EP0982973B2 - Sensor zur Kochgefässerkennung - Google Patents

Sensor zur Kochgefässerkennung Download PDF

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Publication number
EP0982973B2
EP0982973B2 EP99123892A EP99123892A EP0982973B2 EP 0982973 B2 EP0982973 B2 EP 0982973B2 EP 99123892 A EP99123892 A EP 99123892A EP 99123892 A EP99123892 A EP 99123892A EP 0982973 B2 EP0982973 B2 EP 0982973B2
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EP
European Patent Office
Prior art keywords
sensor
loop
radiant heater
sensor loop
heater according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99123892A
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German (de)
English (en)
French (fr)
Other versions
EP0982973A2 (de
EP0982973A3 (de
EP0982973B1 (de
Inventor
Martin Gross
Nils Platt
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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Publication date
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Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to DE29724662U priority Critical patent/DE29724662U1/de
Priority to EP03022466A priority patent/EP1379105A3/de
Priority to DE29724774U priority patent/DE29724774U1/de
Publication of EP0982973A2 publication Critical patent/EP0982973A2/de
Publication of EP0982973A3 publication Critical patent/EP0982973A3/de
Application granted granted Critical
Publication of EP0982973B1 publication Critical patent/EP0982973B1/de
Publication of EP0982973B2 publication Critical patent/EP0982973B2/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the invention relates to an electric radiant heater with an active sensor for detecting the positioning of a cooking vessel on a heating plate covering the cooking plate, in particular a glass ceramic plate.
  • the mentioned one-wind pot detection loop is from the DE 37 11 589 A1 known. It is a passive short-circuit loop, which is arranged between the heating elements and a glass ceramic plate. It is acted upon externally by a magnetic field transmitter arranged below the heating elements. By periodic short-circuiting and a corresponding Bedämpfungsunk the evaluation circuit is applied. The introduction of such a system in practice fails because of the great effort and especially the required large height to accommodate the magnetic encoder.
  • the aforementioned multi-winding coils in the outer edge region pose thermal problems and, as has been recognized according to the invention and as will be explained later, are less suitable for sharp signal generation and detection.
  • a circuit arrangement g has become known for a pan detection system with a drip detection sensor which operates in the manner of a passive quadrupole.
  • the type of transmitter and receiver antennas operating sensor is applied to the underside of the hot plate as a printed circuit and has a generally spiral arrangement.
  • the EP 0 469 189 A describes a control method for the heating elements of a cooker with a designed as an air coil with only a few turns sensor, on the arrangement and design of the rest, no information is provided.
  • the object of the invention is to provide a radiant heater with an active sensor that provides a simple and robust design as concise as possible signal to control the radiator.
  • the sensor which is part of an inductively, preferably by means of oscillating circuit detuning resonant circuit of a control, is arranged as a loop of electrically conductive material in the region of the heating zone and this at least partially arranged across.
  • the signal is significantly more meaningful for the coverage of the heating zone and thus for the detection of a sensor circulating in the edge region of the radiator more concise.
  • This is unusual in that it should be assumed that the associated cooking vessel size would be detected particularly accurately by a sensor arranged at the edge, because the signal size in the form of the relative frequency shift in the edge region is particularly large and then drops sharply (parabolically) towards the center.
  • edge coil can hardly distinguish between a relatively small pot, which is still to effect a switch, and a large, but shifted to the heating pot pot, which should cause no intervention.
  • edge coils due to the fact that radiant heaters are usually arranged in a metal plate whose bottom and especially its edge strongly damped the resonant circuit. The field thus extends to a very narrow edge region, which provides an evaluable signal at all.
  • the sensor loop should therefore have its effective diameter in the range of the minimum diameter, advantageously something above it, namely around the area of the magnetic field "hose". As a result of the distance to the outer edge there is no significant attenuation by this, which would simulate a pot, so to speak.
  • the invention therefore advantageously allows the sensor loop in the immediate area of the heating zone, i. Immediately exposed to the radiant heat, because in such a coil with a winding with air gap in between an insulation is not necessary.
  • It consists of a shape-stable, self-supporting and temperature-resistant conductive material, preferably of a tube or solid, strong wire.
  • the material used is a material such as a high alloy steel, e.g. a FeCrNi alloy in question.
  • the formation of non-ferromagnetic material is expedient because with a ferromagnetic material due to the high temperature occurring, the Curie point would be exceeded and the magnetic properties changing in this point would give rise to a signal completely different from the desired determination of a cooking vessel position is independent and therefore the result would be distorted.
  • the sensor loop and the controller can be advantageously designed for cooking vessel size detection.
  • the sensor loop may have different effective ranges at a radial distance from each other, e.g. in different peripheral regions substantially in the circumferential direction extending loop portions which are interconnected by radial connecting portions.
