EP0996355B1 - Staubsauger mit trennung von abfällen durch tangentialstrom - Google Patents

Staubsauger mit trennung von abfällen durch tangentialstrom Download PDF

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Publication number
EP0996355B1
EP0996355B1 EP99922222A EP99922222A EP0996355B1 EP 0996355 B1 EP0996355 B1 EP 0996355B1 EP 99922222 A EP99922222 A EP 99922222A EP 99922222 A EP99922222 A EP 99922222A EP 0996355 B1 EP0996355 B1 EP 0996355B1
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EP
European Patent Office
Prior art keywords
tube
screw
air
vacuum cleaner
waste
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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
EP99922222A
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English (en)
French (fr)
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EP0996355A1 (de
Inventor
Roland Dubos
Vincent Fleurier
Marc Thery
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SEB SA
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SEB SA
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1608—Cyclonic chamber constructions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/102—Dust separators
    • A47L9/104—Means for intercepting small objects
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1683—Dust collecting chambers; Dust collecting receptacles

Definitions

  • the present invention relates to a waste collection device aimed at equip a vacuum cleaner.
  • vacuum cleaners provided with so-called filtration means cyclonic, especially in the industrial field.
  • Such devices reduce the frequency of intervention on the filters located in downstream of said means, failing to always be able to completely dispense with them. They act as real pre-filters.
  • this pre-filtration is efficient, i.e. having the capacity to collect particles of small size, the less the frequency of change of filters located downstream big. This results in more constant suction conditions over time and therefore more favorable both to the life of the engine and to the efficiency of dusting.
  • the air is introduced into a tube which contains a screw positioned, in the axis of the tube, at one end of the latter, called entry or injection. It has a notably outer diameter smaller than the diameter of the inner wall of the tube (from 20 to 60% smaller). Its role is to rotate the air and centrifuge the solid particles to press them on said internal wall.
  • a vacuum cleaner comprising a separation device comprising a paddle wheel within a separation chamber, said wheel, rotated by the air flow generated by the fan motor unit of the vacuum cleaner, causing a cyclone to separate the waste collected by a conduit surrounding a second tube in connection with the discharge end of the first tube and connected to the suction unit.
  • a rotating member can be a source of wheel blockage or waste between the wheel and the chamber support of said wheel.
  • the present invention relates to a pre-filtration device applied to household area which offers the same advantages in terms of result and filtration quality as previously described devices, while reducing the size, and limiting the pressure losses.
  • Waste filtration at the gap between the second and the third tube proves to be effective, significantly extending the life of the filter without risk of damaging the motor of the suction unit or backing up on the outside it looks still stale.
  • the additional flow is generated by the same suction group as the main flow by means of a bypass in the air circuit.
  • This first embodiment is a simple and economical means of carrying out the invention since it requires only the use of a single suction group.
  • the additional flow used for the discharge of dusty air is generated independently of the flow main, this additional flow must be maintained, by means of a second group suction, for example preferably at a value corresponding to 20% (of 5% to 30%) of that of the main flow.
  • the second conduit outlet is short and leads directly into a dust container airtight whose air outlet is supplemented with a coarse charged filter to retain waste previously centrifuged and separated from the air flow main.
  • the secondary discharge flow is then mainly due to energy kinetics acquired upstream by the particles, sufficient for transport to the adjacent receptacle. Since the air movements are less turbulent in this area than they are in the upstream circuit, a storage can be operated.
  • This embodiment has the advantage of not be expensive and stay small.
  • the second tube comprises preferably lateral openings close to its inlet end. These openings allow an air flow to be obtained in the area located between the two tubes, which is helical, not just rotational, of so that the light and bulky waste continues to run in the receptacle away from the discharge ports (side holes and central). In this embodiment, the waste falling by gravity into the receptacle provided for this purpose, it will advantageously be placed in part device. An opening is then provided in the third tube in its wall towards the receptacle so that the space formed between the second and third tube is in connection with the internal volume of the receptacle.
  • the screw only has a thread, with no central core which could constitute a point of attachment. It may nevertheless include several nets if you plan to perform a prior centrifugation to place the waste on the side walls of the tube.
  • this screw has several steps, always decreasing along the air circuit, from upstream to downstream, for two main reasons: first is to gradually bring the air to wind along the screw which has the effect of greatly limiting the pressure drops in its passage; the second is to limit the risks of blockage of the vein (s).
  • the smallest cross-section of the screw must also correspond to the most restricted section of passage that can be found upstream of the device, usually in the squeegee, so that the rigid waste which cross this first obstacle are not blocked in the screw.
