EP1041343A1 - Method for sealingly closing the connection end side of the incandescent tube of a heating plug and heating plug with the thus obtained closure - Google Patents

Method for sealingly closing the connection end side of the incandescent tube of a heating plug and heating plug with the thus obtained closure Download PDF

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Publication number
EP1041343A1
EP1041343A1 EP00106730A EP00106730A EP1041343A1 EP 1041343 A1 EP1041343 A1 EP 1041343A1 EP 00106730 A EP00106730 A EP 00106730A EP 00106730 A EP00106730 A EP 00106730A EP 1041343 A1 EP1041343 A1 EP 1041343A1
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EP
European Patent Office
Prior art keywords
glow tube
glow
tube
side end
connection
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
Application number
EP00106730A
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German (de)
French (fr)
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EP1041343B1 (en
Inventor
Rudi Heinz
Rainer Hain
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BorgWarner Ludwigsburg GmbH
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Beru AG
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Publication of EP1041343A1 publication Critical patent/EP1041343A1/en
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Publication of EP1041343B1 publication Critical patent/EP1041343B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
    • E04H6/08—Garages for many vehicles
    • E04H6/12—Garages for many vehicles with mechanical means for shifting or lifting vehicles
    • E04H6/18—Garages for many vehicles with mechanical means for shifting or lifting vehicles with means for transport in vertical direction only or independently in vertical and horizontal directions
    • E04H6/28—Garages for many vehicles with mechanical means for shifting or lifting vehicles with means for transport in vertical direction only or independently in vertical and horizontal directions characterised by use of turntables or rotary rings for horizontal transport
    • E04H6/282—Garages for many vehicles with mechanical means for shifting or lifting vehicles with means for transport in vertical direction only or independently in vertical and horizontal directions characterised by use of turntables or rotary rings for horizontal transport turntables, rotary elevators or the like on which the cars are not permanently parked
    • E04H6/285—Garages for many vehicles with mechanical means for shifting or lifting vehicles with means for transport in vertical direction only or independently in vertical and horizontal directions characterised by use of turntables or rotary rings for horizontal transport turntables, rotary elevators or the like on which the cars are not permanently parked using car-gripping transfer means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines

Definitions

  • the invention relates to a method for sealing Closing the connection-side end area of a Glow tube of a glow plug, and a corresponding glow plug.
  • rotary kneading machines also known as hammers or Reduction machines are used, which through pressure forming with a relatively fast sequence of work pulses Reduce the outer diameter in the feed process and so that Glow tube filled with inner pole and insulator above the sealing ring to lock.
  • Circular kneading machines shape the pusher with high Working frequency of radially oscillating tools
  • the workpiece located in the center of the tool accordingly.
  • the plunger and tools open between the strokes by centrifugal force, and the workpiece becomes axial pushed further.
  • the one with round kneading in the cold working process achievable tolerances are +/- 0.01 mm.
  • the original outer diameter of the glow tube is in a certain length to a certain dimension, which is usually is not yet the final dimension, reduced, and sits thus firmly on the inner pole, sealing element and insulation material.
  • the connection created in this process must be capable of being handled in bulk the next step is to reduce the heating element to its final dimension.
  • a disadvantage of those known from the prior art Round kneading process and round kneading devices is the high one Noise development that makes soundproofing cabins necessary.
  • the noise level is due to the high level required Ram frequency caused by the low deformation per stroke of the circular kneading machine.
  • the proportion of friction the work pieces in the tools must be large to prevent that the workpiece from the tools against the Feed direction is driven out.
  • the noises arise especially in the places where the plunger is on Rolling (rolling), tools on workpiece and, when idling, the tool halves of the circular kneaders on top of each other to meet.
  • the object of the invention is to overcome the listed disadvantages to provide a method that to the needs of sealing sealing of the specified glow tube end area is cut and in mass production of glow plugs can be incorporated can, as well as further processing in mass production allowed.
  • damage to the sealing ring material should also be avoided to harmful intrusion to prevent oxygen.
  • glow plugs are supposed to be made available in which the sealing of the connection-side end portion of a glow plug tube meets the necessary requirements for such sealing.
  • the object of the invention is achieved by the method according to claim 1 with the advantageous embodiments Claims 2 to 5, or by the glow plug according to claim 6 with the following preferred embodiment according to claim 7 solved.
  • FIG. 1 there is usually a glow plug a glow tube 3 with heating and possibly control elements 5, which in Insulating material 4 are embedded; that or the heating elements 5 are on the connection side with a rod-shaped inner pole 1 firmly connected within the glow tube 3; the inner pole 1 protrudes from the connection-side end region of the glow tube 3 out; it is usually centered in the outlet opening fixed by means of an overlying sealing element 2, the sealing element 2 simultaneously the interior of the Glow tube 3 seals to the outside.
  • This connection side End region of the glow tube 3 is used for fixation and fixation of the inner pole 1 and completion of the sealing usually completed by rotary kneading, the Diameter of this glow tube area is reduced at the same time becomes.
  • the crimping according to the invention is carried out a known crimping tool for crimping 6 of the connection-side end region of the glow tube 3, whereby the inner pole 1 is fixed centrally and the sealing element 2, preferably a sealing ring, is not damaged because in Contrary to the usual round kneading, rolling or rolling flanging processes, a deformation of the sealing ring far below the yield strength of the usual material.
  • the entire heating rod is then hammered out further compressed and the diameter to be Gauge reduced. This process also involves crimping reworked and given a cylindrical shape again and surface, which is then pressed into the glow plug body becomes.
  • the method according to the invention requires lower investment costs and lower tooling costs due to the simplified Procedure and the simplified device, with longer service lives and longer cycle times are achievable.
  • the glow plugs according to the invention also have less susceptibility to oxygen penetration and the resulting malfunction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Resistance Heating (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