  • a sensor loop with a circular or polygonal shape with omega-shaped bulges can result. This cloverleaf has been recognized as particularly effective.
  • the characteristic curve "frequency deviation / diametrical coverage by the cooking vessel" has, in contrast to the parabolic curve, a stage progression with a steep portion displaced more towards the interior of the heating zone, which can have two diameter stages in two-circuit radiators.
  • the waveform can be more adapted to the ideal shape. This would be the radiator with only one heating zone, a flat waveform in the edge region, the steepest possible drop in the range of the diameter of a smallest possible pot, which should still lead to an intervention, and then a shallow, the lowest possible course to Schuzonenmitte out.
  • the robust, self-supporting sensor loop can be easily arranged in any radiator configurations. These usually have an outer edge made of insulating material and two-ring radiators possibly an intermediate wall. On this, the sensor loop can rest, for which recesses may be provided in order to establish a system of sensor and insulating edge on the plate or a certain, but only small distance thereto. Even with existing radiator designs, retrofitting with pan detection is possible.
  • the Fig. 1 and 2 show an electric radiant heater 11, which is arranged under a glass ceramic plate 12 of an electric cooktop or other Strahlungskochös. It has a flat sheet metal plate 13, the bottom 14 and edge 15 receive a bottom layer 16 and a rim 17 of electrically and thermally insulating and insulating heat-resistant insulating material. It is preferably a microporous, pressed from bulk material fumed silica airgel.
  • the outer edge 17 is made separately because of improved mechanical strength and consists of a pressed or wet-formed and then dried ceramic fiber with binders, etc.
  • the sheet edge 15 is not quite up to the glass ceramic plate 12 zoom, but probably the insulating edge 17 which is pressed from below to the glass ceramic plate by the heater 11 is pressed by a pressure spring, not shown, upwards.
  • the radiant heater has two mutually concentric heating zones 18, 19, which are delimited from one another by an intermediate wall 20, but which does not reach up to the glass ceramic plate.
  • electrical heating elements 21 are arranged in the form of thin, wavy deformed bands which are arranged standing upright on the surface 22 of the insulator 16 and anchored in this formed with feet on its underside, due to the curl of the band have a spade shape. They cover the two heating zones 18, 19 uniformly, with the exception of an unheated central zone 59, in which an upwardly directed projection 43 of the insulating floor 16 is located.
  • Fig. 2 shows the arrangement of the heating elements in meandering ring tracks. They are connected via Schuelementan Why 23 to a temperature monitor 24 and a separate connection block 25 so that the outer heating zone 19 of the constantly activated during operation of the radiator heating zone 18 can be switched on.
  • the temperature monitor 24 has a rod-shaped sensor 26, which acts on a temperature monitor / contact to maintain a permissible maximum temperature on the glass ceramic underside and a hot-alarm contact for signaling the hot condition of the radiator in a temperature monitor head 27.
  • the sensor 26 protrudes through the Isolier Sciencesrand 17 and through the intermediate wall 20 therethrough and extends in a plane above the heating elements 21, but mostly in an area free of heating elements lane 28th
  • the radiator has a sensor in the form of a loop 30, which is part of a control 31 for detecting the positioning of a cooking vessel on the radiator covering the cooking plate 12.
  • the sensor loop 30 forms an inductance of a resonant circuit 32, which is excited at a relatively high frequency of, for example, 1 MHz to 5 MHz.
  • the damping of the sensor loop 30 and thus the frequency of the resonant circuit 32 changes. This is evaluated in the controller 31 and depending on mechanical or electronic switches 33, 33 a are controlled in the control, the heating zones 18, 19 for Switch on operation.
  • a power control unit 34 (often referred to as an energy regulator) is also provided, which can be adjusted via a knob 35 to a certain power. It can also be provided a temperature controller. Control or control is usually a cycling power release, i. to a suspension control or control.
  • the power controller 34 may be thermo-mechanical, i. be designed as a bimetal switch or, preferably, as an electronic component that may optionally be integrated into the controller 31.
  • the line between the actual sensor loop 30 and the other elements of the resonant circuit should be kept as short as possible. A shielding of the cables is possible. Possibly.
  • the component 36 of the control which contained the actual cooking vessel detection, could also be arranged separately from the rest of the radiator control, spatially close to the radiant heater 11.
  • the sensor loop 30 consists of a relatively thick round wire with a diameter between 1 and 4 millimeters, preferably about 2 millimeters, of a heat-resistant and non-magnetizable material.
  • This can be, for example, a high-alloy steel such as an iron-chromium-nickel alloy. Suitable materials are e.g. a steel with the material no. 1.4876 or a Schuleitermaterial with the material no. 2.4869.
  • the sensor can be grounded on one side. To achieve a low grounding resistance (preferably less than 0.1 ohms), and the required for this very low resistance of the sensor, this can be made correspondingly thick. However, because of the skin effect, only its surface is effective for its function as a pot detection sensor with Hochfrequenzbeetzung, so that they could also be designed as a tube. Because of the low ohmic resistance, this could then also be filled with copper or another highly conductive material, while the jacket material ensures temperature resistance and scaling resistance. Particularly advantageous is an embodiment with a highly electrically conductive galvanic coating, for example made of silver, or an embodiment of good conductive solid material with, for example, galvanic, scale-resistant coating. The very rigid design of the sensor loop 30 ensures that is not to be expected even at high thermal stresses with a drop to the heating elements 21.
