EP1175563B1 - Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung - Google Patents
Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung Download PDFInfo
- Publication number
- EP1175563B1 EP1175563B1 EP00931084A EP00931084A EP1175563B1 EP 1175563 B1 EP1175563 B1 EP 1175563B1 EP 00931084 A EP00931084 A EP 00931084A EP 00931084 A EP00931084 A EP 00931084A EP 1175563 B1 EP1175563 B1 EP 1175563B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- pump
- inlet opening
- inlet
- pump body
- 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
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 97
- 238000013459 approach Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/028—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like flexible member
Definitions
- the invention relates to a diaphragm pump according to the genus Main claim.
- the diaphragm pump resulting from this utility model has a membrane which can be actuated by a crank drive and which is connected to an outer Membrane annulus is attached to a pump body of a pump housing.
- the membrane has a membrane core that over an elastically deformable membrane ring with the outer membrane ring connected is.
- the membrane closes with one formed on the pump body Pump body area a pump chamber (scoop chamber).
- scoop chamber Are in the pump body an inlet channel and an outlet channel formed at an inlet opening and a Open the outlet opening in the surface of the pump body.
- the inlet duct and the Outlet channels are preferably with outside of the pump body Flow direction valves connected, creating a flow direction through the Inlet channel and the outlet channel is predetermined.
- Flow direction valves connected, creating a flow direction through the Inlet channel and the outlet channel is predetermined.
- a disadvantage of the diaphragm pump known from utility model G 9406216 is that during the ejection stroke part of what is in the pump chamber Pump medium is pressed back into the inlet channel or compressed therein. In particular with a compressible pressure medium, the deteriorates Efficiency of the diaphragm pump considerably.
- Another disadvantage is that the Exhaust opening is throttled depending on the stroke position of the crank drive, the throttling before reaching the top dead center position of the crank drive increases, so that at the end of the discharge stroke the highly compressed pump medium can escape increasingly poorly.
- one can in the known diaphragm pump Compression ratio of the diaphragm pump does not correspond to the amount of pump medium Eject completely from the pump chamber via the outlet opening. Also suitable the known diaphragm pump is only limited for compressible pumping medium such as. Gases.
- US 3,947,156 discloses a diaphragm pump according to the preamble of Claim 1.
- the present invention is the The task is to propose a diaphragm pump that is as large as possible Compression ratio of the pump medium in the pump chamber allowed and on enables reliable closing of the inlet opening by the membrane ring.
- the Inlet opening reliably and closed on all sides.
- the center of the inlet opening at least approximately in the Rotation level of the crank of the crank drive is.
- the inlet opening of the Inlet duct closed particularly early.
- the elastically deformable membrane ring advantageously closes the Inlet opening at a crank rotational position of the crank drive, which is up to 90 ° before top dead center. As a result, the membrane is deflected from a maximum the diaphragm pump reaches a seal.
- the elastically deformable membrane ring advantageously closes the Inlet opening at a crank rotational position of the crank drive, which is 20 ° to 90 ° in front of the top dead center. This will seal the inlet opening of the Inlet channel from a maximum deflection of the membrane of the membrane pump reached, with a closed inlet opening of the inlet channel, part of the Crank rotation is available to more compression the To achieve pump medium.
- the inlet valve has a valve plate, which Inlet opening covered.
- the valve plate directly at the inlet opening of the Inlet channel is arranged can further reduce the dead volume of the inlet channel become.
- the central axis of the inlet channel is oriented perpendicular to the pump body surface. This is the structural Design of the directional valve and the introduction of the valve plate in the Inlet channel simplified.
- the outlet opening of the outlet channel is advantageously in a region of the Pump body surface arranged, the diaphragm last approaches and that of the diaphragm is reached at the earliest at the top dead center position of the crank drive is. It is thereby achieved that the pump medium from the pump chamber is as possible can be pumped unthrottled into the outlet channel. It is also achieved that the outlet opening of the outlet channel is not already before reaching the upper one Dead center position of the crank drive is closed.
- the membrane core of the Membrane is opposite. Because in the crank movement of the crank drive Pump medium due to the movement of the membrane core last from an over pumped out the region of the pump chamber arranged in the membrane core of the membrane the outlet opening of the outlet channel is thereby arranged particularly favorably.
- Figure 1 shows an extract according to the invention in a sectional view Diaphragm pump 1.
- the diaphragm pump 1 can be used in particular as a vacuum pump or as a pressure pump for pumping pump media, e.g. Liquids and gases, be used.