The heater plug has a glow tube containing one or more heating and or regulating elements embedded in insulating material. T connecting side end of the heating element is fixed to a bar-shaped inner pole protruding from the connecting side end of the gl tube. The end part of the glow tube is crimped by means of a sealing element enclosing the inner pole and sealing off the interi of the glow tube, and finally worked into a cylindrical shape.

Description

Gegenstand der Erfindung ist ein Verfahren zum abdichtenden Verschließen des anschlußseitigen Endbereichs eines Glührohres einer Glühkerze, sowie eine entsprechende Glühkerze.The invention relates to a method for sealing Closing the connection-side end area of a Glow tube of a glow plug, and a corresponding glow plug.

Es ist bekannt, den anschlußseitigen Endbereich eines Glührohres einer Glühkerze durch Rundkneten im Durchmesser zu verringern, wobei eine zentrische, feste und abdichtende Verbindung des Glührohrendes mit dem herausragendem Innenpol der Glühkerze ohne Beschädigung des in diesem Bereich angeordneten Dichtringes erzielt werden soll.It is known to connect the end portion of a Glow tube of a glow plug by kneading in diameter reduce, being a centric, firm and sealing Connection of the glow tube end with the protruding inner pole the glow plug without damaging the arranged in this area Sealing ring should be achieved.

Hierzu werden Rundknetmaschinen, die auch als Hämmer- oder Reduziermaschinen bezeichnet werden, eingesetzt, die durch Druckumformen mit relativ schneller Arbeitsimpulsfolge Außendurchmesser im Vorschubverfahren verkleinern und so das mit Innenpol und Isolator befüllte Glührohr über dem Dichtring abschließen.For this purpose, rotary kneading machines, also known as hammers or Reduction machines are used, which through pressure forming with a relatively fast sequence of work pulses Reduce the outer diameter in the feed process and so that Glow tube filled with inner pole and insulator above the sealing ring to lock.

Rundknetmaschinen formen die über Stößel mit hoher Arbeitsfrequenz radial oszillierenden Werkzeuge das sich im Zentrum des Werkzeugs befindliche Werkstück entsprechend um. Hierbei wird immer dann ein schneller, kurzer Umformhub von dem Werkzeug auf das im Zentrum befindliche Werkstück übertragen, wenn ein Stößelpaar unter einem Rollenpaar durchläuft. Zwischen den Hüben öffnen sich die Stößel und Werkzeuge durch Zentrifugalkraft, und das Werkstück wird axial weiter eingeschoben. Die beim Rundkneten im Kaltarbeitsverfahren erzielbaren Toleranzen liegen bei +/- 0,01 mm.Circular kneading machines shape the pusher with high Working frequency of radially oscillating tools The workpiece located in the center of the tool accordingly. Here, a quick, short forming stroke of transfer the tool to the workpiece in the center, when a pair of tappets passes under a pair of rollers. The plunger and tools open between the strokes by centrifugal force, and the workpiece becomes axial pushed further. The one with round kneading in the cold working process achievable tolerances are +/- 0.01 mm.

