EP0941828A2 - Liquid dispersing and suction device - Google Patents

Liquid dispersing and suction device Download PDF

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Publication number
EP0941828A2
EP0941828A2 EP99810124A EP99810124A EP0941828A2 EP 0941828 A2 EP0941828 A2 EP 0941828A2 EP 99810124 A EP99810124 A EP 99810124A EP 99810124 A EP99810124 A EP 99810124A EP 0941828 A2 EP0941828 A2 EP 0941828A2
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EP
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Prior art keywords
container
generating
pressure
filter element
containers
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Granted
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EP99810124A
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German (de)
French (fr)
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EP0941828B1 (en
EP0941828A3 (en
Inventor
Wolfgang Erdt
Peter Ostermeier
Peter Roth
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Hilti AG
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Hilti AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work

Definitions

  • the invention relates to a suction and discharge device for a rinsing liquid according to the Preamble of claim 1.
  • Flushing liquids are used for the machining of Rock, concrete, masonry or similar materials to cool a tool and that remove drilling cuttings removed from the tool from the machining point.
  • a suction and discharge device from EP-0 776 627 known, which has two closed containers, with a smaller container in a larger container is arranged.
  • the larger container works with one device to create a vacuum together. With the help of this vacuum leaves drilling fluid mixed with cuttings through a suction device to the second Feed the container.
  • In the second container there is clean rinsing liquid by means of a device for generating an overpressure and a discharge device can be fed to a processing point. Because the two containers have a limited size have, is the ongoing filling of the smaller one during the machining process Container and emptying the larger container necessary.
  • the invention has for its object a suction and discharge device for a rinsing liquid to create that related to the whole editing process brings time advantages and is also easy to use.
  • the device according to the invention thus acts as a treatment device for the rinsing liquid by using the first container to deposit the cuttings and the second container thanks the line connecting the containers is continuously supplied with rinsing liquid, which via the discharge device is fed to the processing point. A continuous filling and There is no need to empty the container.
  • the device for generating the excess pressure is preferably in the container connecting line arranged the device for generating the excess pressure.
  • the device for generating the positive pressure creates a negative pressure in that Section of the line which is arranged in the flow direction in front of this device.
  • rinsing liquid is sucked out of the first container and the Device for generating the excess pressure supplied. So when sucking in Rinsing liquid from the first container does not remove the cuttings that have accumulated on the bottom can get into the second container, is advantageously that in the direction of flow the device for generating the excess pressure lying part of the line as from one Bottom of the first container spaced riser formed.
  • a particularly good filter effect is achieved if preferably the largest Extent of the pores of the filter element is 0.1 ⁇ m to 10 ⁇ m.
  • any Drill debris mainly deposits only on the outer contour of the filter element preferably the size of the pores in the direction of flow.
  • the filter element is expediently made of ceramic educated.
  • a very good suction power is achieved in that the device is advantageous generates a pressure of -0.1 to -1 bar to generate the negative pressure.
  • the device for generating an overpressure advantageously generates a pressure from 1 to 5 bar. With this pressure, the rinsing liquid can flow well from the first to the second Container and from this through the filter element into the discharge device reach.
  • the invention is based on a drawing in which a suction and discharge device for a Rinsing liquid is shown schematically, explained in more detail.
  • the device has two containers 1, 2, each of which is closed with a lid 11, 21.
  • the first container 1 is provided with a device 6 for generating a negative pressure Connection that creates a negative pressure in the first container 1.
  • this Vacuum is mixed with drilling fluid rinsing liquid, for example in the Drilling holes in hard surfaces such as concrete, stone, masonry or The like occurs via a suction device 3 in the area of a processing point sucked in and fed to the first container 1.
  • a suction device 3 in the area of a processing point sucked in and fed to the first container 1.
  • the first container 1 that can Separate the cuttings from the dirty washing liquid by gravity and on Collect the bottom 12 of the first container 1.
  • the rinsing liquid which may still contain drilling dust, is passed through one of the two Container 1, 2 connecting line 5 and a device arranged in line 5 7 for generating an overpressure in the second container 2. So that the bottom 12th cuttings from the first container 1 cannot get into the second container 2, is the part of the line 5 projecting into the first container 1 as from the bottom 12 spaced riser formed.
  • a filter element having pores is located on the lid 21 of the second container 2 8 through the rinsing liquid into the discharge device 4 in the form of a line and got back to the processing point. Anything in the rinsing liquid Cuttings stick to the outside of the filter element 8 and only the clean one Flushing liquid gets into the discharge device 4.
  • rinsing liquid does not come from a pressure of, for example, 3 bar second container 2 gets into the first container, can be in line 5, for example in the flow direction in front of the device 7 for generating a negative pressure a check valve, not shown.
  • the device 6 for generating the negative pressure is used, for example, by a Vacuum pump or a suction pump formed.
  • the device 7 for generating the Overpressure is, for example, a self-priming impeller pump that works with a separate drive cooperates in the form of an electric motor.
  • the device 7 for generating the excess pressure and the device for Generation of the vacuum to be driven together with a single electric motor.

