EP1088166A1 - Membranpumpe und vorrichtung zur steuerung derselben - Google Patents
Membranpumpe und vorrichtung zur steuerung derselbenInfo
- Publication number
- EP1088166A1 EP1088166A1 EP99926372A EP99926372A EP1088166A1 EP 1088166 A1 EP1088166 A1 EP 1088166A1 EP 99926372 A EP99926372 A EP 99926372A EP 99926372 A EP99926372 A EP 99926372A EP 1088166 A1 EP1088166 A1 EP 1088166A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- evaluation unit
- diaphragm pump
- displacement
- displacement space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
-
- 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
- F04B2203/00—Motor parameters
- F04B2203/09—Motor parameters of linear hydraulic motors
- F04B2203/0903—Position of the driving piston
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/03—Pressure in the compression chamber
Definitions
- the invention relates to a diaphragm pump with a device for controlling the position of a diaphragm separating a delivery and a displacement space and with a reservoir for the hydraulic medium, which is connected to the displacement space via a refill unit.
- the invention relates to a method for controlling the position of a membrane, which separates the delivery and displacement chamber of a membrane pump and is driven by an oscillating displacer via a hydraulic medium, the displacement chamber being replenished with hydraulic medium via a line if necessary.
- Such pumps are, for example, as
- Piston diaphragm pump known from EP AI 0 085 725.
- the piston diaphragm pump has a displacement piston which is oscillated back and forth in a displacement chamber completely filled with hydraulic medium.
- the membrane arranged between the delivery chamber and the displacement chamber thereby executes a membrane stroke corresponding to the piston stroke volume.
- the liquid to be pumped flows into the delivery chamber via the suction valve and is expelled via the pressure valve during the pressure stroke.
- a support plate which can be moved within a limited area and which protects the membrane against excessive deflection at the end of the suction stroke.
- Membrane the support plate or a plunger scanning the membrane system.
- the support plate or the plunger is moved by the membrane against the pressure of springs in the direction of the displacement work space.
- the plunger which either directly scans the membrane system or the support plate, mechanically releases a refill valve which opens as a result of the negative pressure prevailing in the displacement work space and allows hydraulic medium to flow into the displacement work space from a reservoir.
- the membrane and the support plate move back towards the delivery chamber under pressure from the springs.
- the guard locking of the refill valve slides back towards the delivery chamber and closes the refill valve.
- Vent valve provided, which allows escape of excess hydraulic or the freed air volume.
- the venting valve also serves to discharge excess volume of hydraulic medium from the displacement chamber in order to ensure the function of the mechanical refill device.
- vent valve is known, for example, from the applicant's "AREX” company publication.
- the object of the invention is to provide a diaphragm pump in which the volume of the displacement space can be controlled as simply as possible, so that the diaphragm is protected and the overall operational reliability of the pump is increased.
- Refill unit is actuated.
- the pressure sensor located in the displacement chamber reports the generation of the negative pressure to the evaluation unit during the intake stroke. There, this signal is compared, for example, with a predetermined limit value. As soon as the specified limit value is exceeded, the evaluation unit generates a signal which causes the displacement space to be refilled with hydraulic fluid. In this way, overloading of the membrane is avoided with certainty.
- the limit value can easily be adapted to the different operating conditions. Since the pressure sensor has no moving parts, operational safety is advantageously increased compared to mechanical systems.
- the membrane is covered by the
- Pressure sensor is not additionally loaded, since it is not in direct contact with the membrane, but only comes into contact with the hydraulic medium.
- the invention is thus based on the electronic evaluation of the pressure profile over time in the displacement space of a hydraulically articulated diaphragm pump. It is also advantageous if this pressure profile is optionally assigned to the displacer position.
- the correct filling of the displacement space is ensured by an algorithm running on a computer unit and by a refill unit operated via an active connection. Leakages that occur or a lack of hydraulic medium in the displacement chamber are recognized and supplemented again.
- a support plate for the membrane is arranged in the displacement space, an additional, more pronounced vacuum pulse is generated in the displacement space as soon as the membrane contacts the support plate during the suction stroke.
- This vacuum pulse can be evaluated even more precisely by the evaluation unit and a signal for refilling can be generated therefrom, which advantageously increases the operational reliability of the pump.
- two criteria can then be checked simultaneously by the evaluation unit, for example. H. the membrane reaches its rear system and the pressure in the hydraulic chamber is slightly below the ambient pressure in the reservoir.
- Refilling can be realized particularly advantageously if the refill unit is designed as a valve, preferably as an electrically operated valve which is arranged in the refill line
- Displacement chamber and the reservoir for the hydraulic medium can produce.
