EP0716229A1 - Pompe à membrane double - Google Patents

Pompe à membrane double Download PDF

Info

Publication number
EP0716229A1
EP0716229A1 EP19950118226 EP95118226A EP0716229A1 EP 0716229 A1 EP0716229 A1 EP 0716229A1 EP 19950118226 EP19950118226 EP 19950118226 EP 95118226 A EP95118226 A EP 95118226A EP 0716229 A1 EP0716229 A1 EP 0716229A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm pump
double diaphragm
pump according
membranes
piston rod
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
Application number
EP19950118226
Other languages
German (de)
English (en)
Other versions
EP0716229B1 (fr
Inventor
Volker Dipl.-Ing. Stapelfeldt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Abel & Co Handels- and Verwaltungsgesellschaft GmbH
Abel GmbH and Co KG
Original Assignee
Abel & Co Handels- and Verwaltungsgesellschaft GmbH
Abel GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Abel & Co Handels- and Verwaltungsgesellschaft GmbH, Abel GmbH and Co KG filed Critical Abel & Co Handels- and Verwaltungsgesellschaft GmbH
Publication of EP0716229A1 publication Critical patent/EP0716229A1/fr
Application granted granted Critical
Publication of EP0716229B1 publication Critical patent/EP0716229B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18248—Crank and slide
    • Y10T74/18256—Slidable connections [e.g., scotch yoke]