  • the sensor loop forms a single-winding coil with outer circumferential sections 37 extending over the outer heating zone 19 but with a relatively large radial distance from the outer edge 17 and inner circumferential sections 38, again at a radial distance from the intermediate wall 20, above the heating zone 18.
  • peripheral sections are in Fig. 2 Circular arc sections of different diameters, which are interconnected by connecting portions 39. Although these connecting portions extend substantially radially, but obliquely so that the sum of the angle of the outer and inner peripheral portions 37, 38 is greater than 360 °.
  • the top view of the sensor loop 30 has the basic shape of a trilobal clover having a relatively large, nearly full-circle center region and three lateral "leaves" in the shape of a triangular sector or omega. Depending on the size and control requirements, more peripheral section sectors may be provided. On one of the peripheral portion sectors 40 are provided terminals 41 in the form of outwardly directed, mutually parallel portions of the loop material.
  • the entire sensor loop 30 with the described shape is flat and self-supporting and dimensionally stable due to the relatively strong material. It lies in the present example, on the one hand in the region of the terminals 41 in shallow depressions of the insulator outer edge 17 and is supported in the rest with their connecting portions 39 on the intermediate wall 20, which does not quite come up to the glass ceramic plate. As a result, the sensor loop is arranged adjacent or at a small distance from the underside of the glass ceramic plate 12 and with a safety distance above the heating elements 21. It can be seen that the sensor 26 of the temperature monitor as a result of the arrangement shown, the sensor loop underpasses only once, in the area an inner peripheral portion 38.
  • FIG. 2 shows a dual-circuit heater with two concentric heating zones 18, 19
  • Fig. 4 a two-circuit radiator shown with a total oblong oval shape.
  • This radiant heater 11 has the rest of the same basic structure a circular Haupttogetherzone 18, to which one side, delimited by an intermediate wall 20, an additional heating zone 19 connects, which has a half or quarter moon shape.
  • a temperature monitor 24 is provided obliquely at the main heating zone 18 and its sensor 26 protrudes radially only about to the middle, where it rests on a central projection 43 in the unheated central zone 59 of the Isolier stressesteils 16.
  • this radiant heater sensor loop 30 is made of the same material as that of the FIGS. 1 and 2 , It has the shape of a quadrangle, which consists of rectilinear peripheral portions which form parallel outgoing connections 41 in the region of the longitudinal center line 44 of the radiator.
  • the lying in the transverse line 45 of the Haupttogetherzone 18 corners 46 of the rectangle lie in corresponding shallow depressions 47 of the insulating outer edge 17, but within the sheet shell rim 15.
  • the peripheral portions 38 thus extend in the form of tendons with a significant distance from the outer edge over large surface sections of the radiator and thus have a lying in the region of the heating zone 18 effective diameter.
  • the sensor loop 30 is thus located on a total of seven locations on the insulator, namely at the corners 46 and 48, at the terminals 41 and, with their inner corners 49 between the square legs 38 a and the connecting portions 39, on the intermediate wall 20.
  • Your Basic form is about that of a stylized fish.
  • FIGS. 5 to 10 schematically shown sensor loop shapes corresponds to the Fig. 9 about the post Fig. 2 but with straight peripheral portions 37, 38 instead of in Fig. 2 shown arcuate design.
  • the peripheral portions 39 are largely directed radially and not as strongly recapturing as in Fig. 2 .
  • This embodiment has a because of the deviation from the theoretical ideal shape of the circle (or the cup shape) slightly lower expression of the signal levels than Fig. 2 , but is easier. manufacture.
  • FIGS. 5 to 7 The explanations after the FIGS. 5 to 7 are intended for Ein Vietnamese and always jointly operated heating zone 18.
  • the sensor loop 30 in Fig. 5 has the shape of a square with supported on the edge 17 corners 46.
  • the sensor 46 of the temperature monitor 24 projects substantially diagonally across the field defined by the sensor.
  • Fig. 6 is an execution accordingly Fig. 5 but in which the sensor 26 of the temperature monitor 24 is flanked on both sides by straight sections of the sensor loop 30. Behind the free end of the temperature sensor 26, these are connected together. This makes it possible to guide the temperature sensor and the sensor loop in the same plane, which contributes to reducing the height with sufficient electrical distances.
  • Fig. 7 shows a particularly preferred embodiment of the sensor loop 30, which, at a distance from the edge 17 extending, almost a full circle forming peripheral portions 37 which are interrupted only by the parallel led out terminals 41 and cat ears outwardly directed corners 46a, for the necessary support on the outer edge 17 provide.
  • Fig. 8 shows a sensor loop 30 for a two-circuit heater, which lies in the region of the partition wall 20 between the main heating zone 18 and the surrounding additional heating zone 19.
  • the substantially square design similar Fig. 5 The loop is much smaller and extends with the outer corners in the area of Rajhomzone, while the peripheral portions 38a sweep the outer of the Haupttogetherzone 18.
  • Fig. 10 shows an embodiment of a two-circuit radiator, which forms a double loop in contrast to the other radiators, but which is connected in parallel.