  • the length of the screw must be sufficient for the operation of centrifugation is carried out correctly, notwithstanding variations in flow created by the restrictions of the air passage section in the area of crevice induced by, on the one hand, the back and forth movement printed by the user of the nozzle, and, on the other hand, the nature of the soils to dusting (carpets, smooth floors ). If the flow drop is too great, for example in the case where the nozzle is completely blocked, case inevitably very infrequent in use, we must plan just upstream of the device a valve which opens the circuit on the outside in case of too strong depressurization keeping the flow at a suitable minimum level.
  • Figure 1a appears a current line (100), first helical descending along the wall of a frustoconical shell (101), which rises then along the central axis of a delivery tube (103).
  • the system is preferentially arranged so that the receptacle is located in the lower part of the device. The air at the outlet is only loaded with fine particles which are further processed in downstream, if the application requires it.
  • the air intake takes place through the axis of the main tube (104) at a end of the latter.
  • the flow becomes helical, effectively projecting the solid particles (108) onto the inner wall of the tube (104).
  • the screw (105) is exceeded, the air flow splits in two branches, the first leads a dusted air towards the delivery tube main (106), the second evacuates the dust-laden air through the orifice secondary discharge (107).
  • Figure 2a shows a complete suction chain. Following the circuit air flow, air enters through the squeegee (1), then into the extensions (2, 3), continues in the handle (4), then in the hose (5), to reach in the frame (6) where is usually placed the waste recovery bag.
  • Figure 2b shows a device according to the invention inspired by a device "GD” but transformed so that it can be mounted in a vacuum cleaner, making the object of the present invention in the first embodiment. It needs the use of two separate suction sources noted on the drawing (M1) and (M2).
  • the "dirty" air discharged through the annex orifice (30) is treated by a filter (31) located downstream between said orifice and the motor (M2) after a certain time of operation. It is preferable indeed to prevent the dusty air from comes into contact with the turbine and / or the active parts, in particular electric, motor.
  • Figure 2c shows the second embodiment. As stated more at the top the two delivery circuits meet further downstream, constituting thus the derivation mentioned above. This configuration does requires more use than a single suction unit designated in the drawing with the letter (M). However, after a certain period of operation, the flow in the branch treating dusty air, thus comprising the filter, can no longer be sufficient to ensure optimum efficiency of the device (in due to clogging of said filter).
  • the device, object of the present invention a diagram of which is presented in FIG. 2d in its third embodiment, can be arranged at a place any of this chain.
  • a filter (12) must be placed downstream for the treatment of fine waste. It can, as in the figure, be placed in the body of the device. It can be in the form of a paper or textile bag classic, flat or pleated filter ...
  • Figures 3 and 4 show the device object of the present invention in its third embodiment. Specific aspects of this version concern the absence of an additional discharge circuit and therefore the presence of the waste collection tank as well as the installation of side holes on the delivery tube. All that is part of the following description, except the two aforementioned points, however is common to the three versions
  • the tubes (8a, 8b) contain, in the same central axis, respectively the so-called separating screw (11) and the delivery tube (9)
  • AT a distance (A) from the screw (11), corresponding to approximately 5 to 20% of the diameter internal (K) of the tube (8a) is disposed the delivery tube (9).
  • This distance (A) must be sufficient to prevent all waste from being sent to the discharge tube (9), but must not exceed a value for which the separated waste recombines at the outlet of the first tube (8a), before entering the second tube (9). Tangential separation being dependent of the internal diameter (K) of the tube (8a), the distance (A) is given in a fraction of this diameter.
  • the diameter of the delivery tube (9) is also optimized: it does not must not considerably exceed that of the tube (8a) in order to keep the effect of separation of waste induced by screw (11) and must not be excessively too small compared to the inlet diameter of the tube (8a), so that a restriction too high a section will generate a significant pressure drop during the passage of air through the device.
  • the preferred diameter of the second tube (9) is between 70% and 100% of the smallest internal diameter of the tube (8a), noted (L).
  • the air, partially freed of its waste, leaves in the extension of the tube (9) by the evacuation tube (14).
  • the tube (8b) covers over a length (E) + (H) + (G) the delivery tube (9) and comprises therefore an opening (17) over a length (D).
  • the distance (D) is chosen to be greater than 20% of the diameter internal (K) of the tube (8a).
  • this opening (17) always preferably greater than 20% of the internal diameter (K) of the tube (8a), leads to the waste receptacle (10).
  • a distance (B) is advantageously provided so that the most bulky waste does not obstruct the conduit by tamping. This distance is preferably at least equal to 10% of the internal diameter (K) of the tube (8a).