Der ursprüngliche Außendurchmesser des Glührohrs wird in einer bestimmten Länge auf ein bestimmtes Maß, das üblicherweise noch nicht das Endmaß ist, reduziert, und sitzt damit fest auf Innenpol, Dichtelement und Isolationsmaterial. Die hierbei erzeugte Verbindung muß schüttgutfähig für den nächsten Arbeitsgang sein, der das Reduzieren des Heizstabes auf sein Endmaß betrifft.The original outer diameter of the glow tube is in a certain length to a certain dimension, which is usually is not yet the final dimension, reduced, and sits thus firmly on the inner pole, sealing element and insulation material. The connection created in this process must be capable of being handled in bulk the next step is to reduce the heating element to its final dimension.

Nachteilig an den aus dem Stand der Technik bekannten Rundknetverfahren und Rundknetvorrichtungen ist die hohe Geräuschentwicklung, die Schallschutzkabinen notwendig macht. Die Geräuschentwicklung wird durch die benötigte hohe Stößelfrequenz verursacht, die durch die geringe Umformung je Hub der Rundknetmaschine bedingt ist. Der Reibungsanteil der Werkstücke in den Werkzeugen muß groß sein, um zu verhindern, daß das Werkstück aus den Werkzeugen entgegen der Vorschubrichtung herausgetrieben wird. Die Geräusche entstehen insbesondere an den Stellen, an denen Stößel auf Walzen (Rollen), Werkzeuge auf Werkstück und, bei Leerlauf, die Werkzeughälften der Rundknetvorrichtungen aufeinander treffen.A disadvantage of those known from the prior art Round kneading process and round kneading devices is the high one Noise development that makes soundproofing cabins necessary. The noise level is due to the high level required Ram frequency caused by the low deformation per stroke of the circular kneading machine. The proportion of friction the work pieces in the tools must be large to prevent that the workpiece from the tools against the Feed direction is driven out. The noises arise especially in the places where the plunger is on Rolling (rolling), tools on workpiece and, when idling, the tool halves of the circular kneaders on top of each other to meet.

Darüberhinaus besteht durch die große radiale und axiale Belastung des zu bearbeitenden Endbereichs des Glührohres die Gefahr einer Beschädigung des darin angeordneten Dichtelements, beispielsweise durch Überdehnung.In addition, there is a large radial and axial Load on the end area of the glow tube to be machined the risk of damage to what is arranged therein Sealing element, for example by overstretching.

Erfahrungsgemäß ist auch eine zentrische Lage des Innenpols nicht 100%ig sicher zu stellen, so daß es hierdurch zu unerwünschten Ausfällen kommt. Da sich das Glührohr im Werkzeug mitdreht, besteht die Gefahr, daß dieses in anliegenden Bereichen angefräst wird. Nachteiligerweise kommen auch hohe Investitionskosten für die Rundknetmaschine und hohe Werkzeugkosten, großer Platzbedarf und unverhältnismäßiger Werkzeugverschleiß hinzu, zumal das vorbekannte Verfahren des Rundknetens als Mittel zur Abdichtung des Glührohrendbereichs überdimensioniert ist; ebenfalls hat sich gezeigt, daß die genannten Fertigungstoleranzen hierbei nicht benötigt werden.Experience has shown that the inner pole is in a central position not 100% sure to ensure that this will result undesirable failures occur. Since the glow tube in the Tool rotates, there is a risk that this in adjacent Areas is milled. Disadvantageously come also high investment costs for the rotary kneading machine and high tool costs, large space requirements and disproportionate Tool wear added, especially since the known Circular kneading process as a means of sealing the Glow tube end area is oversized; also has It has been shown that the manufacturing tolerances mentioned here are not needed.