  • the shape is that of two nested squares, both of which are connected to the same terminals 41 and have circumferentially spaced peripheral portions only to increase their surface coverage, but electrically form a single loop.
  • the inner of the two loops lies, as in Fig. 8 described on the intermediate wall 20, while the outer loop accordingly Fig. 5 with its corners on the outer edge 80 rests.
  • the relative design solid, but elastic design of the sensor loop also makes it possible to set them safely, for example by snapping into recesses of the edge. A determination by plugging in the insulating material, eg by welded pins, is possible.
  • an alternating electromagnetic field is generated around the wire of the sensor loop 30, whose properties determine the frequency of the resonant circuit.
  • this magnetic field is changed, i. E. the sensor loop is attenuated, whereby the frequency of the resonant circuit 32 changes.
  • This frequency change is evaluated in the pot detection element 36 and, when a preset threshold value is reached, activates one or both of the switches 33, 33a, so that the heating elements 21 are then current-flowed and heated accordingly.
  • Fig. 3 shows the relative frequency response df across the diameter, ie the frequency change df in percent of the maximum frequency change in the measurement as a function of the diameter coverage of the cooking plate and thus the sensor loop through a cooking vessel.
  • the cross section of the radiator 11 is corresponding Fig. 1 indicated.
  • the diagram shows the following: using a conventional sensor coil arranged in the edge 17, the course of the frequency change across the diameter shown as a dotted line 52 would result.
  • the signal value added over the circumference would be practically proportional to the coverage of the perimeter.
  • An exactly centric attached large pot 51a (s. Fig. 1 ) would therefore give a good signal, but a slightly smaller pot despite exactly centric coverage no reasonably usable signal. If, for example, the switching threshold were now substantially less than 50% of the total signal magnitude set, so would the one hand, the signal noise, which is relatively large in such sensors and their arrangement, make a circuit unreliable and on the other could then an eccentric (shifted) pot (see double dashed line 51b in Fig. 2 ) already lead to an undesired activation.
  • Fig. 3 shown by a solid line has two stages, namely the upper stage 54, which corresponds to the large, both heating zones 18, 19 covering pot 51a and the activation of both heating zones 18, 19 and 19 cause a lower stage 55, for example, at 50% of Frequency difference df .
  • the region of this step which corresponds to the diameter of the small pot 51, only the central main heating zone 18 should be switched on alone, while at the left end of the step 55, which indicates the minimum pot diameter for the central heating zone, the signal should drop rapidly.
  • the curve 56 generated by the sensor loop 30 approximates this theoretical ideal curve 53, while it generally has a largely linear course, that is, the signal magnitude is largely proportional to the covered diameter, but contains steps approximating the step shape of the ideal curve , This makes it possible to reliably distinguish large small pots with only one sensor and, above all, to distinguish between a displaced potted pot which is to effect a switch on and a small pail intended to set the central main heating zone in motion.
  • the switching points 57, 58 are shown. At point 57 (signal level S1), only the middle heating zone 18 should be switched on and remain switched on until the switching point 58 (switch 33 "ON"). At switching point 58 (signal size S2), the outer heating zone 19 is then switched on (both switches 33 and 33a "ON"). In other words, the switching point 58 symbolizes the smallest size of the large pot 51a, which is to work with both heating zones, while the switching point 57 indicates the smallest size of a pot 51, which should still lead to an intervention.
  • Fig. 1 shown cooking vessel 51 is a pot whose diameter corresponds to the central Hauptfilterzone 18. It covers the area of the heating zone 18 and the corresponding area of the sensor loop 30, that is to say mainly the inner circumferential sections 38. This results in a signal level approximately in the area of the first step 55 in the diagram Fig. 3 lies. This signal thus lies between the signal values S1 and S2 indicated there, so that only the central main heating zone 18 is switched on.
  • the cooking operation is either power-controlled or temperature-controlled without any influence from the pot detection and is monitored by the temperature monitor 24, which protects the glass-ceramic plate against overheating.
  • a radiant heater with a pan detection sensor which is not only particularly simple, robust and retrofittable, but also provides a sharp and useable for the circuit in a wide range signal. Above all, this can create several effective areas for pot detection, so that pots of different diameters trigger different heaters. It is possible with a sensor, a true cooking vessel size detection. It would also be possible, albeit with a larger construction cost, to do this e.g. in two-circuit radiators, to achieve with two sensors according to the invention, resulting in both structural and above all functional advantages over an arrangement of two conventional sensors in the outer and intermediate edge.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Cookers (AREA)
  • Resistance Heating (AREA)
  • Control Of Resistance Heating (AREA)
EP99123892A 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung Expired - Lifetime EP0982973B2 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE29724662U DE29724662U1 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
EP03022466A EP1379105A3 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
DE29724774U DE29724774U1 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefäßerkennung

