502 A1 EP0609502 A1 EP 0609502A1 EP 93118315 A EP93118315 A EP 93118315A EP 93118315 A EP93118315 A EP 93118315A EP 0609502 A1 EP0609502 A1 EP 0609502A1
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EP
European Patent Office
Prior art keywords
components
produced
sintering
enamel layer
production
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.)
Withdrawn
Application number
EP93118315A
Other languages
German (de)
French (fr)
Inventor
Manfred Dr. Weber
Friedhelm Schütter
Werner Gronnenberg
Kurt Gertler
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.)
Elektro- und Gas-Armaturen-Fabrik GmbH
Krebsoge Sinterholding GmbH
Original Assignee
Elektro- und Gas-Armaturen-Fabrik GmbH
Krebsoge Sinterholding GmbH
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
Application filed by Elektro- und Gas-Armaturen-Fabrik GmbH, Krebsoge Sinterholding GmbH filed Critical Elektro- und Gas-Armaturen-Fabrik GmbH
Publication of EP0609502A1 publication Critical patent/EP0609502A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • 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
    • 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
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/76—Protecting flame and burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • 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
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the invention relates to a method for producing metallic components by means of the sintering technique, in particular for producing components exposed to heat during use, such as covers for gas burners of domestic and commercial cookers or the like, and to a corresponding component.
  • the object of the invention is to provide a solution with which such components are easy to manufacture even with complex designs and offer an optical appearance which corresponds to today's requirements.
  • this object is achieved according to the invention in that a component produced by sintering is subsequently provided with an enamel layer at least in some areas.
  • a powder mixture with the base powder iron and alloy elements such as carbon, nickel, silicon oxide or silicates of the alkaline earth or alkali groups is recommended as the sintered material, the alloy additions expediently being below 5%.
  • the sintered components should have a weight of 5 to 8 g / cm3 and expediently have a residual porosity which is approximately 5 to 35% based on the theoretical density of iron.
  • the roughness of the surface structure before the application of the enamel layer can advantageously be 5 to 50 ⁇ .
  • the invention also provides components produced by the preceding method, these not being on the burner cap restrict, but here the invention is of particular value.
  • a burner generally designated 1 and partially sectioned in FIG. 1, has, in addition to the burner cover 2 in the foreground with an enamel coating 3, a burner stand 4 which passes through a gas trough designated 5, and further components.
  • the other components are, for example, a plug-in attachment 6, a burner ring 7 with the gas outlet channels 8 and, if appropriate, with additional gas outlet openings 9, but this is not important here.
  • the burner cover 2 can be designed to be very different, for example having a comparatively small inflow cone 10, as in the example in FIG. 1, a large inflow cone 10a in accordance with FIG. 2, or a smooth lower edge 10b, as in FIG. 3.
  • the lid 2c is equipped with an upwardly curved inner surface 10c.

Abstract

Mit einem Verfahren zur Erzeugung metallischer Bauteile mittels der Sintertechnik, insbesondere zur Erzeugung von während des Gebrauches Hitze ausgesetzter Bauteile, wie Deckel von Gasbrennern von Haushalts- und Wirtschaftsherden od. dgl., soll eine Lösung geschaffen werden, mit der derartige Bauteile auch bei aufwendigen Gestaltungen leicht herzustellen sind und ein optisches Erscheinungsbild bieten, welches den heutigen Anforderungen entspricht. Dies wird dadurch erreicht, daß ein durch Sintern hergestelltes Bauteil wenigstens bereichsweise nachfolgend mit einer Emailleschicht versehen wird. <IMAGE>With a method for the production of metallic components by means of the sintering technique, in particular for the production of components exposed to heat during use, such as covers of gas burners of household and commercial stoves or the like, a solution is to be created with which such components can also be used in complex designs are easy to manufacture and offer an optical appearance that meets today's requirements. This is achieved in that a component produced by sintering is subsequently provided with an enamel layer at least in some areas. <IMAGE>

Description

Die Erfindung richtet sich auf ein Verfahren zur Erzeugung metallischer Bauteile mittels der Sintertechnik, insbesondere zur Erzeugung von während des Gebrauches Hitze ausgesetzter Bauteile, wie Deckel von Gasbrennern von Haushalts- und Wirtschaftsherden od. dgl., sowie auf ein entsprechendes Bauteil.The invention relates to a method for producing metallic components by means of the sintering technique, in particular for producing components exposed to heat during use, such as covers for gas burners of domestic and commercial cookers or the like, and to a corresponding component.