Definitions

  • the invention relates to a double-acting diaphragm pump (double diaphragm pump) according to the preamble of claim 1.
  • a double diaphragm pump has become known with a piston mounted centrally in a housing with pump diaphragms attached to each of its free ends, each acting on a displacement space.
  • the displacement spaces are connected to the suction port on the one hand and the pressure port on the other hand via check valves.
  • a device is provided for alternately acting on the pressure chambers for the drive medium arranged on the side of the membranes opposite the displacement spaces. When compressed air is applied alternately, the membranes are moved in the same direction, the compressed air moving a membrane in the direction of the product space and displacing the pumped medium in the pressure port; the other membrane performs an intake stroke. The pumped medium is therefore displaced by compressed air and thus pumped.
  • Such pumps have a number of advantages. They are safe to run dry and self-priming. A brief overload is also not critical. No shaft seals are required and no rotating parts in the product flow.
  • the pump is also insensitive to solids. Impurities and solids can be conveyed in the product stream.
  • the displacement pump in such a pump can also be used for shear-sensitive media.
  • the invention has for its object to provide a double diaphragm pump that is simple in construction and reliable and that can be operated with high efficiency despite higher pump pressures.
  • the double diaphragm pump according to the invention is provided with mechanically driven diaphragms.
  • the invention provides a guide frame on which the piston rods connected to the membranes are connected on opposite sides.
  • a sliding block is mounted in the guide frame and guided by means of a linear guide.
  • the sliding block in turn supports the journal of a crankshaft that is connected to the drive motor. Round bars are preferably used for linear guidance.
  • the crank pin is preferably mounted in the sliding block by means of a roller bearing.
  • the sliding block inevitably follows the circular motion of the crank pin, but remains in the same position due to the positive guidance in the guide frame, which means that it moves in an oscillating manner along the guides.
  • the guides receive an oscillating movement in the direction of the positively guided piston rods. In this way, a low-friction, yet mechanically simple transmission of the rotary movement of the drive motor to the linearly adjustable piston rods is obtained.
  • the sliding block is preferably guided by means of plastic plain bearings, as is the piston rod in corresponding guide bores in the housing.
  • the membranes have approximately the shape of a spherical cap. This shape ensures that no folds occur in the membrane during the membrane stroke, which otherwise can easily lead to damage after a certain operating time.
  • a double diaphragm pump is created, which is also at higher back pressures due to the mechanical Forced operation works with a high degree of efficiency. It can be driven with an approximately constant characteristic curve, comparable to piston pumps, with a certain restriction being imposed by the elasticity of the membranes.
  • the pump according to the invention can therefore deliver a predetermined delivery rate at a predetermined pressure. It is small and can be operated quietly.
  • the housing of the pump can consist of many materials, for example aluminum, gray cast iron or stainless steel, depending on the application conditions.
  • a plastic housing can also be used, for example made of polypropylene, polytetrafluoroethylene, polyvinylidene fluoride or the like.
  • PTFE film To protect the membranes against abrasive and aggressive media, they can be coated with PTFE film. Such a membrane has however become known from G 84 32 2045.
  • the double diaphragm pump shown in FIGS. 1 and 2 has a first housing section 10, which is box-like and has a tubular extension 12 going out to one side.
  • Section 10 and neck 12 are formed in one piece, for example from cast aluminum, cast iron, stainless steel or the like.
  • flanges 14, 16 are formed, the weak spherical Wall sections 18, 20 are connected to the end faces of the housing section 10.
  • Circular membrane housing sections 22 and 24 are assigned to the flanges 14, 16 and are screwed to the flanges 14, 16.
  • Membranes 26 and 28 are clamped between these parts and have an O-ring-shaped cross section on the circumference, as shown at 30 and 32, respectively. They sit in corresponding annular grooves of flange 14, 16 or housing section 22, 24, so that the membranes 26, 28 are held securely.
  • the membranes 26, 28 are made of a suitable elastomer and can be coated with PTFE towards the displacement space 34 or 36. They are also reinforced with fabric inserts. The membranes 26, 28 have an approximately spherical cap shape. Therefore, they do not wrinkle during their stroke.
  • the membranes 26, 28 divide the interior of the membrane housing sections 22, 24 into a displacement space 34, 36 and an equalization space 38 and 40, respectively.
  • the displacement spaces 34, 36 are connected to one another via corresponding line sections 42, 44 and ball check valves 46, 48 Suction nozzle 50 connected. They are also connected to a pressure port 60 via ball check valves 52, 54 and line sections 56, 58.
  • the compensation spaces 38, 40 are connected to one another via a connecting line 62.
  • An approximately rectangular guide frame 64 is arranged in the housing section 10, on which piston rods 66, 68 are attached at opposite ends.
  • the piston rods extend through slide bearings 70, 72 of the housing section 10, which are lined with plastic bushings 74, 75.
  • the piston rods 66, 68 are connected to the membrane 26 and 28, respectively.
  • a plate 76 or 78 screwed to the piston rod 66, 68 is vulcanized into the central section of the membrane 26, 28.
  • a disk 80 or 82 which is rounded on the circumference, sits between a shoulder of the piston rod 66, 68 and the membrane section, as a result of which the membrane section in question is securely clamped.
  • two round rods 84, 86 are spaced apart in parallel. They consist of a suitable material that is manufactured and available in bars.
  • the guide rods 84, 86 extend through guide bores in a sliding block 88.
  • the guide bores are lined with plastic bushings 90 and 92, respectively.
  • crankshaft 94 is rotatably mounted in the shoulder 12 by means of roller bearings 91, 93.
  • the crankshaft 94 is connected via a clutch 96 to an output shaft 98 of an electric motor 100, not shown in detail.
  • a pin 102 of the crankshaft 94 is mounted in a central bore of the sliding block 88 by means of a roller bearing 104.
  • the housing section 10 is closed off at the end face of the crankshaft 94 by a plate 106 which can be removed.
  • the displacement space 34 has maximum volume.
  • the membrane 26 abuts approximately on the housing section 18, but does not touch it. Touch should be avoided as far as possible since it can damage the membrane.
  • the membrane 28, however, has reached the dead center of its pressure stroke.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
EP95118226A 1994-12-08 1995-11-20 Pompe à membrane double Expired - Lifetime EP0716229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443778A DE4443778A1 (de) 1994-12-08 1994-12-08 Doppelmembranpumpe
DE4443778 1994-12-08

Publications (2)

Publication Number Publication Date
EP0716229A1 true EP0716229A1 (fr) 1996-06-12
EP0716229B1 EP0716229B1 (fr) 1998-06-24

Family

ID=6535323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118226A Expired - Lifetime EP0716229B1 (fr) 1994-12-08 1995-11-20 Pompe à membrane double

Country Status (7)

Country Link
US (1) US5649809A (fr)
EP (1) EP0716229B1 (fr)
JP (1) JP3210851B2 (fr)
AT (1) ATE167728T1 (fr)
BR (1) BR9505698A (fr)
DE (2) DE4443778A1 (fr)
ES (1) ES2119292T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898092A2 (fr) 2006-08-30 2008-03-12 KNF Neuberger GmbH Pompe à membrane dotée d'au moins deux membranes disposées à différents niveaux

Families Citing this family (61)