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19603845 1996-02-05
DE19603845A DE19603845B4 (de) 1996-02-05 1996-02-05 Elektrischer Strahlungsheizkörper mit einem aktiven Sensor zur Kochgefäßerkennung
EP97100766A EP0788293B1 (de) 1996-02-05 1997-01-18 Elektrischer Strahlungsheizkörper mit einem aktiven Sensor zur Kochgefässerkennung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP97100766A Division EP0788293B1 (de) 1996-02-05 1997-01-18 Elektrischer Strahlungsheizkörper mit einem aktiven Sensor zur Kochgefässerkennung

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP03022466A Division EP1379105A3 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
EP03022466A Division-Into EP1379105A3 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung

Publications (4)

Publication Number Publication Date
EP0982973A2 EP0982973A2 (de) 2000-03-01
EP0982973A3 EP0982973A3 (de) 2000-05-03
EP0982973B1 EP0982973B1 (de) 2004-03-31
EP0982973B2 true EP0982973B2 (de) 2009-02-11

Family

ID=7784387

Family Applications (3)

Application Number Title Priority Date Filing Date
EP99123892A Expired - Lifetime EP0982973B2 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
EP03022466A Withdrawn EP1379105A3 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
EP97100766A Expired - Lifetime EP0788293B1 (de) 1996-02-05 1997-01-18 Elektrischer Strahlungsheizkörper mit einem aktiven Sensor zur Kochgefässerkennung

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP03022466A Withdrawn EP1379105A3 (de) 1996-02-05 1997-01-18 Sensor zur Kochgefässerkennung
EP97100766A Expired - Lifetime EP0788293B1 (de) 1996-02-05 1997-01-18 Elektrischer Strahlungsheizkörper mit einem aktiven Sensor zur Kochgefässerkennung

Country Status (6)

Country Link
US (1) US5893996A (ja)
EP (3) EP0982973B2 (ja)
JP (1) JPH09223572A (ja)
AT (2) ATE204114T1 (ja)
DE (3) DE19603845B4 (ja)
ES (2) ES2162136T3 (ja)

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EP0788293A2 (de) 1997-08-06
EP0982973A2 (de) 2000-03-01
DE59711476D1 (de) 2004-05-06
ES2218941T5 (es) 2009-06-01
DE19603845A1 (de) 1997-08-07
ES2162136T3 (es) 2001-12-16
EP1379105A3 (de) 2004-11-03
US5893996A (en) 1999-04-13
ES2218941T3 (es) 2004-11-16
DE19603845B4 (de) 2010-07-22
EP0982973A3 (de) 2000-05-03
ATE263475T1 (de) 2004-04-15
EP1379105A2 (de) 2004-01-07
EP0788293B1 (de) 2001-08-08
EP0788293A3 (de) 1998-01-07
JPH09223572A (ja) 1997-08-26
ATE204114T1 (de) 2001-08-15
EP0982973B1 (de) 2004-03-31
DE59704217D1 (de) 2001-09-13

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