- pump media e.g. Liquids and gases
- the diaphragm pump 1 according to the invention is also suitable for other use cases.
- the diaphragm pump 1 has a pump body 2 which is connected to a housing element 3 is connected.
- the pump body 2 has an inlet channel 4, which in this Exemplary embodiment by stepped bores 5a, 5b, 5c and an oblique bore 6 is trained.
- a central axis 7 of the oblique bore 6 of the inlet channel 4 is there perpendicular to a pump body surface 8 formed on the pump body 2 oriented.
- the inlet channel 4 opens at an inlet opening 9 in the Pump body surface 8.
- the inlet opening 9 is in an outer region of the Pump room, i.e. near the clamping of the membrane in the pump body 2 arranged.
- the center of the inlet opening 9 is advantageously in the plane of rotation or pivoting of the crank 31 of the crank drive 32.
- the pivot plane of the crank 31 coincides with the sectional plane of Figure 1.
- the inlet valve In the area of the inlet opening 9, i.e. facing the pump room is a directional or inlet valve arranged.
- the inlet valve consists in the illustrated Embodiment of a valve plate 10 which in the region of the inlet opening 9 of the Inlet channel 4 is arranged to form the directional valve or inlet valve.
- the area of the inlet opening 9 has the oblique bore 6 of the pump body 2 Pump room directed up to a circumferential pocket that has a larger diameter than the oblique hole has 6.
- the valve plate 10 is supported on one between the Inclined hole 6 and the pocket formed peripheral edge 11.
- the valve plate 10 is substantially flush with the pump body surface 8, at least while it is from the membrane is closed, whereby between the circumferential groove in the Inclined bore 6 and the pump body surface 8 results in a control edge 35.
- a circumferential and Control edge 35 protruding slightly beyond the valve plate, on which the Membrane closes the inlet opening 9.
- the circumferential control edge 35 ensures in an advantageous manner that the inlet valve with the valve plate 10 during the exhaust stroke is securely and reliably closed on all sides.
- An outlet element 16 is screwed into a thread 15 in the pump body 2, which has stepped bores 18a to 18d, which together with a Outlet recess 19 form an outlet channel 17.
- the outlet element 16 can also inserted and fastened by screws.
- the outlet channel 17 opens into one Outlet opening 20 into the pump body surface 8.
- a valve plate 21 Between the outlet recess 19 and the bore 18d is formed by a valve plate 21, a directional valve.
- the Exhaust valve with the valve plate 21 is in the area of the outlet recess 19 for Pump room arranged facing, which further improves the Pump effect is achieved.
- the outlet opening 20 is from the edge of the pump chamber The center is offset such that the outlet opening 20 during the exhaust stroke is closed as late as possible. In other words, the outlet opening is 20 in an area arranged last from the membrane at the end of the exhaust stroke is covered.
- Both the inlet valve with the valve plate 10 and the outlet valve with the Valve plate 21 are advantageously designed as freely movable valves, which at switch the lowest possible pressure differences in order to avoid compression losses and thus causing an indirect increase in the harmful volume.
- the valves are not biased in any direction by a clamp or tie, thereby additional forces for switching the valves would be necessary, but freely movable educated.
- the valves after lifting off their valve seat, i.e. after opening, at the end of the flow process again if possible to be returned stress-free to their respective seat is one accordingly trained valve holding device provided. It is both in the inlet valve also important for the exhaust valve that the clamping of the valve plates 10 and 21 are stress-free, i.e.
- the present exemplary embodiment includes two bolts for the inlet valve a thin retaining collar is provided on both sides of the inlet opening 9.
- the Inlet valve has elongated or oval mounting holes through which the bolts protrude. When the valve is opened, the valve plate is thus along the holes flexible and allows bending outwards into the pump chamber.
- the bore 18d is a preferably circumferential groove, which is in the outlet element 16 directed towards the seat of the valve plate 21 and the valve plate 21 one allows free opening movement away from the pump room.
- the membrane has a membrane core 25, an elastically deformable Membrane ring 26 and an outer membrane circular ring 27, the membrane 24th on the outer membrane ring 27 between the pump body 2 and the Housing element 3 is attached.
- the membrane is in the unclamped state essentially flat and is between the pump body 2 and the Housing element 3 clamped that the membrane towards Pump body surface 8 is biased.
- the membrane becomes tangential-globular clamped, as can be seen in Figures 1 to 4.