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Publication number Priority date Publication date Assignee Title
US6257847B1 (en) 1995-08-03 2001-07-10 Medela, Inc. Diaphragm pump and pump for double-breast pumping
US6481986B1 (en) 1995-08-03 2002-11-19 Medela Holding Ag Vacuum adjustment mechanism particularly adapted for a breastpump
TW539918B (en) * 1997-05-27 2003-07-01 Tokyo Electron Ltd Removal of photoresist and photoresist residue from semiconductors using supercritical carbon dioxide process
IT1304282B1 (it) * 1998-05-04 2001-03-13 Annovi Reverberi Spa Gruppo pompante a membrana ad elevata portata.
US6257845B1 (en) 1998-07-14 2001-07-10 Wilden Pump & Engineering Co. Air driven pumps and components therefor
AU4902201A (en) * 1999-11-02 2001-07-03 Tokyo Electron Limited Method and apparatus for supercritical processing of a workpiece
US6748960B1 (en) * 1999-11-02 2004-06-15 Tokyo Electron Limited Apparatus for supercritical processing of multiple workpieces
DE10024546B4 (de) * 2000-05-18 2004-07-15 Lewa Herbert Ott Gmbh + Co Mehrfachkurbeltrieb für Triplexmembranpumpen
TW499548B (en) * 2000-06-02 2002-08-21 Tokyo Electron Ltd Dual diaphragm pump
EP1303870A2 (fr) * 2000-07-26 2003-04-23 Tokyo Electron Limited Chambre de traitement haute pression pour substrat semi-conducteur
DE10133349B4 (de) * 2001-07-15 2006-04-06 Harald Janzen Vierkammer-Membranpumpe
JP4958121B2 (ja) * 2001-10-24 2012-06-20 株式会社タクミナ 往復動ポンプおよび逆止弁
US20030155541A1 (en) * 2002-02-15 2003-08-21 Supercritical Systems, Inc. Pressure enhanced diaphragm valve
US6892624B2 (en) * 2002-05-09 2005-05-17 Aquatec Water Systems, Inc. Enhanced wobble plated driven diaphragm pump
US6901960B2 (en) * 2002-09-06 2005-06-07 Ingersoll-Rand Company Double diaphragm pump including spool valve air motor
US20040069140A1 (en) * 2002-10-10 2004-04-15 Ingersoll-Rand Company Non-metallic pressure caps and diaphragm pump housings incorporating same
US6722642B1 (en) 2002-11-06 2004-04-20 Tokyo Electron Limited High pressure compatible vacuum chuck for semiconductor wafer including lift mechanism
US7077917B2 (en) * 2003-02-10 2006-07-18 Tokyo Electric Limited High-pressure processing chamber for a semiconductor wafer
US6865981B2 (en) * 2003-03-11 2005-03-15 Ingersoll-Rand Company Method of producing a pump
US6883417B2 (en) * 2003-03-19 2005-04-26 Ingersoll-Rand Company Connecting configuration for a diaphragm in a diaphragm pump
BR0301654C5 (pt) * 2003-04-10 2006-01-17 Aurelio Mayorca Sistema e equipamento dinâmico para refrigerar
JP3991990B2 (ja) 2004-01-19 2007-10-17 松下電工株式会社 美顔器
EP1841966B1 (fr) * 2005-01-26 2010-04-28 Panasonic Electric Works Co., Ltd. Pompe a membrane piezoelectrique
US7767145B2 (en) 2005-03-28 2010-08-03 Toyko Electron Limited High pressure fourier transform infrared cell
US8984898B2 (en) * 2005-04-21 2015-03-24 Industrial Research Limited Cryogenic refrigerator system with pressure wave generator
WO2006112741A1 (fr) * 2005-04-21 2006-10-26 Industrial Research Limited Générateur d'ondes de pression
US7789971B2 (en) 2005-05-13 2010-09-07 Tokyo Electron Limited Treatment of substrate using functionalizing agent in supercritical carbon dioxide
US20060269427A1 (en) * 2005-05-26 2006-11-30 Drummond Robert E Jr Miniaturized diaphragm pump with non-resilient seals
DE102007003720B3 (de) * 2007-01-25 2008-08-21 Knf Neuberger Gmbh Membranpumpe mit zwei Membranköpfen und zwei separaten Pumpengehäusen
DE102007014709A1 (de) * 2007-03-23 2008-09-25 Carl Freudenberg Kg Membranpumpe zur Förderung eines Fluids
GB2452047A (en) * 2007-08-21 2009-02-25 Joseph Anthony Griffiths Diaphragm for use in a fluid pump comprising a disc of resilient material whose curvature is formed from a plurality of steps
DE102008005820A1 (de) * 2007-09-11 2009-03-12 Continental Teves Ag & Co. Ohg Motor-Pumpenaggregat
US8529223B2 (en) 2007-10-09 2013-09-10 Thetford Corporation Dual diaphragm pump assembly for a sanitation system
EP4115985A1 (fr) 2008-10-22 2023-01-11 Graco Minnesota Inc. Pulvérisateur sans air portable
US9291158B2 (en) 2009-04-23 2016-03-22 Graco Minnesota Inc. Overmolded diaphragm pump
DE102010013108A1 (de) * 2010-03-26 2011-09-29 Promera Gmbh & Co. Kg Doppelmembranpumpe
JP5389081B2 (ja) * 2011-03-22 2014-01-15 株式会社テクノ高槻 電磁振動型ダイヤフラムポンプ
WO2012155068A2 (fr) * 2011-05-11 2012-11-15 Nereid S.A. Pompe volumétrique à vérins multiples
WO2013022831A1 (fr) * 2011-08-05 2013-02-14 Flow Control Llc. Pompe à membrane d'irrigation à motorisation humaine
CN102518573B (zh) * 2011-12-14 2014-11-26 江南大学 可调式定量注射泵
CN202707394U (zh) * 2012-04-27 2013-01-30 陈绍丽 单连杆联动双腔式计量泵
KR101449300B1 (ko) * 2013-06-14 2014-10-08 양승빈 다이어프램 펌프
US9845794B2 (en) * 2013-10-08 2017-12-19 Ingersoll-Rand Company Hydraulically actuated diaphragm pumps
US20150211509A1 (en) * 2014-01-30 2015-07-30 Blue-White Industries, Ltd. Multiple diaphragm pump
ES2719705T3 (es) 2014-02-07 2019-07-12 Graco Minnesota Inc Bomba de desplazamiento positivo no pulsado y procedimiento de desplazamiento de fluido no pulsado
WO2016134464A1 (fr) * 2015-02-25 2016-09-01 A.H.M.S., Inc. Module de mécanisme d'entraînement pour une pompe à mouvement de va-et-vient
JP2017044178A (ja) * 2015-08-28 2017-03-02 フジクリーン工業株式会社 電磁式ポンプ
DE102016101479A1 (de) * 2016-01-28 2017-08-03 Pierburg Gmbh Membranverdichter
US11007545B2 (en) 2017-01-15 2021-05-18 Graco Minnesota Inc. Handheld airless paint sprayer repair
US10371132B2 (en) * 2017-02-10 2019-08-06 Peopleflo Manufacturing, Inc. Reciprocating pump and transmission assembly having a one-way clutch
IT201700025695A1 (it) * 2017-03-08 2018-09-08 Annovi Reverberi Spa Collettore per pompa
US11221004B2 (en) 2017-07-12 2022-01-11 Blue-White Industries, Ltd. Multiple diaphragm pump
US11022106B2 (en) 2018-01-09 2021-06-01 Graco Minnesota Inc. High-pressure positive displacement plunger pump
CN112368082B (zh) 2018-04-10 2022-11-08 固瑞克明尼苏达有限公司 用于油漆和其他涂料的手持式无气喷涂器
CN115739435A (zh) 2019-05-31 2023-03-07 固瑞克明尼苏达有限公司 手持式流体喷雾器
CN110578674A (zh) * 2019-09-16 2019-12-17 嘉善边锋机械有限公司 电动隔膜泵
CN110617201A (zh) * 2019-10-17 2019-12-27 昆山华誉自动化科技有限公司 一种膜片交替供胶泵和供胶方法
AU2021246059A1 (en) 2020-03-31 2022-10-06 Graco Minnesota Inc. Electrically operated displacement pump
US10968903B1 (en) 2020-06-04 2021-04-06 Graco Minnesota Inc. Handheld sanitary fluid sprayer having resilient polymer pump cylinder
US10926275B1 (en) 2020-06-25 2021-02-23 Graco Minnesota Inc. Electrostatic handheld sprayer
EP3995694B1 (fr) 2020-11-09 2024-05-22 Idromeccanica Bertolini S.p.A. Pompe pour pomper des fluides corrosifs