Aufgabe der Erfindung ist es, unter Überwindung der aufgeführen Nachteile ein Verfahren zur Verfügung zu stellen, daß auf die Bedürfnisse des abdichtenden Verschließens des angegebenen Glührohrendbereichs zugeschnitten ist und in die Massenproduktion von Glühkerzen eingegliedert werden kann, sowie die Weiterverarbeitung in Massenproduktion erlaubt. Insbesondere sollen auch Beschädigungen des Dichtringwerkstoffs vermieden werden, um schädliches Eindringen von Sauerstoff zu verhindern. Schließlich sollen Glühkerzen zur Verfügung gestellt werden, bei denen die Abdichtung des anschlußseitigen Endbereichs eines Glühkerzenrohres den notwendigen Anforderungen an solche Abdichtung entspricht.The object of the invention is to overcome the listed disadvantages to provide a method that to the needs of sealing sealing of the specified glow tube end area is cut and in mass production of glow plugs can be incorporated can, as well as further processing in mass production allowed. In particular, damage to the sealing ring material should also be avoided to harmful intrusion to prevent oxygen. After all, glow plugs are supposed to be made available in which the sealing of the connection-side end portion of a glow plug tube meets the necessary requirements for such sealing.

Die Aufgabe der Erfindung wird durch das Verfahren gemäß Anspruch 1 mit den vorteilhaften Ausgestaltungen nach Ansprüchen 2 bis 5, bzw. durch die Glühkerze nach Anspruch 6 mit der nachfolgenden bevorzugten Ausgestaltung nach Anspruch 7 gelöst.The object of the invention is achieved by the method according to claim 1 with the advantageous embodiments Claims 2 to 5, or by the glow plug according to claim 6 with the following preferred embodiment according to claim 7 solved.

Die Erfindung wird anhand der beigefügten Figuren 1 und 2 näher erläutert.

  • Figur 1 ist der schematische Längsschnitt durch eine Glühkerze aus dem Stand der Technik;
  • Figur 2 ist eine schematische Seitenansicht des anschlußseitigen Endbereichs des Glührohres einer erfindungsgemäß hergestellten Glühkerze;
    • The invention is explained in more detail with reference to the attached FIGS. 1 and 2.
  • Figure 1 is the schematic longitudinal section through a glow plug from the prior art;
  • FIG. 2 is a schematic side view of the connection-side end region of the glow tube of a glow plug produced according to the invention;

    • Gemäß Figur 1 besteht üblicherweise eine Glühkerze aus einem Glührohr 3 mit Heiz- und ggf. Regelelementen 5, die in Isoliermaterial 4 eingebettet sind; das oder die Heizelemente 5 sind anschlußseitig mit einem stabförmigen Innenpol 1 innerhalb des Glührohres 3 fest verbunden; der Innenpol 1 ragt aus dem anschlußseitigen Endbereich des Glührohres 3 heraus; er ist üblicherweise in der Austrittöffnung zentrisch mittels eines obenliegenden Dichtelements 2 fixiert, wobei das Dichtelement 2 gleichzeitig den Innenraum des Glührohres 3 nach außen hin abdichtet. Dieser anschlußseitige Endbereich des Glührohres 3 wird zur Fixierung und Fixierung des Innenpoles 1 und Vervollständigung der Abdichtung üblicherweise durch Rundkneten abgeschlossen, wobei der Durchmesser dieses Glührohrbereichs gleichzeitig reduziert wird.According to FIG. 1, there is usually a glow plug a glow tube 3 with heating and possibly control elements 5, which in Insulating material 4 are embedded; that or the heating elements 5 are on the connection side with a rod-shaped inner pole 1 firmly connected within the glow tube 3; the inner pole 1 protrudes from the connection-side end region of the glow tube 3 out; it is usually centered in the outlet opening fixed by means of an overlying sealing element 2, the sealing element 2 simultaneously the interior of the Glow tube 3 seals to the outside. This connection side End region of the glow tube 3 is used for fixation and fixation of the inner pole 1 and completion of the sealing usually completed by rotary kneading, the Diameter of this glow tube area is reduced at the same time becomes.