Abstract

One (1) of the at least two air tight and watertight enclosed containers has a vacuum generator (6), and suction appliance (3). The second container (2) has an appliance (7) for producing excess pressure, and is connected to a discharge appliance (4). The two containers are joined by a pipe (5). The second container contains a ceramic filter element (8) with pores in.

Description

Die Erfindung betrifft ein Saug- und Austraggerät für eine Spülflüssigkeit gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a suction and discharge device for a rinsing liquid according to the Preamble of claim 1.

Spülflüssigkeiten, vorzugsweise Wasser, dienen bei der abtragenden Bearbeitung von Gestein, Beton, Mauerwerk oder dgl. Materialien dazu, ein Werkzeug zu kühlen und das vom Werkzeug abgetragene Bohrklein von der Bearbeitungsstelle zu entfernen. Zum Entfernen der mit Bohrklein versetzten Spülflüssigkeit und zum Zuführen von sauberer Spülflüssigkeit zur Bearbeitungsstelle ist aus der EP-0 776 627 ein Saug- und Austraggerät bekannt, das zwei geschlossene Behälter aufweist, wobei ein kleinerer Behälter in einem grösseren Behälter angeordnet ist. Der grössere Behälter wirkt mit einer Einrichtung zur Erzeugung eines Unterdruckes zusammen. Mit Hilfe dieses Unterdruckes lässt sich mit Bohrklein versetzte Spülflüssigkeit durch eine Ansaugvorrichtung dem zweiten Behälter zuführen. In dem zweiten Behälter befindet sich saubere Spülflüssigkeit, die mittels einer Einrichtung zur Erzeugung eines Überdruckes und einer Austragvorrichtung einer Bearbeitungsstelle zuführbar ist. Da die beiden Behälter eine begrenzte Baugrösse haben, ist während des Bearbeitungsvorganges ein laufendes Füllen des kleineren Behälters und Entleeren des grösseren Behälters notwendig. Diese Massnahmen wirken sich nicht nur vom zeitlichen Aufwand sondern auch von der Handhabung her nachteilig aus.Flushing liquids, preferably water, are used for the machining of Rock, concrete, masonry or similar materials to cool a tool and that remove drilling cuttings removed from the tool from the machining point. To the Remove the drilling fluid with drilling cuttings and add clean Rinsing liquid to the processing point is a suction and discharge device from EP-0 776 627 known, which has two closed containers, with a smaller container in a larger container is arranged. The larger container works with one device to create a vacuum together. With the help of this vacuum leaves drilling fluid mixed with cuttings through a suction device to the second Feed the container. In the second container there is clean rinsing liquid by means of a device for generating an overpressure and a discharge device can be fed to a processing point. Because the two containers have a limited size have, is the ongoing filling of the smaller one during the machining process Container and emptying the larger container necessary. These measures work not only disadvantageous in terms of time expenditure but also in terms of handling out.

Der Erfindung liegt die Aufgabe zugrunde, ein Saug- und Austraggerät für eine Spülflüssigkeit zu schaffen, das im Zusammenhang mit dem gesamten Bearbeitungsvorgang zeitliche Vorteile bringt und zudem einfach in der Handhabung ist.The invention has for its object a suction and discharge device for a rinsing liquid to create that related to the whole editing process brings time advantages and is also easy to use.