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255427A (en) * 1925-07-15 1927-10-03 Alexandre Lamblin Improvements in or relating to diaphragm pumps
CH251212A (fr) * 1946-02-05 1947-10-15 Hanvag Ges Fuer Tech Vervollko Pompe à membrane.
BE680073A (fr) * 1966-04-26 1966-10-03
DE2306900A1 (de) * 1973-02-13 1974-08-15 Lothar Pracht Gmbh & Co Kg Mas Hochleistungs-doppelmembran-saugund druckpumpe zur verwendung fuer die grundwasserhaltung
DE3027314A1 (de) * 1980-07-18 1982-02-11 J. Wagner Gmbh, 7990 Friedrichshafen Membranpumpvorrichtung
DE3206242A1 (de) 1982-02-20 1983-09-22 Rudolf 4670 Lünen Leinkenjost Doppelkammer-membranpumpe
DE3141667A1 (de) * 1981-10-21 1983-10-13 Erich 7777 Salem Roser "verdraengerpumpe oder -verdichter fuer fluessige oder gasfoermige medien"
DE8432045U1 (de) 1984-11-02 1985-02-28 Almatec Maschinenbau GmbH, 4100 Duisburg Verbundmembran
DE4309380A1 (de) * 1993-03-23 1994-09-29 Infors Ag Verfahren zur Überwachung eines Systems