    Gemäß Figur 2 führt das erfindungsgemäße Crimpen mit einem an sich bekannten Crimpwerkzeug zu einer Crimpung 6 des anschlußseitigen Endbereichs des Glührohres 3, wodurch der Innenpol 1 zentrisch fixiert und das Dichtelement 2, vorzugsweise ein Dichtring, nicht beschädigt wird, weil im Gegensatz zu den üblichen Rundknet-, Roll- oder Rollbördelverfahren, eine Verformung des Dichtringes weit unterhalb der Dehngrenze des üblichen Materials erfolgt. Bevorzugt werden sechs Crimpgrate ausgeführt, die gleichförmig um den genannten Endbereich angeordnet sind; die axiale Länge der Crimpung beträgt bei dieser Ausführungsform bevorzugt etwa 10 mm.According to FIG. 2, the crimping according to the invention is carried out a known crimping tool for crimping 6 of the connection-side end region of the glow tube 3, whereby the inner pole 1 is fixed centrally and the sealing element 2, preferably a sealing ring, is not damaged because in Contrary to the usual round kneading, rolling or rolling flanging processes, a deformation of the sealing ring far below the yield strength of the usual material. Prefers six crimping ridges are made that are uniform around the said end region are arranged; the axial length of the In this embodiment, crimping is preferably approximately 10 mm.

    Anschließend wird der gesamte Heizstab durch Rundhämmern weiter verdichtet und dabei der Durchmesser auf sein Endmaß reduziert. Bei diesem Vorgang wird auch die Vercrimpung nachgearbeitet und erhält wieder eine zylindrische Form und Oberfläche, die dann in den Glühkerzenkörper eingepreßt wird.The entire heating rod is then hammered out further compressed and the diameter to be Gauge reduced. This process also involves crimping reworked and given a cylindrical shape again and surface, which is then pressed into the glow plug body becomes.

    Die Vorteile der Erfindung lassen sich wie folgt zusammenfassen:The advantages of the invention can be summarized as follows:

    Wegen des Einsatzes an sich bekannter Crimpwerkzeuge erfordert das erfindungsgemäße Verfahren geringere Investitionskosten und geringere Werkzeugkosten wegen der vereinfachten Verfahrensweise und der vereinfachten Vorrichtung, wobei gleichzeitig höhere Standzeiten und höhere Taktzeiten erzielbar sind.Because of the use of known crimping tools the method according to the invention requires lower investment costs and lower tooling costs due to the simplified Procedure and the simplified device, with longer service lives and longer cycle times are achievable.

    Darüberhinaus ist ein genauerer Rundlauf als im Stand der Technik gegeben, und Beschädigung des Dichtringes wird vermieden; gleichzeitig tritt bei dem erfindungsgemäßen Verfahren wesentlich geringere Geräuschentwicklung als bei dem vorbekannten auf.In addition, a more precise concentricity than in the stand the technology, and damage to the sealing ring avoided; at the same time occurs in the invention Process significantly less noise than in the known one.

    Die erfindungsgemäßen Glühkerzen weisen darüber hinaus geringere Anfälligkeit gegenüber Eindringen von Sauerstoff und dadurch bedingten Funktionsausfall auf.The glow plugs according to the invention also have less susceptibility to oxygen penetration and the resulting malfunction.

    Claims (7)