  • a side opening (16) is created in the delivery tube (9). This opening makes it possible to preserve helical current lines, necessary for the transport of solid particles from the outlet of the screw (11) to the opening (17) which communicates with the receptacle (10), while facilitating the discharge of the air.
  • the section of this opening is equivalent to X% (X varying from 50 to 150) of the internal section of the delivery tube (9).
  • This zone is located at a distance (G) from the end of the tube (9), and extends over a distance (H), depending on the nature of the opening made.
  • a distance (E), preferably greater than one and a half times the internal diameter of the delivery tube (9) separates the end of the covering rib (15), extension of the tube (8a) and the end of the opening (16).
  • the distance (C), defining the height of the dust container must correspond to at least 150% of the internal diameter (K) of the tube (8a). If this distance is not respected, the waste receptacle becomes the seat of a turbulent flow which is not conducive to storage of waste in this area, in particular bulky waste and light. If, however, we want to keep a compact set, limiting in particular this distance (C), as in the example proposed, wish can be motivated by hygiene considerations (creation of a small volume storage area, which the user must empty after each use), we can insert on the flow path, in the area (17), a grid (22) which retains bulky and light waste.
  • This grid (22) is preferably very wide mesh and integral with the dust receptacle to facilitate the emptying operation of the receptacle (10).
  • the separation screw (11), shown in Figure 6, is designed to limit the pressure losses in its passage and avoid any jamming phenomenon and / or for hanging up fibrous waste.
  • the pitch of the screw is variable in order to gradually bring the air to follow the helical shape of the aeraulic vein (s).
  • the air is guided through the screw by means of a propeller comprising two pitches, ⁇ and ⁇ . Progression of the step must always go decrescendo with the directions of the flow. So, in the case of the screw (11) presented in FIG. 6, the pitch ⁇ is greater than the pitch ⁇ .
  • the progression of the screw pitch can be continuous or discontinuous, this the latter, however, is less costly to perform.
  • the section of the vein must always be equal to or greater than the most small passage section located upstream of the device so that the waste rigid the largest which could cross this first obstacle cannot be lock in the screw.
  • this screw has only one propeller to avoid any catching area near the axis of the screw (11). We can nevertheless consider that it includes several on the condition that one prior centrifugation, carried out by other means takes place upstream.
  • the propeller AT the input (13) of the device, the propeller must not have any stops contained in a plane perpendicular to the axis of the screw (11), to avoid any potential area hooking.
  • the propeller near the entrance (13), takes its origin along the inner wall of the tube (8a) to reach its axis further so that the surface containing the edge (18) forms a slight angle with the axis of the screw (11), at most 45 °. The waste rather than settling there comes to slide along this stop (18).
  • FIGS. 8 to 10 An alternative embodiment of the screw (11) is presented in FIGS. 8 to 10. This variant is characterized in that the end of the screw (11) located on the side of the air inlet is partially blocked so that the air intake through the screw (11) at this end is made in a substantially tubular channel and does not with no edges.
  • the screw (11) is fixed in a housing by means of a stud (32).
  • the frame housing the filtration system includes a closure (34) condemning part of the end (30) of the screw (11).
  • the leading edges can be softened, so that no obstacle, placed in the offset suction flow, is not likely to retain waste (especially wires and fibers) at the air inlet of the screw.
  • an inclined blade (36) is located at the entry of the screw (11) in order to soften the air intake on the pitch of the screw and limit the pressure losses resulting from the arrival of air on said screw (11)
  • the envelope containing the generator of the screw is not a surface of revolution, which allows save space at the bottom for the engine housing.
  • the screw axis (11) nevertheless remains substantially parallel to the axis of the tube (8a).
  • the length of the screw (11) must finally be sufficient to guarantee efficiency minimum in case of reduced flow operation. This length must preferably correspond to at least 2 times the internal diameter (K) of the tube (8a).
  • This pre-filtration device can be placed in the vacuum cleaner during its factory production, for example in the frame of the device, in position preferential horizontal for a sled type device, or even vertical for a tank or brush type device. Being able to keep pace general body of the vacuum cleaner, not to impose a particular shape on the vacuum cleaner due to the use of the device, allows to reduce overall the size of the device
  • the device for pre-filtration forms an autonomous filtration unit that can be integrated into any point in the ventilation chain of the device by connecting the end inlet of the first tube to the conduit comprising the nozzle (1) connected to the surface to suction and connecting the outlet end of the second tube to the suction circuit of the vacuum cleaner.
  • a filtration accessory like a suction nozzle, which can then be inserted into any vacuum cleaner, without specific equipment, by example at the level of the handle for holding the extensions and the squeegee, or at the level of these extensions, even at the level of the nozzle itself.
  • it then increases the performance and longevity of the majority of waste collection devices without complicated intervention on the device and economically.
  • the invention finds its application in the technical field of vacuum cleaners and waste collection systems.