- diaphragm pumps in operation can also be easily retrofitted, so that the advantages of the electronic ones Activation of the refill valve can also be used with older pumps.
- the evaluation unit is designed to generate a ventilation signal, which actuates a ventilation unit, at a point in time during a working cycle of the displacer in which the pressure in the displacer space is greater than the ambient pressure in the reservoir for the hydraulic fluid, if necessary, Air originally dissolved in the hydraulic medium is discharged from the displacement space.
- the displacement chamber is vented and refilled at different times, it is advantageous to dispense with separate valves. Both functions can be performed by the same valve if the vent valve and the refill valve are designed as one unit. Alternatively, the air originally released in the hydraulic medium can be discharged from the displacement chamber both through the refill valve itself and through a further, for example electromagnetically controlled, identical vent valve.
- the refill and the vent valve can be constructed identically. The venting and refilling processes are carried out as required and not necessarily with every work cycle.
- Another possibility, without the use of a position sensor, is to arrange a pressure sensor in the delivery chamber of the diaphragm pump with a signal connection to the evaluation unit in addition to the pressure sensor in the displacement space.
- the two sensor signals can be linked in the evaluation unit, for example by forming a difference, and the refill or vent signals can be generated. This also ensures safe switching of the refill and vent valve even under all operating conditions.
- the pressure sensors can alternatively be used as sensors for detecting the expansion of the housing components
- the displacement position is advantageously determined by providing a position sensor for signaling the displacement position and providing a signal connection from the position sensor to the evaluation unit. This additional information about the position of the piston and the combination of the piston position with the pressure signal enables additional interlocks that reliably prevent the venting or ventilation valves from switching at the wrong time.
- the pressure signal in the displacement space is detected by a sensor and fed to an evaluation unit, which, according to a specific algorithm, replenishes the displacement space with hydraulic medium as required and, if necessary, venting the displacement space from gas portions that were originally released in the hydraulic medium.
- a derivative based on time or on the way can be processed as a signal.
- the pressure in the displacement space is advantageously detected by a sensor and fed to an evaluation unit, which uses it to vent the displacement space according to a specific algorithm.
- the reliability of the method is further increased by the measure that the position of the displacer is detected, for example by an angle sensor on the drive shaft, and is fed to the evaluation unit and the signal is linked to the pressure in the displacement space by the evaluation unit.
- the pressure in the delivery chamber and the pressure can also be detected in order to effect the refilling and / or venting of the displacement chamber
- Evaluation unit are supplied and linked to the pressure in the displacement space by the evaluation unit.
- Figure 1 Sketch of a hydraulically articulated
- Figure 2 Diagram of the pressure curve in the delivery chamber of a hydraulically articulated diaphragm pump without refilling
- Figure 3 Diagram of the pressure curve in the displacement space of a hydraulically articulated diaphragm pump
- FIG. 1 the structure of a hydraulically articulated diaphragm pump head is shown with an electronic control according to the invention.
- a pressure curve according to FIG. 2 typically occurs in the delivery chamber 1 of this diaphragm pump head 12 as a function of time.
- the oscillating movement of the displacer 3 is transmitted to the membrane 4 by the hydraulic medium contained in the displacer 2 and under alternating pressure. If intentional or unforeseen leakage occurs in displacement space 2, there is a lack of hydraulic fluid.
- the membrane 4 reaches the rear system which can be flowed through and which is preferably designed as a perforated plate 5, before the displacer 3 has reached its rear dead position. The movement of the membrane 4 and the displacer 3 are thus decoupled.
- the pressure in the displacement chamber 2 drops below the level in the delivery chamber 1 up to the vapor pressure of the hydraulic fluid.
- FIG. 3 shows the temporal pressure curve that can be detected with the pressure sensor 6.
- the lowering of the pressure at the end of the suction stroke can be seen, which occurs when the membrane 4 abuts the perforated plate 5.
- the refilling process can now take place through the refill valve 9, since there is a pressure drop from the hydraulic fluid under ambient air pressure in the reservoir 11 to the displacement space 2.
- the pressure drop in the hydraulic chamber 2 at the end of the suction stroke is identified by evaluating the signal from the pressure sensor 6 and, if necessary, additionally by linking it to the signal from the position sensor 7 in the evaluation unit 8.
- the evaluation unit is designed as a freely programmable computer unit.
- the position sensor 7 indicates the current position of the displacer 3.