Bei Gasbrennern ist es bekannt, die Brennerdeckel aus Stahl, Stahlguß, Aluminium oder Messing herzustellen, wobei mehrere Arbeitsschritte notwendig sind. Da derartige Brennerdeckel bei einem Gasherd optisch ganz wesentlich hervortreten, ist man bemüht, die Brennerdeckel sehr glatt zu gestalten, was auch deren Reinigung vereinfacht. Heute besteht immer mehr das Bedürfnis, Brenner im Brenn- bzw. Emmissionsverhalten von Schadstoffen zu optimieren, was zu zum Teil sehr aufwendigen Gestaltungen der einzelnen Brennerelemente, wie Deckel, Brennerring u. dgl., führt.In the case of gas burners, it is known to produce the burner cover from steel, cast steel, aluminum or brass, several steps being necessary. Since such burner caps appear very visually in a gas stove, efforts are made to make the burner caps very smooth, which also simplifies their cleaning. Today there is an increasing need to optimize the burner in terms of the burning or emission behavior of pollutants, which in some cases is very complex for the individual burner elements, such as the lid, burner ring and the like. Like., leads.

Aufgabe der Erfindung ist die Schaffung einer Lösung, mit der derartige Bauteile auch bei aufwendigen Gestaltungen leicht herzustellen sind und ein optisches Erscheinungsbild bieten, welches den heutigen Anforderungen entspricht.The object of the invention is to provide a solution with which such components are easy to manufacture even with complex designs and offer an optical appearance which corresponds to today's requirements.

Mit einem Verfahren der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß ein durch Sintern hergestelltes Bauteil wenigstens bereichsweise nachfolgend mit einer Emailleschicht versehen wird.With a method of the type described in the introduction, this object is achieved according to the invention in that a component produced by sintering is subsequently provided with an enamel layer at least in some areas.

Das Emaillieren metallischer Oberflächen ist z.B. aus dem Nachschlagewerk "ABC Technik und Naturwissenschaft", Bd. 1 (A-K), Verlag Harri Deutsch, Seite 244, bekannt. Darüber hinaus ist aus der US-Z Advanced Materials & Processes, Feb. 1992, Seiten 58, 59, das Flammspritzen oxidischer Beschichtungen auf Oberflächen bekannt. Eine andere Art des Oberflächenschutzes, z.B. durch mehrstündiges Erwärmen auf 300°C beschreibt die DE-Z Chemie-Ing.-Techn., 45, Feb. 1973, Seiten 209, 210.The enamelling of metallic surfaces is e.g. from the reference work "ABC Technik und Naturwissenschaft", Vol. 1 (A-K), Verlag Harri Deutsch, page 244. In addition, from US-Z Advanced Materials & Processes, Feb. 1992, pages 58, 59, the flame spraying of oxidic coatings on surfaces is known. Another type of surface protection, e.g. DE-Z Chemie-Ing.-Techn., 45, Feb. 1973, pages 209, 210 describes heating for several hours at 300 ° C.

Durch die Kombination zweier für sich gesehen bekannter Techniken, nämlich der Sintertechnik einerseits und der Emailliertechnik andererseits, ist es möglich, auch aufwendig gestaltete metallische Bauteile pulvermetallurgisch kostengünstig herzustellen, die nachfolgend lediglich eines Emaillierungsschrittes bedürfen, um zum endgültig fertigen Produkt zu kommen. Die bekannten Gestaltungsarten benötigen in der Regel eine Mehrzahl von Herstellungsschritten, was nicht nur zur Verteuerung der Elemente führt, sondern häufig auch zu deren nur beschränkter Einsatzfähigkeit.By combining two techniques that are known per se, namely sintering technology on the one hand and enamelling technology on the other hand, it is possible to produce metal components that are elaborately designed in a powder metallurgical manner, which subsequently only require an enamelling step in order to arrive at the finally finished product. The known types of design generally require a plurality of manufacturing steps, which not only leads to an increase in the cost of the elements, but often also to their limited usability.