Die Lösung dieser Aufgabe erfolgt durch ein Saug- und Austraggerät, welches die im kennzeichnenden Abschnitt des Patentanspruchs 1 angeführten Merkmale aufweist. This problem is solved by a suction and discharge device, which in the characterizing section of claim 1 has features.

Das erfindungsgemässe Gerät wirkt damit als Aufbereitungsvorrichtung der Spülflüssigkeit indem der erste Behälter dem Absetzen des Bohrkleins dient und der zweite Behälter dank der die Behälter verbindenden Leitung stetig mit Spülflüssigkeit versorgt wird, welche über die Austragvorrichtung der Bearbeitungsstelle zugeführt wird. Ein laufendes Füllen und Entleeren der Behälter entfällt damit.The device according to the invention thus acts as a treatment device for the rinsing liquid by using the first container to deposit the cuttings and the second container thanks the line connecting the containers is continuously supplied with rinsing liquid, which via the discharge device is fed to the processing point. A continuous filling and There is no need to empty the container.

Um eine bestimmte Strömungsgeschwindigkeit der Spülflüssigkeit innerhalb der die Behälter verbindenden Leitung erreichen zu können, ist vorzugsweise in der die Behälter verbindenden Leitung die Einrichtung zur Erzeugung des Überdruckes angeordnet.To a certain flow rate of the rinsing liquid within the To be able to reach the container connecting line is preferably in the container connecting line arranged the device for generating the excess pressure.

Die Einrichtung zur Erzeugung des Überdruckes erzeugt einen Unterdruck in jenem Abschnitt der Leitung, die in Strömungsrichtung vor dieser Einrichtung angeordnet ist. Mit Hilfe dieses Unterdruckes wird Spülflüssigkeit aus dem ersten Behälter angesaugt und der Einrichtung zur Erzeugung des Überdruckes zugeführt. Damit beim Ansaugen der Spülflüssigkeit aus dem ersten Behälter das sich am Boden angesammelte Bohrklein nicht in den zweiten Behälter gelangen kann, ist vorteilhafterweise der in Strömungsrichtung vor der Einrichtung zur Erzeugung des Überdruckes liegende Teil der Leitung als von einem Boden des ersten Behälters beabstandete Steigleitung ausgebildet.The device for generating the positive pressure creates a negative pressure in that Section of the line which is arranged in the flow direction in front of this device. With With the help of this negative pressure, rinsing liquid is sucked out of the first container and the Device for generating the excess pressure supplied. So when sucking in Rinsing liquid from the first container does not remove the cuttings that have accumulated on the bottom can get into the second container, is advantageously that in the direction of flow the device for generating the excess pressure lying part of the line as from one Bottom of the first container spaced riser formed.

Um ausreichend saubere Spülflüssigkeit der Austragvorrichtung zuführen zu können, ist zur weiteren Abtrennung von Bohrklein aus der Spülflüssigkeit zweckmässigerweise in dem zweiten Behälter in Strömungsrichtung vor der Austragvorrichtung ein Poren aufweisendes Filterelement angeordnet.In order to be able to supply sufficiently clean rinsing liquid to the discharge device for further separation of cuttings from the rinsing liquid, conveniently in the second container in the flow direction in front of the discharge device having pores Filter element arranged.

Eine besonders gute Filterwirkung wird erreicht, wenn vorzugsweise die grösste Erstreckung der Poren des Filterelementes 0,1 µm bis 10 µm beträgt.A particularly good filter effect is achieved if preferably the largest Extent of the pores of the filter element is 0.1 µm to 10 µm.

Damit die Spülflüssigkeit das Filterelement gut durchsetzen kann und damit sich allfälliges Bohrklein hauptsächlich nur an der Aussenkontur des Filterelementes ablagert, nimmt vorzugsweise die Grösse der Poren in Strömungsrichtung zu.So that the rinsing liquid can penetrate the filter element well and thus any Drill debris mainly deposits only on the outer contour of the filter element preferably the size of the pores in the direction of flow.

Aus Gründen der guten Haltbarkeit ist zweckmässigerweise das Filterelement aus Keramik gebildet.For reasons of good durability, the filter element is expediently made of ceramic educated.