- the combination of the signals from the position sensor 7 and the pressure sensor 6 prevents, for example, disturbing pressure drops in the displacement space 2 as a result of liquid vibrations or throttling as a result of cross-sectional constrictions in the suction line leading to the effect of the refilling process.
- the algorithm running on the evaluation unit 8 therefore makes a sensible decision about blocking and releasing the refilling process by the refill valve 9.
- the algorithm on the computer unit 8 can release the vent valve 10 at a different time than the refill valve 9 as soon as there is a pressure drop from the displacement chamber 2 to the reservoir 11. In this way, excess hydraulic medium can be expelled from the displacement chamber 2, for example as a result of a change in the stroke of the pump engine and / or gases which have been released and originally dissolved in the hydraulic medium. Due to the temporal separation of the refill and the 11
- the piston is in its membrane-side end position.
- the pressure valve 16 closes.
- the piston relaxes the delivery medium enclosed between the closed pressure valve 16 and the suction valve 15, including the hydraulic medium contained in the displacement chamber, until the media reach the mean pressure in the suction line p sm at the time t 1 and the suction valve 15 opens .
- the piston continues to move and now sucks in the medium from the delivery line until the time t 2, the membrane 4 abuts the perforated plate 5 and the pressure in the displacement chamber 2 drops below the average pressure of the suction line p sm .
- the refill valve 9 opens briefly.
- the piston thus exceeds its reversing position and allows the intake valve 15 to close at time t.
- the medium enclosed in the delivery chamber is then compressed down to the mean pressure and the pressure line Pm.
- the pressure valve opens at time t 5 .
- the delivery volume is expelled from the delivery chamber 1 through the pressure valve 16 until the piston reaches its other reverse position and the pressure valve is closed at time t 6 .
- a new work cycle begins.
- the diagram is an idealized representation. Deviations are common in practice. For example, the diagram may change due to impacts in the suction and pressure lines as well as ventilation processes.
- Seals are checked. Depending on the leakage behavior, maintenance can be carried out if necessary. Finally, the assembly of the pump is also more convenient since there is no need to adjust the mechanical refill device. The necessary setting processes can be carried out directly on the evaluation unit during operation.
- the evaluation device therefore advantageously has a non-volatile data memory, which stores the corresponding data for a number of strokes in the event of an interruption in operation for later diagnosis and then makes it readable.
- evaluation unit 8 is additionally equipped with an interface to a communication network, it is possible to check the operation of the pump remotely and, if necessary, to determine errors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19826610 | 1998-06-16 | ||
DE19826610A DE19826610A1 (de) | 1998-06-16 | 1998-06-16 | Membranpumpe und Vorrichtung zur Steuerung derselben |
PCT/EP1999/003541 WO1999066204A1 (de) | 1998-06-16 | 1999-05-22 | Membranpumpe und vorrichtung zur steuerung derselben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1088166A1 true EP1088166A1 (de) | 2001-04-04 |
EP1088166B1 EP1088166B1 (de) | 2002-07-31 |
Family
ID=7870931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99926372A Expired - Lifetime EP1088166B1 (de) | 1998-06-16 | 1999-05-22 | Membranpumpe und verfahren zur steuerung derselben |
Country Status (7)
Country | Link |
---|---|
US (1) | US6554578B1 (de) |