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen:
Zweckmäßig kann es z.B. sein, vor der Aufbringung einer Emailleschicht einen zusätzlichen Glühvorgang vorzusehen, ohne daß am gesinterten Bauteil etwa durch spanabnehmende Bearbeitung etwas geändert werden müßte.Further embodiments of the invention result from the subclaims:
For example, it may be expedient to provide an additional annealing process before applying an enamel layer, without the sintered component having to be changed, for example by machining.

Als Sintermaterial empfiehlt sich ein Pulvergemisch mit dem Basispulver Eisen und Legierungselementen, wie Kohlenstoff, Nickel, Siliciumoxid oder Silikaten der Erdalkali- oder Alkaligruppen, wobei die Legierungszusätze zweckmäßig unter 5 % liegen.A powder mixture with the base powder iron and alloy elements such as carbon, nickel, silicon oxide or silicates of the alkaline earth or alkali groups is recommended as the sintered material, the alloy additions expediently being below 5%.

Um die Aufbringung einer Emailleschicht zu vereinfachen, sollten die gesinterten Bauteile von 5 bis 8 g/cm³ aufweisen, zweckmäßig eine Restporösität haben, die bei ca. 5 bis 35 % bezogen auf die theoretische Dichte von Eisen liegt.In order to simplify the application of an enamel layer, the sintered components should have a weight of 5 to 8 g / cm³ and expediently have a residual porosity which is approximately 5 to 35% based on the theoretical density of iron.

Nach der Erfindung kann die Rauigkeit der Oberflächenstruktur vor der Aufbringung der Emailleschicht vorteilhaft 5 bis 50µ betragen.According to the invention, the roughness of the surface structure before the application of the enamel layer can advantageously be 5 to 50μ.

Die Erfindung sieht auch nach dem vorangegangenen Verfahren hergestellte Bauteile vor, wobei sich diese nicht auf Brennerdeckel beschränken, allerdings ist hier die Erfindung von besonderer Wertigkeit.The invention also provides components produced by the preceding method, these not being on the burner cap restrict, but here the invention is of particular value.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnung. Diese zeigt in den

Fig. 1 bis 4
Beispiele von Brennerdeckelgestaltungen nach der Erfindung.
Further features, details and advantages of the invention result from the following description and from the drawing. This shows in the
1 to 4
Examples of burner cap designs according to the invention.

Ein allgemein mit 1 bezeichneter, in Fig. 1 teilweise geschnittener Brenner weist neben dem hier im Vordergrund stehenden Brennerdeckel 2 mit einer Emaillebeschichtung 3 ein Brennerstativ 4, welches eine mit 5 bezeichnete Gasmulde durchsetzt, sowie weitere Bauteile auf. Die weiteren Bauteile sind beispielsweise ein Steckaufsatz 6, ein Brennerring 7 mit den Gasaustrittskanälen 8 und ggf. mit Zusatzgasaustrittsöffnungen 9, worauf es hier aber nicht näher ankommt.A burner, generally designated 1 and partially sectioned in FIG. 1, has, in addition to the burner cover 2 in the foreground with an enamel coating 3, a burner stand 4 which passes through a gas trough designated 5, and further components. The other components are, for example, a plug-in attachment 6, a burner ring 7 with the gas outlet channels 8 and, if appropriate, with additional gas outlet openings 9, but this is not important here.

Erkennbar kann der Brennerdeckel 2 sehr unterschiedlich gestaltet sein, etwa einen vergleichsweise kleinen Anströmkegel 10, wie im Beispiel der Fig. 1, aufweisen, einen großen Anströmkegel 10a gemäß Fig. 2 oder eine glatte Unterkante 10b, wie in Fig. 3. In Fig. 4 ist schließlich dargestellt, daß der Deckel 2c mit einer nach oben gewölbten Innenfläche 10c ausgerüstet ist.The burner cover 2 can be designed to be very different, for example having a comparatively small inflow cone 10, as in the example in FIG. 1, a large inflow cone 10a in accordance with FIG. 2, or a smooth lower edge 10b, as in FIG. 3. In FIG. 4 is finally shown that the lid 2c is equipped with an upwardly curved inner surface 10c.