    Verfahren zum abdichtenden Verschließen des anschlußseitigen Endbereichs eines Glührohres einer Glühkerze, dadurch gekennzeichnet, daß man den genannten Bereich des Glührohres (3) vercrimpt.Method for sealing the connection side End region of a glow tube of a glow plug, characterized in that the said area of Glow tube (3) crimped. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man den anschlußseitigen Bereich des Glührohres (3), in dem ein oder mehrere Heiz- und/oder Regelelemente (5) in Isoliermaterial (4) eingebettet sind, mit einem Dichtelement (2) verschließt, und die Crimpung (6) über dem Dichtelement (2) ausführt.A method according to claim 1, characterized in that the connection-side area of the glow tube (3), in which one or more heating and / or control elements (5) in Insulating material (4) are embedded with a sealing element (2) closes, and the crimping (6) over the sealing element (2) executes. Verfahren nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß das Crimpen unter gleichzeitiger Durchmesserreduzierung des anschlußseitigen Endbereichs des Glührohres (3) durchführt.A method according to claim 1 and / or 2, characterized characterized in that the crimping while reducing the diameter of the connection-side end region of the glow tube (3) performs. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß man eine Durchmesserreduzierung um etwa 8-10 % bewirkt.A method according to claim 3, characterized in that a diameter reduction of about 8-10% is achieved. Verfahren nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Crimpbereich zu zylindrischer Form nachgearbeitet wird.Method according to at least one of claims 1 to 4, characterized in that the crimping area is too cylindrical Shape is reworked. Glühkerze mit einem Glührohr (3), in dem in Isoliermaterial (4) ein oder mehrere Heiz- und/oder Regelelemente (5) eingebettet sind, wobei der anschlußseitige Endbereich des Heizelements (5) mit einem stabförmigen Innenpol (1) fest verbunden ist, wobei der Innenpol (1) aus dem anschlußseitigen Endbereich des Glührohres (3) herausragt, und wobei dieser Endbereich des Glührohres (3) über einem Dichtelement (2), das den Innenpol (1) umgibt und den Innenraum des Glührohres (3) abdichtet, vercrimpt und anschließend zu zylindrischer Form nachgearbeitet ist.Glow plug with a glow tube (3) in which in insulating material (4) one or more heating and / or control elements (5) are embedded, the connection-side end region of the heating element (5) with a rod-shaped inner pole (1) is firmly connected, the inner pole (1) from the connection side End region of the glow tube (3) protrudes, and this end region of the glow tube (3) above a sealing element (2) that surrounds the inner pole (1) and the interior the glow tube (3) seals, crimped and then closed cylindrical shape is reworked. Glühkerze nach Anspruch 6, dadurch gekennzeichnet, daß die Crimpung (6) sechs gleichmäßig um den Endbereich des Glührohrs (3) verteilte Crimpgrate aufweist, wobei der Glührohrdurchmesser dieses Bereichs durch den Crimpvorgang um etwa 8 bis etwa 10 % reduziert ist, und wobei die Crimpung (6) in axialer Richtung über etwa 10 mm verläuft.Glow plug according to claim 6, characterized in that the crimp (6) six evenly around the end of the Glow tube (3) has distributed crimp burrs, the glow tube diameter this area by the crimping process about 8 to about 10% is reduced, and being crimped (6) extends about 10 mm in the axial direction.
    EP00106730A 1999-03-31 2000-03-29 Method for sealingly closing the connection end side of the incandescent tube of a heating plug and heating plug with the thus obtained closure Expired - Lifetime EP1041343B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19914619A DE19914619A1 (en) 1999-03-31 1999-03-31 Method for sealing the connection-side end region of the glow tube of a glow plug and glow plugs with a closure according to the method
    DE19914619 1999-03-31

    Publications (2)

    Publication Number Publication Date
    EP1041343A1 true EP1041343A1 (en) 2000-10-04
    EP1041343B1 EP1041343B1 (en) 2004-06-02

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    US (1) US6252200B1 (en)
    EP (1) EP1041343B1 (en)
    JP (1) JP4309015B2 (en)
    KR (1) KR20000063077A (en)
    AT (1) ATE268454T1 (en)
    DE (2) DE19914619A1 (en)
    ES (1) ES2216750T3 (en)

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    WO2012076246A1 (en) * 2010-12-06 2012-06-14 Robert Bosch Gmbh Glow plug having a graphite seal and an electric insulating layer

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    US6636780B1 (en) * 2000-11-07 2003-10-21 Mdg Medical Inc. Medication dispensing system including medicine cabinet and tray therefor
    JP2002359060A (en) * 2001-05-31 2002-12-13 Ngk Spark Plug Co Ltd Heater and method of manufacturing heater

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    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2012076254A1 (en) * 2010-12-06 2012-06-14 Robert Bosch Gmbh Glow plug and method for the production thereof
    WO2012076246A1 (en) * 2010-12-06 2012-06-14 Robert Bosch Gmbh Glow plug having a graphite seal and an electric insulating layer
    CN103250002A (en) * 2010-12-06 2013-08-14 罗伯特·博世有限公司 Glow plug having a graphite seal and an electric insulating layer
    CN103250002B (en) * 2010-12-06 2015-04-01 罗伯特·博世有限公司 Glow plug having a graphite seal and an electric insulating layer

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    JP4309015B2 (en) 2009-08-05
    US6252200B1 (en) 2001-06-26
    JP2000291955A (en) 2000-10-20
    EP1041343B1 (en) 2004-06-02
    ES2216750T3 (en) 2004-11-01
    DE19914619A1 (en) 2000-10-12
    KR20000063077A (en) 2000-10-25
    DE50006645D1 (en) 2004-07-08
    ATE268454T1 (en) 2004-06-15

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