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US1397914A (en) * 1920-06-29 1921-11-22 Edwin J Augustin Ammonia-compressor
US1445844A (en) * 1922-02-07 1923-02-20 Mueser Charles Pump
US2063728A (en) * 1933-11-18 1936-12-08 Creamery Package Mfg Co Compressor
FR81610E (fr) * 1962-01-02 1963-10-18 Pompe permettant de refouler des liquides abrasifs ou corrosifs et plus particulièrement adaptée à la pulvérisation de produits utilisés dans le traitement des cultures
IT997335B (it) * 1972-11-06 1975-12-30 Wren Cedric Hewer Motore a combustione interna per fezionato
DE3311104A1 (de) * 1983-03-26 1984-09-27 Erich 7812 Bad Krozingen Becker Membranpumpe
DE3529978A1 (de) * 1985-08-22 1987-03-05 Ashauer Ernst Membranpumpe
US5114321A (en) * 1991-02-12 1992-05-19 Vairex Corporation Fluid displacement apparatus with traveling chambers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255427A (en) * 1925-07-15 1927-10-03 Alexandre Lamblin Improvements in or relating to diaphragm pumps
CH251212A (fr) * 1946-02-05 1947-10-15 Hanvag Ges Fuer Tech Vervollko Pompe à membrane.
BE680073A (fr) * 1966-04-26 1966-10-03
DE2306900A1 (de) * 1973-02-13 1974-08-15 Lothar Pracht Gmbh & Co Kg Mas Hochleistungs-doppelmembran-saugund druckpumpe zur verwendung fuer die grundwasserhaltung
DE3027314A1 (de) * 1980-07-18 1982-02-11 J. Wagner Gmbh, 7990 Friedrichshafen Membranpumpvorrichtung
DE3141667A1 (de) * 1981-10-21 1983-10-13 Erich 7777 Salem Roser "verdraengerpumpe oder -verdichter fuer fluessige oder gasfoermige medien"
DE3206242A1 (de) 1982-02-20 1983-09-22 Rudolf 4670 Lünen Leinkenjost Doppelkammer-membranpumpe
DE8432045U1 (de) 1984-11-02 1985-02-28 Almatec Maschinenbau GmbH, 4100 Duisburg Verbundmembran
DE4309380A1 (de) * 1993-03-23 1994-09-29 Infors Ag Verfahren zur Überwachung eines Systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898092A2 (fr) 2006-08-30 2008-03-12 KNF Neuberger GmbH Pompe à membrane dotée d'au moins deux membranes disposées à différents niveaux
EP1898092A3 (fr) * 2006-08-30 2008-03-19 KNF Neuberger GmbH Pompe à membrane dotée d'au moins deux membranes disposées à différents niveaux

Also Published As

Publication number Publication date
BR9505698A (pt) 1997-11-11
ATE167728T1 (de) 1998-07-15
JP3210851B2 (ja) 2001-09-25
US5649809A (en) 1997-07-22
DE59502649D1 (de) 1998-07-30
EP0716229B1 (fr) 1998-06-24
DE4443778A1 (de) 1996-06-20
JPH08232847A (ja) 1996-09-10
ES2119292T3 (es) 1998-10-01

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