Soweit dies die Sintertechnik zuläßt, können auch andere Bauteile erfindungsgemäß gestaltet sein, etwa der Steckaufsatz 6, um nur ein Beispiel zu nennen.As far as the sintering technology permits, other components can also be designed according to the invention, for example the plug-in attachment 6, to name just one example.

Natürlich sind die beschriebenen Ausführungsbeispiele der Erfindung noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken zu verlassen.Of course, the described exemplary embodiments of the invention can be modified in many ways without departing from the basic idea.

Claims (7)

Verfahren zur Erzeugung metallischer Bauteile mittels der Sintertechnik, insbesondere zur Erzeugung von während des Gebrauches Hitze ausgesetzter Bauteile, wie Deckel von Gasbrennern von Haushalts- und Wirtschaftsherden od. dgl.,
dadurch gekennzeichnet,
daß ein durch Sintern hergestelltes Bauteil wenigstens bereichsweise nachfolgend mit einer Emailleschicht versehen wird.Process for the production of metallic components by means of the sintering technique, in particular for the production of components exposed to heat during use, such as covers for gas burners of domestic and commercial cookers or the like.
characterized,
that a component produced by sintering is subsequently provided with an enamel layer at least in some areas. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß vor der Aufbringung der Emailleschicht das Sinterbauteil einem Glühvorgang unterworfen wird.Method according to claim 1,
characterized,
that the sintered component is subjected to an annealing process before the enamel layer is applied. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß als Sintermaterial ein Pulvergemisch aus Basispulver Fe mit Legierungselementen, wie C, Ni, SiO₂ und/oder Silikaten der Erdalkali- oder Alkaligruppen, eingesetzt wird.The method of claim 1 or 2,
characterized,
that a powder mixture of base powder Fe with alloying elements such as C, Ni, SiO₂ and / or silicates of the alkaline earth or alkali groups is used as the sintered material. Verfahren nach Anspruch 3,
dadurch gekennzeichnet,
daß der Anteil an Legierungselementen C < 0,1 %, Ni 0 bis 2 %, SiO₂ 0 bis 5 % und/oder um 5 % Silikate beträgt.Method according to claim 3,
characterized,
that the proportion of alloying elements C <0.1%, Ni 0 to 2%, SiO₂ is 0 to 5% and / or by 5% silicates. Verfahren nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß Sinterteile mit einer Dichte von 5,8 bis 7,4 g/cm³ hergestellt werden mit einer Restporösität von ca. 5 bis 35 % bezogen auf die theoretische Dichte von Fe = 7,8 g/cm³.Method according to one of the preceding claims,
characterized,
that sintered parts with a density of 5.8 to 7.4 g / cm³ are produced with a residual porosity of about 5 to 35% based on the theoretical density of Fe = 7.8 g / cm³. Verfahren nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß Sinterteile mit einer Oberflächenstruktur bzw. Rauigkeit von Ra 5 bis 50µ hergestellt werden.Method according to one of the preceding claims,
characterized,
that sintered parts with a surface structure or roughness of Ra 5 to 50µ are produced. Element eines Gasbrenners, insbesondere Gasbrennerdeckel,
dadurch gekennzeichnet,
daß es aus einem nach der Sintertechnik hergestellten Rohling mit einer bereichsweisen Emailleschicht (3) gebildet ist.Element of a gas burner, in particular gas burner cover,
characterized,
that it is formed from a blank produced by the sintering technique with a region-by-layer enamel layer (3).
EP93118315A 1993-02-03 1993-11-12 Process for making a metallic workpiece by a sintering method Withdrawn EP0609502A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4302967A DE4302967C1 (en) 1993-02-03 1993-02-03 Enamelling of porous sintered ferrous metal part - esp. for surface protection of gas burner cover
DE4302967 1993-02-03

Publications (1)

Publication Number Publication Date
EP0609502A1 true EP0609502A1 (en) 1994-08-10

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EP93118315A Withdrawn EP0609502A1 (en) 1993-02-03 1993-11-12 Process for making a metallic workpiece by a sintering method