- the concave Pump body surface 8 also in the area of the clamping of the diaphragm ring 27 continued so that the membrane at least in the outer region, i.e. in the area of the diaphragm ring 27 at the edge regions of the concave pump body surface 8 is applied.
- the diaphragm pump according to the invention is designed so that the compression ratio, i.e. the ratio of maximum to minimum Pump chamber volume is optimized. Since the compression ratio is particularly different from that minimum achievable pump chamber volume is dependent and therefore determined by it is how well the elastic membrane can close off the pump chamber the properties of the diaphragm pump according to the invention described above an optimization has been achieved in this regard.
- a core 28 is vulcanized into the membrane core 25 of the membrane 24, one plate-shaped section 29 and a cylindrical section 30.
- a connecting device 31 is the cylindrical section 30 of the mandrel 28 connected to a crank 31 of a crank drive 32.
- FIGS The exemplary embodiment of the diaphragm pump from FIG. 1 is shown in FIGS different crank rotational positions of the crank drive shown.
- 1 is the Crank rotation position of the diaphragm pump at an upper dead center, in Figure 2 after 50 ° top dead center, in FIG. 3 at bottom dead center and in FIG. 5 50 ° in front of one shown top dead center. Since in Figures 2 to 4, the elements shown with 1 correspond to a repetitive description waived.
- the membrane ring 26 and / or the pump body surface 8 can also be designed so that the inlet opening 9 of the inlet channel 4 at the in Figure 2 shown crank position of the crank drive 32 is already open. in the general is at a rotary crank position of the crank drive 32, the 90 ° after the top dead center position, the inlet opening 9 of the inlet channel 4 is open.
- the Membrane 24 is lifted by the rotary crank movement of the crank drive 32 Pump body surface 8, whereby a between the membrane 24 and the Pump body area 8 formed pump chamber 38 enlarged and from the opening of the Inlet opening 9 of the inlet channel 4 a pumping medium from the inlet channel 4 through the Inlet opening 9 is sucked into the pump chamber 38.
- the crank rotary position of the diaphragm pump 1 shown in FIG. 3 is included Ejection stroke of the membrane 24, whereby the pump medium in the pump chamber 38 compressed and via the outlet opening 20 of the outlet channel 17 from the Diaphragm pump 1 is ejected. It is achieved by the valve plate 10 that the pump medium from the pump chamber 38 does not flow back into the inlet channel 4.
- FIG. 4 a rotary crank position of the crank drive 32 is shown, which is 50 ° before The top dead center position of the rotary crank drive 32 shown in FIG. there the axis 37 is tilted relative to the axis 39 of the pump body surface 8, the Tilting opposite to the tilting in Figure 2 takes place. This is approaching the membrane 24 first of the inlet opening 9 of the inlet channel 4, wherein in the shown angular position of the crank drive 32, the inlet opening 9 already from the elastically deformable membrane ring 26 is closed.
- the Pump chamber 38 from the inlet opening to the outlet opening 20 of the outlet channel 17 itself widened so that the pump medium from the pump chamber 38 at the further rotary movement of the crank drive 32 preferably in the area of Exhaust opening 20 of the outlet channel 17 collects, causing a complete pumping out of the pump medium from the pump chamber 38 into the outlet channel 17.
- the Outlet opening 20 of the outlet channel 17 is in one in this embodiment Area of the pump body surface 8, which the membrane 24 approaches last and that of the membrane 24 at the earliest at the top dead center position of the Crank drive 32 is reached. It is thereby achieved that the outlet opening 20 only after the ejection stroke of the crank drive 32 can be closed.
- the center of the outlet opening 20 of the outlet channel 17 in an inner Area of the pump body surface 8 is arranged, the membrane core 25 of the Membrane 24 is opposite.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
Description
- 1
- Membranpumpe
- 2
- Pumpenkörper
- 3
- Gehäuseelement
- 4
- Einlaßkanal
- 5
- Bohrung
- 6
- Schrägbohrung
- 7
- Mittelachse
- 8
- Pumpenkörperfläche
- 9
- Einlaßöffnung
- 10
- Ventilplatte
- 11
- Umlaufende Kante
- 15
- Gewinde
- 16
- Auslaßelement
- 17
- Auslaßkanal
- 18
- Bohrung
- 19
- Auslaßaussparung
- 20
- Auslaßöffnung
- 21
- Ventilplatte
- 24
- Membrane
- 25
- Membrankern
- 26
- Membranring
- 27
- Äußerer Membrankreisring.