Claims (16)

  1. Vorrichtung zur Trennung und Sammlung von Abfällen für Abfallsammelgerät vom Typ Staubsauger, insbesondere umfassend eine Sauggruppe, die durch ein Rohr (2, 3, 4), das in einem Sauger (1) endet, mit der zu saugenden Oberfläche verbunden ist, wobei die Vorrichtung einen ersten Stutzen (8a) umfasst, der eine Lufteinlassöffnung (13), welche die aufgesaugte und vom Rohr zugeführte Luft aufnehmen kann, und eine Luftauslassöffnung aufweist, eine Schraube (11), die im Wesentlichen axial in diesem ersten Stutzen (8a) positioniert ist, einen zweiten Stutzen (9), dessen Durchmesser kleiner ist als der Außendurchmesser der Schraube (11) und der koaxial in der Verlängerung des ersten Stutzens (8a) gelegen ist, an einem Ende in Luftverbindung mit dem Auslassende des ersten Stutzens (8a) und an seinem anderen Ende durch eine erste Ausströmungsleitung (14) an der Sauggruppe angeschlossen ist, wobei diese Vorrichtung einen dritten Stutzen (8b) umfasst, der um den zweiten Stutzen (9) angeordnet und mit dem Auslassende des ersten Stutzens (8a) so verbunden ist, dass zwischen dem zweiten und dritten Stutzen (9, 8b) eine zweite Ausströmungsleitung (21) für Abfälle zu einem Filter und/oder einem Auffang (10) entsprechend einem Nebenstrom angebracht ist, dadurch gekennzeichnet, dass der Außendurchmesser der Schraube (11) im Wesentlichen so groß ist wie der Innendurchmesser (K) des ersten Stutzens (8a).
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Ausströmungsleitung (21) mit einer Sauggruppe verbunden ist.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die zweite Ausströmungsleitung (21) durch einen Abzweig mit der Hauptsauggruppe des Staubsaugers verbunden ist.
  4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Nebenstrom in der zweiten Ausströmungsleitung (21) durch eine zweite Sauggruppe zwischen 5% und 30% des Hauptstroms gehalten wird.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Ausströmungsleitung (21) kurz ist und direkt in einen hermetischen Staubauffang (10) mündet, dessen Luftausgang von einem groben Filter (22) ergänzt wird, welcher die Abfälle auffangen soll.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der zweite Stutzen (9) seitliche Öffnungen (16) aufweist, die sich nahe an seinem Eingangsende befinden.
  7. Vorrichtung nach einem der Anspüche 5 und 6, dadurch gekennzeichnet, dass der dritte Stutzen (8b) in seiner Wand in Richtung des Auffangs (10) eine Öffnung (17) aufweist, so dass der zwischen dem zweiten Stutzen (9) und dem dritten Stutzen (8b) angebrachte Zwischenraum an das interne Volumen des Auffangs (10) angeschlossen ist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Schraube (11) keinen mittleren Steg aufweist.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Schraube (11) einen Gang oder mehrere Gänge aufweist.
  10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Steigung mindestens eines der Gänge der Schraube (11) der Länge nach variabel ist.
  11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Ende (30) der Schraube (11), das an der Seite des Lufteinlasses gelegen ist, teilweise verschlossen ist, so dass das Ansaugen der Luft durch die Schraube (11) an diesem Ende entsprechend einem Kanal realisiert wird, der im Wesentlichen röhrenförmig ist und keine Kante besitzt.
  12. Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass ein Abstand (B), der mindestens 10% des inneren Durchmessers (K) des Stutzens (8a) beträgt, zwischen dem zweiten Stutzen (9) und dem dritten Stutzen (8b) angebracht ist.
  13. Vorrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass der zweite Stutzen (9) in einem Abstand (A) zur Schraube (11) liegt, der ungefähr 5% bis 20% des inneren Durchmessers (K) des ersten Stutzens (8a) beträgt.
  14. Vorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Vorrichtung in das Gehäuse (6) des Staubsaugers integriert ist.
  15. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, dass die Vorrichtung im Wesentlichen horizontal im Staubsauger montiert ist.
  16. Vorrichtung nach einem der Ansprüche 5 bis 13, dadurch gekennzeichnet, dass die Vorrichtung ein Staubsaugerzubehör ist, das in den Luftsaugweg eingefügt werden kann, indem das Eingangsende des ersten Stutzens (8a) mit der Leitung, die den Sauger (1) aufweist, welcher mit der zu saugenden Oberfläche verbunden ist, gekoppelt wird und indem das Ausgangsende des zweiten Stutzens (9) mit dem Saugkreis des Staubsaugers verbunden wird.
EP99922222A 1998-05-15 1999-05-12 Staubsauger mit trennung von abfällen durch tangentialstrom Expired - Lifetime EP0996355B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9806422 1998-05-15
FR9806422A FR2778546B1 (fr) 1998-05-15 1998-05-15 Aspirateur a separation tangentielle des dechets
PCT/FR1999/001131 WO1999059458A1 (fr) 1998-05-15 1999-05-12 Aspirateur a separation tangentielle des dechets