Eine sehr gute Saugleistung wird dadurch erreicht, dass vorteilhafterweise die Einrichtung zur Erzeugung des Unterdruckes einen Druck von -0,1 bis -1 bar erzeugt. A very good suction power is achieved in that the device is advantageous generates a pressure of -0.1 to -1 bar to generate the negative pressure.

Vorteilhafterweise erzeugt die Einrichtung zur Erzeugung eines Überdruckes einen Druck von 1 bis 5 bar. Mit diesem Druck kann die Spülflüssigkeit gut vom ersten in den zweiten Behälter und von diesem durch das Filterelement hindurch in die Austragvorrichtung gelangen.The device for generating an overpressure advantageously generates a pressure from 1 to 5 bar. With this pressure, the rinsing liquid can flow well from the first to the second Container and from this through the filter element into the discharge device reach.

Um beispielsweise platzsparend bauen zu können, ist einem weiteren Vorschlag der Erfindung entsprechend der zweite Behälter gegenüber dem ersten Behälter kleiner ausgebildet als der erste Behälter 1 und innerhalb des ersten Behälters angeordnet. Beide Behälter sind auch in dieser Anordnung über eine Leitung miteinander verbunden.In order to be able to build in a space-saving manner, for example, another proposal is the Invention corresponding to the second container smaller than the first container formed as the first container 1 and arranged within the first container. Both Containers are also connected to one another in this arrangement via a line.

Die Erfindung wird anhand einer Zeichnung, in der ein Saug- und Austraggerät für eine Spülflüssigkeit schematisch dargestellt ist, näher erläutert.The invention is based on a drawing in which a suction and discharge device for a Rinsing liquid is shown schematically, explained in more detail.

Das Gerät weist zwei Behälter 1, 2 auf, die mit je einem Deckel 11, 21 verschlossen sind. Der erste Behälter 1 steht mit einer Einrichtung 6 zur Erzeugung eines Unterdruckes in Verbindung, die in dem ersten Behälter 1 einen Unterdruck erzeugt. Mit Hilfe dieses Unterdruckes wird mit Bohrklein versetzte Spülflüssigkeit, das beispielsweise bei der Erzeugung von Bohrungen in harten Untergründen wie Beton, Gestein, Mauerwerk oder dergleichen entsteht, über eine Ansaugvorrichtung 3 im Bereich einer Bearbeitungsstelle angesaugt und dem ersten Behälter 1 zugeführt. In dem ersten Behälter 1 kann sich das Bohrklein durch die Schwerkraft aus der schmutzigen Spülflüssigkeit absondern und am Boden 12 des ersten Behälters 1 ansammeln.The device has two containers 1, 2, each of which is closed with a lid 11, 21. The first container 1 is provided with a device 6 for generating a negative pressure Connection that creates a negative pressure in the first container 1. With the help of this Vacuum is mixed with drilling fluid rinsing liquid, for example in the Drilling holes in hard surfaces such as concrete, stone, masonry or The like occurs via a suction device 3 in the area of a processing point sucked in and fed to the first container 1. In the first container 1 that can Separate the cuttings from the dirty washing liquid by gravity and on Collect the bottom 12 of the first container 1.

Die allfällig noch mit Bohrstaub versetzte Spülflüssigkeit gelangt mittels einer die beiden Behälter 1, 2 verbindenden Leitung 5 und einer in der Leitung 5 angeordneten Einrichtung 7 zur Erzeugung eines Überdruckes in den zweiten Behälter 2. Damit das am Boden 12 des ersten Behälters 1 liegende Bohrklein nicht in den zweiten Behälter 2 gelangen kann, ist der in den ersten Behälter 1 ragende Teil der Leitung 5 als von dem Boden 12 beabstandete Steigleitung ausgebildet.The rinsing liquid, which may still contain drilling dust, is passed through one of the two Container 1, 2 connecting line 5 and a device arranged in line 5 7 for generating an overpressure in the second container 2. So that the bottom 12th cuttings from the first container 1 cannot get into the second container 2, is the part of the line 5 projecting into the first container 1 as from the bottom 12 spaced riser formed.