- 28
- Formkern
- 29
- Tellerförmiger Abschnitt
- 30
- Zylinderförmiger Abschnitt
- 32
- Kurbelantrieb
- 33
- Verbindungseinrichtung
- 35
- Steuerkante
- 36
- Drehrichtung
- 37
- Achse
- 38
- Pumpraum
- 39
- Achse
Claims (8)
- Membranpumpe (1) mit einer von einem Kurbelantrieb (32) betätigbaren Membrane (24), die zusammen mit einer konkaven Pumpenkörperfläche (8) einen Pumpraum (38) einschließt, einem Einlaßkanal (4) und einem Auslaßkanal (17), die an einer Einlaßöffnung (9) und einer Auslaßöffnung (20) in die Pumpenkörperfläche (8) münden, wobei die Membrane (24) einen Membrankern (25) und einen elastisch verformbaren Membranring (26) aufweist, und der Membrankern (25) eine an die Pumpenkörperfläche (8) angepaßte, konvexe Oberfläche aufweist,
wobei
die Einlaßöffnung (9) in einem Bereich der Pumpenkörperfläche (8) angeordnet ist, dem sich die Membrane (24) bei einem Ausstoßhub des Kurbelantriebs (32) zuerst nähert, und
der elastisch verformbare Membranring (26) die Einlaßöffnung (9) vor dem Erreichen der oberen Totpunkstellung des Kurbelantriebs (32) verschließt,
dadurch gekennzeichnet, daß ein Einlaßventil vorgesehen ist, das in dem Bereich der Einlaßöffnung (9) des Einlaßkanals (4) angeordnet ist, wobei in dem Randbereich der Einlaßöffnung (9) eine umlaufende Steuerkante (35) ausgebildet ist, an der der elastisch verformbare Membranring (26) das Einlaßventil verschließt. - Membranpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß das Einlaßventil eine Ventilplatte (10) aufweist, die die Einlaßöffnung (9) überdeckt. - Membranpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Mittelpunkt der Einlaßöffnung (9) zumindest annähernd in der Drehebene der Kurbel (31) des Kurbelantriebs (32) liegt. - Membranpumpe nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß der elastisch verformbare Membranring (26) die Einlaßöffnung (9) bei einer Kurbeldrehstellung des Kurbelantriebs (32) verschließt, die bis zu 90° vor der oberen Totpunktlage liegt. - Membranpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß der elastisch verformbare Membranring (26) die Einlaßöffnung (9) bei einer Kurbeldrehstellung des Kurbelantriebs (32) verschließt, die 20° bis 90° vor der oberen Totpunktlage liegt. - Membranpumpe nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Mittelachse (7) des Einlaßkanals (4) senkrecht zu der Pumpenkörperfläche (8) orientiert ist. - Membranpumpe nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Auslaßöffnung (20) des Auslaßkanals (17) in einem Bereich der Pumpenkörperfläche (8) angeordnet ist, dem sich die Membrane (24) zuletzt nähert und der von der Membrane (24) frühenstens bei der oberen Totpunktstellung des Kurbelantriebs (32) erreicht ist. - Membranpumpe nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß der Mittelpunkt der Auslaßöffnung (20) des Auslaßkanals (17) in einem inneren Bereich der Pumpenkörperfläche (8) angeordnet ist, der dem Membrankern (25) der Membrane (24) gegenüberliegt.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19919908 | 1999-04-30 | ||
| DE19919908A DE19919908B4 (de) | 1999-04-30 | 1999-04-30 | Membranpumpe mit einer durch die Membrane gesteuerten Einlaßöffnung |
| PCT/EP2000/003857 WO2000066891A1 (de) | 1999-04-30 | 2000-04-28 | Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1175563A1 EP1175563A1 (de) | 2002-01-30 |
| EP1175563B1 true EP1175563B1 (de) | 2003-12-03 |
Family
ID=7906546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00931084A Expired - Lifetime EP1175563B1 (de) | 1999-04-30 | 2000-04-28 | Membranpumpe mit einer durch die membrane gesteuerten einlassöffnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6776591B1 (de) |