Publications (2)

Publication Number Publication Date
EP0996355A1 EP0996355A1 (de) 2000-05-03
EP0996355B1 true EP0996355B1 (de) 2004-08-04

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EP99922222A Expired - Lifetime EP0996355B1 (de) 1998-05-15 1999-05-12 Staubsauger mit trennung von abfällen durch tangentialstrom

Country Status (11)

Country Link
US (1) US6332239B1 (de)
EP (1) EP0996355B1 (de)
CN (1) CN1126500C (de)
AU (1) AU3935199A (de)
BR (1) BR9906376A (de)
DE (1) DE69919106D1 (de)
FR (1) FR2778546B1 (de)
PL (1) PL190193B1 (de)
RU (1) RU2198581C2 (de)
TR (1) TR200000094T1 (de)
WO (1) WO1999059458A1 (de)

Cited By (3)

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US8186006B2 (en) 2007-07-19 2012-05-29 Lg Electronics Inc. Dust separation apparatus of vacuum cleaner
US8302252B2 (en) 2007-05-07 2012-11-06 Lg Electronics Inc. Dust separating apparatus of vacuum cleaner
US8316507B2 (en) 2007-03-16 2012-11-27 Lg Electronics Inc. Vacuum cleaner and dust separating apparatus thereof

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FR2808988B1 (fr) * 2000-05-16 2002-07-19 Seb Sa Bac recuperateur de dechets pour aspirateur
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FR2816494B1 (fr) * 2000-11-14 2003-05-16 Seb Sa Bac recuperateur de dechets pour aspirateur et dispositif de separation associe
KR100398684B1 (ko) * 2000-11-27 2003-09-19 삼성광주전자 주식회사 진공청소기의 사이클론 집진장치
FR2832915B1 (fr) * 2001-12-05 2006-09-22 Seb Sa Dispositif de separation des dechets pour aspirateur
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DE60331119D1 (de) * 2002-06-11 2010-03-18 Hitachi Home & Life Solutions Elektrischer Staubsauger
US7356875B2 (en) * 2003-03-11 2008-04-15 Healthy Gain Investments Ltd Air exhaust system for a cleaning machine
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EP1774890B1 (de) * 2005-10-11 2013-08-07 Samsung Electronics Co., Ltd. Multizyklon-Staubsammler für einen Staubsauger
DE102005056922A1 (de) * 2005-11-29 2007-05-31 BSH Bosch und Siemens Hausgeräte GmbH Staubsauger mit Fliehkraftabscheider
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CN1272048A (zh) 2000-11-01
DE69919106D1 (de) 2004-09-09
FR2778546A1 (fr) 1999-11-19
BR9906376A (pt) 2000-07-11
WO1999059458A1 (fr) 1999-11-25
AU3935199A (en) 1999-12-06
FR2778546B1 (fr) 2000-06-30
TR200000094T1 (tr) 2000-09-21
US6332239B1 (en) 2001-12-25
PL337924A1 (en) 2000-09-11
PL190193B1 (pl) 2005-11-30
RU2198581C2 (ru) 2003-02-20
CN1126500C (zh) 2003-11-05
EP0996355A1 (de) 2000-05-03

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