EP (1) | EP1088166B1 (de) |
JP (1) | JP4153166B2 (de) |
AT (1) | ATE221620T1 (de) |
DE (2) | DE19826610A1 (de) |
ES (1) | ES2183566T3 (de) |
WO (1) | WO1999066204A1 (de) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2178915B1 (es) * | 2000-03-07 | 2004-04-16 | Plasticos Mondragon, S.A. | Valvula hidraulica de membrana perfeccionada, para regulacion del caudal de fluidos. |
DE10138674B4 (de) * | 2001-08-07 | 2011-08-11 | Kleibrink, Horst, 45473 | Verfahren zur Vermeidung von Havariefällen von Membrankompressoren |
DE10322221B3 (de) | 2003-05-16 | 2005-01-27 | Lewa Herbert Ott Gmbh + Co | Leckageüberwachung im Hydraulikdruckraum einer Membranpumpe |
BRPI0318302B1 (pt) * | 2003-05-16 | 2017-03-28 | Wanner Eng Incorporated | bomba de diafragma |
EP1536137B1 (de) * | 2003-11-25 | 2006-10-25 | Magneti Marelli Powertrain S.p.A. | Kraftstoffpumpe für eine Brennkraftmaschine |
US7517199B2 (en) * | 2004-11-17 | 2009-04-14 | Proportion Air Incorporated | Control system for an air operated diaphragm pump |
EP1828602B1 (de) * | 2004-11-17 | 2019-04-03 | Proportionair Inc. | Steuersystem für eine luftbetätigte membranpumpe |
US7658598B2 (en) * | 2005-10-24 | 2010-02-09 | Proportionair, Incorporated | Method and control system for a pump |
CN101273199A (zh) * | 2005-09-27 | 2008-09-24 | 冈山县 | 泵 |
FR2898942B1 (fr) * | 2006-03-24 | 2008-05-02 | Siemens Automotive Hydraulics | Pompe transfert pour injection d'essence a haute pression |
US20080003120A1 (en) * | 2006-06-30 | 2008-01-03 | Meza Humberto V | Pump apparatus and method |
DE102006041420A1 (de) * | 2006-09-04 | 2008-03-20 | Bran + Luebbe Gmbh | Pumpenvorrichtung |
DE102006050943B4 (de) * | 2006-10-28 | 2020-04-16 | Pfeiffer Vacuum Gmbh | Vakuumpumpe und Verfahren zum Betrieb derselben |
WO2009028963A2 (en) * | 2007-08-30 | 2009-03-05 | Fisher & Paykel Appliances Limited | Variable pressure water delivery system |
DE202008011817U1 (de) * | 2008-09-05 | 2010-02-11 | Vacuubrand Gmbh + Co Kg | Oszillierende Verdrängervakuumpumpe |
US20110236932A1 (en) * | 2008-12-19 | 2011-09-29 | Stobbe Tech A/S | Biopharmaceutical plant in a column |
AU2010206569B2 (en) * | 2009-01-23 | 2012-06-14 | Warren Rupp, Inc. | Method for increasing compressed air efficiency in a pump |
BRPI1011440A2 (pt) * | 2009-05-08 | 2016-03-15 | Rupp Warren Inc | bomba, e, metodo para fornecer energia a uma bomba |
US8591200B2 (en) * | 2009-11-23 | 2013-11-26 | National Oil Well Varco, L.P. | Hydraulically controlled reciprocating pump system |
US8382445B2 (en) * | 2009-12-16 | 2013-02-26 | Warren Rupp, Inc. | Air logic controller |
CA2730696C (en) * | 2010-02-02 | 2018-09-18 | Peter Van De Velde | Hydraulic fluid control system for a diaphragm pump |
US8833605B2 (en) * | 2010-07-20 | 2014-09-16 | Ecolab Usa Inc. | Product delivery and monitoring system |
DE102010060532A1 (de) * | 2010-11-12 | 2012-05-16 | Aker Wirth Gmbh | Verfahren und System zum Erkennen von Schäden an Arbeitsflüssigkeiten umfassenden Kolben-Membranpumpen |
US9121397B2 (en) | 2010-12-17 | 2015-09-01 | National Oilwell Varco, L.P. | Pulsation dampening system for a reciprocating pump |
KR101205869B1 (ko) | 2011-05-02 | 2012-11-28 | 주식회사 삼산코리아 | 정량펌프 |
US10054115B2 (en) | 2013-02-11 | 2018-08-21 | Ingersoll-Rand Company | Diaphragm pump with automatic priming function |
JP6312832B2 (ja) * | 2013-08-27 | 2018-04-18 | メリング ツール カンパニーMelling Tool Co. | 温度制御装置及び自動車用冷却システムのための方法 |
CN104214078B (zh) * | 2014-08-08 | 2016-06-15 | 云南大红山管道有限公司 | 一种具有自动保护功能的隔膜泵及其自动保护方法 |
JP6362008B2 (ja) * | 2015-02-09 | 2018-07-25 | Smc株式会社 | ポンプシステム及びポンプの異常検出方法 |
US20180372083A1 (en) * | 2017-06-22 | 2018-12-27 | Wanner Engineering, Inc. | Hydraulic diaphragm control |
DK179576B1 (en) | 2017-07-13 | 2019-02-20 | Nel Hydrogen A/S | A METHOD OF CONTROLLING THE HYDRAULIC FLUID PRESSURE OF A DIAPHRAGM COMPRESSOR |