An dem Deckel 21 des zweiten Behälters 2 befindet sich ein Poren aufweisendes Filterelement 8 durch das Spülflüssigkeit in die Austragvorrichtung 4 in Form einer Leitung und zurück an die Bearbeitungsstelle gelangt. Allfälliges in der Spülflüssigkeit befindliches Bohrklein bleibt dabei an der Aussenseite des Filterelementes 8 haften und nur die saubere Spülflüssigkeit gelangt in die Austragvorrichtung 4. A filter element having pores is located on the lid 21 of the second container 2 8 through the rinsing liquid into the discharge device 4 in the form of a line and got back to the processing point. Anything in the rinsing liquid Cuttings stick to the outside of the filter element 8 and only the clean one Flushing liquid gets into the discharge device 4.

Damit die Spülflüssigkeit nicht aus dem mit einem Druck von beispielsweise 3 bar beaufschlagten zweiten Behälter 2 in den ersten Behälter gelangt, kann sich in der Leitung 5, beispielsweise in Strömungsrichtung vor der Einrichtung 7 zur Erzeugung eines Unterdruckes ein nicht dargestelltes Rückschlagventil befinden.So that the rinsing liquid does not come from a pressure of, for example, 3 bar second container 2 gets into the first container, can be in line 5, for example in the flow direction in front of the device 7 for generating a negative pressure a check valve, not shown.

Die Einrichtung 6 zur Erzeugung des Unterdruckes wird beispielsweise von einer Vakuumpumpe oder einer Saugpumpe gebildet. Die Einrichtung 7 zur Erzeugung des Überdruckes ist beispielsweise eine selbstansaugende Impellerpumpe, die mit einem gesondertem Antrieb in Form eines Elektromotors zusammenwirkt. Es ist beispielsweise auch möglich, die Einrichtung 7 zur Erzeugung des Überdruckes und die Einrichtung zur Erzeugung des Unterdruckes gemeinsam mit einem einzigen Elektromotor anzutreiben.The device 6 for generating the negative pressure is used, for example, by a Vacuum pump or a suction pump formed. The device 7 for generating the Overpressure is, for example, a self-priming impeller pump that works with a separate drive cooperates in the form of an electric motor. For example it is also possible, the device 7 for generating the excess pressure and the device for Generation of the vacuum to be driven together with a single electric motor.

Claims (9)

Saug- und Austraggerät für eine Spülflüssigkeit, die bei der abtragenden Bearbeitung von Gestein, Beton, Mauerwerk oder dergleichen verwendet wird, mit wenigstens zwei luft- und flüssigkeitsdicht abgeschlossenen Behältern (1, 2), von denen ein erster Behälter (1) mit einer Einrichtung (6) zur Erzeugung eines Unterdruckes sowie mit einer Ansaugvorrichtung (3) zusammenwirkt und ein zweiter Behälter (2) mit einer Einrichtung (7) zur Erzeugung eines Überdruckes sowie mit einer Austragvorrichtung (4) in Verbindung steht, dadurch gekennzeichnet, dass eine beide Behälter (1, 2) verbindende Leitung (5) vorgesehen ist.Suction and discharge device for a rinsing liquid, which is used in the machining of stone, concrete, masonry or the like, with at least two airtight and liquidtight containers (1, 2), of which a first container (1) with a device (6) for generating a negative pressure and interacts with a suction device (3) and a second container (2) is connected to a device (7) for generating an excess pressure and to a discharge device (4), characterized in that one of the two containers (1, 2) connecting line (5) is provided. Gerät nach Anspruch 1, dadurch gekennzeichnet, dass die beide Behälter (1, 2 verbindende Leitung (5)) die Einrichtung (7) zur Erzeugung des Überdruckes aufweist.Device according to claim 1, characterized in that the two containers (1, 2 connecting line (5)) the device (7) for generating the excess pressure having. Gerät nach Anspruch 2, dadurch gekennzeichnet, dass der in Strömungsrichtung vor der Einrichtung (7) zur Erzeugung des Überdruckes liegende Teil der Leitung (5) als von einem Boden (12) des ersten Behälters (1) beabstandete Steigleitung ausgebildet ist.Device according to claim 2, characterized in that the flow direction part of the line lying in front of the device (7) for generating the excess pressure (5) as a riser spaced from a bottom (12) of the first container (1) is trained. Gerät nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass in dem zweiten Behälter (2) in Strömungsrichtung vor der Austragvorrichtung (4) ein Poren aufweisendes Filterelement (8) angeordnet ist.Device according to claim 1 or 3, characterized in that in the second Container (2) in the flow direction in front of the discharge device (4) has a pore Filter element (8) is arranged. Gerät nach Anspruch 4, dadurch gekennzeichnet, dass die grösste Erstreckung der Poren des Filterelementes (8) 0,1 µm bis 10 µm beträgt.Device according to claim 4, characterized in that the greatest extent the pores of the filter element (8) is 0.1 µm to 10 µm. Gerät nach Anspruch 5, dadurch gekennzeichnet, dass die Grösse der Poren in Strömungsrichtung zunimmt.Apparatus according to claim 5, characterized in that the size of the pores in Flow direction increases. Gerät nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Filterelement (8) aus Keramik gebildet ist.Device according to one of claims 4 to 6, characterized in that the Filter element (8) is made of ceramic. Gerät nach einem der Ansprüche 1 bis 7, dadurch gekennnzeichnet, dass die Einrichtung (6) zur Erzeugung des Unterdruckes einen Druck von -0,1 bis -1 bar erzeugt. Device according to one of claims 1 to 7, characterized in that the Device (6) for generating the negative pressure a pressure of -0.1 to -1 bar generated. Gerät nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Einrichtung (7) zur Erzeugung des Überdruckes einen Druck von 1 bis 5 bar erzeugt.Device according to one of claims 1 to 7, characterized in that the device (7) generates a pressure of 1 to 5 bar to generate the excess pressure.
EP99810124A 1998-03-13 1999-02-12 Liquid dispersing and suction device Expired - Lifetime EP0941828B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19810912A DE19810912A1 (en) 1998-03-13 1998-03-13 Suction and discharge device for a rinsing liquid
DE19810912 1998-03-13