Country Status (2)

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EP (1) EP0609502A1 (en)
DE (2) DE4302967C1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010083185A1 (en) * 2009-01-13 2010-07-22 Electrolux Home Products, Inc. High efficiency burner for home appliance
RU177321U1 (en) * 2017-07-25 2018-02-15 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" GAS-BURNER
US11898748B2 (en) 2018-12-26 2024-02-13 3M Innovative Properties Company Burners and additive manufacturing methods

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29620155U1 (en) * 1996-11-20 1998-03-26 Ega Engineering Gmbh Burner cover for gas burners
US6299436B1 (en) 1997-10-20 2001-10-09 Bsh Home Appliances Corporation Plurality fingered burner
DE10124013A1 (en) * 2001-05-17 2002-11-21 Isphording Germany Gmbh Burner head of a gas burner
US7871264B2 (en) 2006-12-29 2011-01-18 Electrolux Home Products, Inc. Hub and spoke burner port configuration
EP2090826B1 (en) * 2008-02-15 2014-11-19 BSH Bosch und Siemens Hausgeräte GmbH Gas burner head
ITTO20111006A1 (en) * 2011-11-03 2013-05-04 Indesit Co Spa GAS BURNER, IN PARTICULAR FOR A COOKING APPLIANCE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5256007A (en) * 1975-11-04 1977-05-09 Nippon Funmatsu Goukin Kk Method of producing heattresisting corrosionnresistant sintered alloy
JPS52150312A (en) * 1976-06-08 1977-12-14 Tokuriki Honten Kk Process for production of perfumed porous material for precioussmetalladorned accessories
JPS58129488A (en) * 1982-01-28 1983-08-02 三菱電機株式会社 Sound absorbing material
SU1644944A1 (en) * 1989-04-18 1991-04-30 Пермский государственный медицинский институт Tooth crown
EP0524710A2 (en) * 1991-07-23 1993-01-27 Wmf Württembergische Metallwarenfabrik Ag Metallic cutlery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5256007A (en) * 1975-11-04 1977-05-09 Nippon Funmatsu Goukin Kk Method of producing heattresisting corrosionnresistant sintered alloy
JPS52150312A (en) * 1976-06-08 1977-12-14 Tokuriki Honten Kk Process for production of perfumed porous material for precioussmetalladorned accessories
JPS58129488A (en) * 1982-01-28 1983-08-02 三菱電機株式会社 Sound absorbing material
SU1644944A1 (en) * 1989-04-18 1991-04-30 Пермский государственный медицинский институт Tooth crown
EP0524710A2 (en) * 1991-07-23 1993-01-27 Wmf Württembergische Metallwarenfabrik Ag Metallic cutlery

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 7725, 1977 Derwent World Patents Index; Class D08, AN 92-103089 *
DATABASE WPI Section Ch Week 7725, 1977 Derwent World Patents Index; Class M13, AN 77-044053Y *
DATABASE WPI Section Ch Week 7805, 1978 Derwent World Patents Index; Class D10, AN 78-08919A *
DATABASE WPI Section Ch Week 8336, 1983 Derwent World Patents Index; Class L02, AN 83-756537 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010083185A1 (en) * 2009-01-13 2010-07-22 Electrolux Home Products, Inc. High efficiency burner for home appliance
CN102326026A (en) * 2009-01-13 2012-01-18 伊莱克斯家用产品公司 Burner with high efficiency
US8596259B2 (en) 2009-01-13 2013-12-03 Electrolux Home Products, Inc. High efficiency burner
RU2525364C2 (en) * 2009-01-13 2014-08-10 Электролюкс Хоум Продактс, Инк. Gas burner (versions)
AU2010204865B2 (en) * 2009-01-13 2014-10-30 Electrolux Home Products, Inc. High efficiency burner for home appliance
RU177321U1 (en) * 2017-07-25 2018-02-15 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" GAS-BURNER
US11898748B2 (en) 2018-12-26 2024-02-13 3M Innovative Properties Company Burners and additive manufacturing methods

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Publication number Publication date
DE9318510U1 (en) 1994-07-28
DE4302967C1 (en) 1994-06-01

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