CN110219798B (zh) * | 2019-06-05 | 2021-04-13 | 苏州柔性智能科技有限公司 | 用于流体传输的多功能软体泵 |
JP7246258B2 (ja) * | 2019-06-12 | 2023-03-27 | 日機装株式会社 | ダイアフラムポンプ及びそれを用いた血液浄化装置 |
DE102019117731A1 (de) * | 2019-07-01 | 2021-01-07 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Verfahren zur Positionserfassung der Membran einer elektromotorisch angetriebenen Membranpumpe |
US12060875B2 (en) * | 2020-11-09 | 2024-08-13 | Pdc Machines Inc. | Hydraulic drive for diaphragm compressor |
ES2946411T3 (es) * | 2021-07-26 | 2023-07-18 | Gea Mech Equipment Italia S P A | Una bomba de pistón basada en membrana y un aparato de homogeneización que comprende la bomba de pistón basada en membrana |
WO2023191913A1 (en) * | 2022-03-28 | 2023-10-05 | Wanner Engineering, Inc. | Diaphragm position control system |
DE202022104589U1 (de) | 2022-08-12 | 2023-11-16 | Fresenius Medical Care Deutschland Gmbh | Membranpumpenantrieb |
EP4446586A1 (de) * | 2023-04-12 | 2024-10-16 | Stratec SE | Drucküberwachte kolbenpumpe |
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DE2102762C3 (de) * | 1971-01-21 | 1978-09-14 | Tuchenhagen, Otto, 2059 Buechen | Einrichtung zur Regelung von Druck und Fördermenge einer hydraulisch betätigten Membranpumpe |
JPS5685583A (en) | 1979-12-14 | 1981-07-11 | Diesel Kiki Co Ltd | Controlling device for variable delivery rotary pump |
DE2930765C2 (de) * | 1979-07-28 | 1983-01-05 | BURDOSA Ing. Herwig Burgert, 6305 Buseck | Gelochte Stützscheibe für die Membran einer hydraulisch betätigten Membranpumpe |
US4353684A (en) | 1980-09-05 | 1982-10-12 | Superpressure, Inc. | Pressure limiting device |
EP0085725B1 (de) * | 1982-02-05 | 1984-11-28 | Bran & Lübbe GmbH | Kolbenmembranpumpe |
DE3546189A1 (de) * | 1985-12-27 | 1987-07-02 | Ott Kg Lewa | Verfahren und vorrichtung zur durchflussmessung bei oszillierenden verdraengerpumpen |
DE3706338A1 (de) * | 1987-02-27 | 1988-09-08 | Wagner Gmbh J | Membranpumpvorrichtung |
US5167837A (en) * | 1989-03-28 | 1992-12-01 | Fas-Technologies, Inc. | Filtering and dispensing system with independently activated pumps in series |
US5056036A (en) | 1989-10-20 | 1991-10-08 | Pulsafeeder, Inc. | Computer controlled metering pump |
NL9101556A (nl) * | 1991-09-16 | 1993-04-16 | Holthuis Bv | Besturingssysteem voor zuigermembraanpomp. |
US5249932A (en) * | 1991-10-07 | 1993-10-05 | Erik Van Bork | Apparatus for controlling diaphragm extension in a diaphragm metering pump |
DE4309380C2 (de) * | 1993-03-23 | 2000-01-05 | Infors Ag Bottmingen | Verfahren zur Überwachung eines Systems |
DE4420863C2 (de) * | 1994-06-15 | 1998-05-14 | Ott Kg Lewa | Gesteuerte Schnüffelbehinderung für Hochdruck-Membranpumpen |
-
1998
- 1998-06-16 DE DE19826610A patent/DE19826610A1/de not_active Withdrawn
-
1999
- 1999-05-22 ES ES99926372T patent/ES2183566T3/es not_active Expired - Lifetime
- 1999-05-22 EP EP99926372A patent/EP1088166B1/de not_active Expired - Lifetime
- 1999-05-22 JP JP2000554993A patent/JP4153166B2/ja not_active Expired - Fee Related
- 1999-05-22 AT AT99926372T patent/ATE221620T1/de not_active IP Right Cessation
- 1999-05-22 WO PCT/EP1999/003541 patent/WO1999066204A1/de active IP Right Grant
- 1999-05-22 US US09/719,650 patent/US6554578B1/en not_active Expired - Lifetime
- 1999-05-22 DE DE59902205T patent/DE59902205D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9966204A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2183566T3 (es) | 2003-03-16 |
US6554578B1 (en) | 2003-04-29 |
DE19826610A1 (de) | 1999-12-23 |
ATE221620T1 (de) | 2002-08-15 |
DE59902205D1 (de) | 2002-09-05 |
JP4153166B2 (ja) | 2008-09-17 |
WO1999066204A1 (de) | 1999-12-23 |
JP2002518635A (ja) | 2002-06-25 |
EP1088166B1 (de) | 2002-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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