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EP0941828A2 true EP0941828A2 (en) 1999-09-15
EP0941828A3 EP0941828A3 (en) 2002-01-16
EP0941828B1 EP0941828B1 (en) 2004-08-04

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US (1) US6126822A (en)
EP (1) EP0941828B1 (en)
JP (1) JP4080626B2 (en)
AT (1) ATE272477T1 (en)
CA (1) CA2262304C (en)
DE (2) DE19810912A1 (en)
ES (1) ES2224582T3 (en)

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EP1193026A1 (en) * 2000-09-04 2002-04-03 HILTI Aktiengesellschaft Cooling and flushing device for stone-working tools
EP1386706A1 (en) * 2002-07-29 2004-02-04 HILTI Aktiengesellschaft Installation for cleaning rinsing liquids
EP2335897A1 (en) * 2009-12-18 2011-06-22 HILTI Aktiengesellschaft Device for preparing a cooling and washing liquid and control method for a preparation device
EP2335895A1 (en) * 2009-12-18 2011-06-22 HILTI Aktiengesellschaft Device and method for preparing a coolant and washing liquid
EP2335896A1 (en) * 2009-12-18 2011-06-22 HILTI Aktiengesellschaft Device for preparing a coolant and washing liquid
WO2013093191A1 (en) * 2011-12-20 2013-06-27 Elematic Oy Ab Method for the removal of dust generated in sawing, a saw blade, and a saw
CN108504339A (en) * 2018-03-26 2018-09-07 中国石油天然气集团有限公司 A kind of water-base drilling fluid and its preparation method and application suitable for compact oil reservoir

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DE10252194A1 (en) * 2002-11-09 2004-05-27 Hilti Ag Portable drilling water filter with self-cleaning
JP2005145041A (en) * 2003-10-23 2005-06-09 Ishihara Kikai Kogyo Kk Non-core type bit, non-core drill device and cooling water supplying/discharging method therefor
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DE59910089D1 (en) 2004-09-09
ES2224582T3 (en) 2005-03-01
US6126822A (en) 2000-10-03
EP0941828B1 (en) 2004-08-04
ATE272477T1 (en) 2004-08-15
CA2262304C (en) 2004-08-17
DE19810912A1 (en) 1999-09-16
JP4080626B2 (en) 2008-04-23
EP0941828A3 (en) 2002-01-16
JPH11311083A (en) 1999-11-09
CA2262304A1 (en) 1999-09-13

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