| EP (1) | EP1175563B1 (de) |
| AT (1) | ATE255682T1 (de) |
| DE (2) | DE19919908B4 (de) |
| WO (1) | WO2000066891A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494680C (zh) | 2000-09-14 | 2009-06-03 | 简W·比恩克 | 在一个工作室内输送可输送材料的方法及装置 |
| US7040869B2 (en) | 2000-09-14 | 2006-05-09 | Jan W. Beenker | Method and device for conveying media |
| EP1725792B1 (de) * | 2004-03-16 | 2013-01-30 | Hargraves Technology Corporation | Pumpendichtungsvorrichtung |
| DE102006021535B3 (de) * | 2006-05-08 | 2007-09-13 | Vacuubrand Gmbh + Co Kg | Vakuumpumpe |
| US8187227B2 (en) | 2006-11-01 | 2012-05-29 | Medela Holding Ag | Self returning contamination barrier |
| JP2012503970A (ja) * | 2008-09-26 | 2012-02-09 | エイアールビー グリーンパワー,エルエルシー | ハイブリッドエネルギィ変換システム |
| US8287249B2 (en) * | 2008-12-19 | 2012-10-16 | Gardner Denver Thomas, Inc. | Two-stage membrane pump with economical inlet port design |
| US8017409B2 (en) | 2009-05-29 | 2011-09-13 | Ecolab Usa Inc. | Microflow analytical system |
| DE202010002145U1 (de) | 2010-02-09 | 2011-09-07 | Vacuubrand Gmbh + Co Kg | Membranvakuumpumpe |
| US10330094B2 (en) * | 2013-08-26 | 2019-06-25 | Blue-White Industries, Ltd. | Sealing diaphragm and methods of manufacturing said diaphragm |
| CN110578683B (zh) * | 2018-06-08 | 2021-09-21 | 科际精密股份有限公司 | 隔膜泵及其阀片 |
| WO2020236471A1 (en) * | 2019-05-17 | 2020-11-26 | Illumina, Inc. | Linear peristaltic pumps for use with fluidic cartridges |
| CN114364877B (zh) * | 2019-09-03 | 2025-05-09 | 皇家飞利浦有限公司 | 用于泵的通气组件 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2605957A (en) * | 1945-06-20 | 1952-08-05 | Junius W Houston | Pumping apparatus |
| FR1149743A (fr) * | 1956-05-09 | 1957-12-31 | Compresseur à membrane et à manivelle de commande, plus particulièrement pour installations de refroidissement | |
| DE2212322A1 (de) * | 1972-03-15 | 1973-09-20 | Erich Becker | Membranpumpe zur druck- oder vakuumerzeugung |
| US3947156A (en) * | 1972-03-08 | 1976-03-30 | Erich Becker | Diaphragm pump, particularly for the generation of vacuum |
| DE2742139C2 (de) * | 1977-09-19 | 1980-08-21 | Erich 7812 Bad Krozingen Becker | Membranpumpe |
| DE2802900A1 (de) * | 1978-01-24 | 1979-07-26 | Erich Becker | Membranpumpe |
| DE4119228C2 (de) * | 1991-06-14 | 1995-04-13 | Knf Neuberger Gmbh | Membranpumpe |
| DE4200838C2 (de) * | 1992-01-15 | 1994-12-22 | Knf Neuberger Gmbh | Pumpe mit vom Fördermedium gesteuerten Ventilen |
| DE4412668C2 (de) * | 1994-04-13 | 1998-12-03 | Knf Flodos Ag | Pumpe |
| DE9406216U1 (de) | 1994-04-14 | 1994-09-22 | Knf-Neuberger Gmbh, 79112 Freiburg | Membranpumpe mit einer Formmembran |
-
1999
- 1999-04-30 DE DE19919908A patent/DE19919908B4/de not_active Expired - Lifetime
-
2000
- 2000-04-28 US US10/018,596 patent/US6776591B1/en not_active Expired - Lifetime
- 2000-04-28 EP EP00931084A patent/EP1175563B1/de not_active Expired - Lifetime
- 2000-04-28 AT AT00931084T patent/ATE255682T1/de not_active IP Right Cessation
- 2000-04-28 DE DE50004653T patent/DE50004653D1/de not_active Expired - Fee Related
- 2000-04-28 WO PCT/EP2000/003857 patent/WO2000066891A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE19919908A1 (de) | 2000-11-23 |
| DE19919908B4 (de) | 2004-09-23 |
| US6776591B1 (en) | 2004-08-17 |
| EP1175563A1 (de) | 2002-01-30 |
| DE50004653D1 (de) | 2004-01-15 |
| ATE255682T1 (de) | 2003-12-15 |
| WO2000066891A1 (de) | 2000-11-09 |
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