EP0716229B1 - Double diaphragm pump - Google Patents

Double diaphragm pump Download PDF

Info

Publication number
EP0716229B1
EP0716229B1 EP95118226A EP95118226A EP0716229B1 EP 0716229 B1 EP0716229 B1 EP 0716229B1 EP 95118226 A EP95118226 A EP 95118226A EP 95118226 A EP95118226 A EP 95118226A EP 0716229 B1 EP0716229 B1 EP 0716229B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm pump
double diaphragm
pump according
housing section
diaphragms
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
Application number
EP95118226A
Other languages
German (de)
French (fr)
Other versions
EP0716229A1 (en
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/en
Application granted granted Critical
Publication of EP0716229B1 publication Critical patent/EP0716229B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04B43/025—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 generic term of Claim 1.
  • a double diaphragm pump has become known from DE 32 06 242 with a centrally mounted in a housing Pistons with attached to each of its free ends, each a displacement membrane impinged on the pump membrane.
  • the Displacement spaces are with the suction nozzle on the one hand and the pressure port on the other hand connected via check valves.
  • a device is provided for alternating Applying the on to the displacement rooms arranged opposite side of the membranes Pressure chambers for the drive medium. With alternate When exposed to compressed air, the membranes become the same direction moves, the compressed air moving a membrane towards Product space moves and the medium is pumped into the discharge nozzle repressed; the other membrane has an intake stroke out. The pumped medium is therefore compressed air ousted and promoted.
  • Such pumps have a number of advantages. They are safe to run dry and self-priming. A brief overload is also not critical. They are not shaft seals required and no rotating parts in the product stream.
  • the pump sensitive to solids. Impurities and solids can be conveyed in the product stream will. For the rest, displacement is also the case with such a pump can be used for shear sensitive media.
  • the invention has for its object to provide a double diaphragm pump, the is simply constructed and works reliably, and despite the higher pump pressures can be operated with high efficiency.
  • the double diaphragm pump according to the invention is with mechanically driven diaphragms Mistake.
  • the invention provides a guide frame on the opposite sides, the piston rods connected to the membranes are connected.
  • a sliding block is mounted and guided by means of a linear guide.
  • the backdrop stone in turn supports the journal of a front crank, which is connected to the drive motor connected is.
  • Two guides, preferably round rods, are used for linear guidance used.
  • the crank pin is preferably mounted in the sliding block by means of a roller bearing.
  • a roller bearing Of the Sliding block inevitably follows the circular motion of the crank pin, remains but oriented in the same position due to the forced guidance in the management frame, causing it to oscillate along the guides. This gives the guides an oscillating movement in the direction of the positively guided piston rods. On in this way a low-friction, yet mechanically simple transmission of the Rotary movement of the drive motor on the linearly adjustable piston rods reached.
  • the sliding block is preferably guided by means of plastic plain bearings, as is that Piston rod in the corresponding guide holes in the housing.
  • the guide frame with the sliding block is enclosed within a Housing section arranged, the piston rods via plastic sliding bushes are sealed to the outside. If a membrane breaks, it prevents that medium gets into the drive.
  • the housing section has a lateral approach in which the Bearing for the front crank is arranged.
  • the housing section can be a Form the system for the membrane.
  • the membranes have approximately the shape of a Ball cap. This shape ensures that there are no wrinkles in the membrane stroke Membranes are formed, which otherwise easily lead to damage after a certain operating time can.
  • a double diaphragm pump is created, even at higher back pressures due to the mechanical Forced operation works with a high degree of efficiency. It can be driven with an almost constant characteristic curve, comparable to piston pumps, with a certain Restriction made by the elasticity of the membranes must become.
  • the pump according to the invention can therefore be a Deliver the specified delivery rate at a specified pressure. It is small and can be operated quietly
  • the housing of the pump can be made of many materials, for example aluminum, cast iron or stainless steel, each according to the conditions of use. It can also be a plastic case used, for example made of polypropylene, Polytetrafluoroethylene, polyvinylidene fluoride or the like. To protect the membranes against abrasive and against A coating can be used to protect aggressive media PTFE film can be made. Such a membrane is however became known from the G 84 32 2045.
  • the double diaphragm pump shown in Figures 1 and 2 has a first housing section 10, which is box-like and a tubular one going out to one side Approach 12 has.
  • Section 10 and Approach 12 are in one piece shaped, for example from cast aluminum, cast iron, Stainless steel or the like.
  • the flanges 14, 16 are assigned to circular membrane housing sections 22 and 24, which are screwed to the flanges 14, 16.
  • membranes 26 and 28 are clamped in these parts, which have an O-ring-shaped cross section on the circumference, as shown at 30 and 32, respectively. You sit in appropriate Ring 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 go to the displacement space 34 or 36 with PTFE be coated. They are also through fabric inserts reinforced. 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 in one Displacement space 34, 36 and a compensation space 38 or 40.
  • the displacement spaces 34, 36 are over corresponding Line sections 42, 44 and ball check valves 46, 48 connected to a suction nozzle 50. You are also via ball check valves 52, 54 and line sections 56, 58 connected to a pressure port 60.
  • the compensation rooms 38, 40 are connected to one another via a connecting line 62 connected.
  • housing section 10 In the housing section 10 is an approximately rectangular guide frame 64 arranged on the opposite Ends of piston rods 66, 68 are attached.
  • the piston rods extend through slide bearings 70, 72 of the housing section 10, lined with plastic bushings 74, 75 are.
  • the piston rods 66, 68 connected to the membrane 26 or 28.
  • a disc 80 or 82 is seated on the Circumference is rounded between a shoulder of the piston rod 66, 68 and the membrane section, whereby the relevant Membrane section is securely clamped.
  • Two round bars are spaced apart in parallel in the guide frame 64 84, 86 attached. They consist of a suitable one Material that is manufactured and available in bars.
  • the guide rods 84, 86 extend through guide bores of a sliding block 88.
  • the guide holes are lined with plastic bushings 90 and 92 respectively.
  • crankshaft 94 rotatably supported in the neck 12.
  • the Crankshaft 94 is connected to an output shaft via a clutch 96 98 of an electric motor, not shown 100 in drive connection.
  • a pin 102 of the crankshaft 94 is centered by means of a roller bearing 104 Drilled through the sliding block 88 stored.
  • the housing section is for better accessibility 10 on the front side of the crankshaft 94 through a plate 106 completed, which can be removed.
  • crankshaft 94 If the crankshaft 94 is driven, the sliding block 98 inevitably taken. He runs a circling Movement off, but remains up due to the positive guidance the guide rods 84, 86 in the position.
  • the leadership framework 84 is in turn through the piston rods 66, 68 positively guided. This will cause the rotary motion of the crankshaft 94 in an oscillating movement of the piston rods 66, 68 converted.
  • the stroke of the piston rods 66, 68 and so the diaphragms 26, 28 is by the length of the crank arm certainly. If the stroke is to be changed, one is to use another crankshaft 94.
  • Fig. 1 on the left has the displacement space 34 maximum volume.
  • the membrane 26 is approximately on the housing section 18, however, does not touch it. Touching should be avoided if possible, because it can damage the membrane.
  • the membrane 28, however, has reached the dead center of its pressure stroke.
  • a suitable sensor e.g. a pressure sensor
  • the displacement space 34, 36 facing away from the Membranes 26, 28 are monitored to identify a hole or hole Determine the membrane breakage in good time.
  • a suitable sensor e.g. a pressure sensor
  • Such one Pressure sensor can be connected to the connecting line 62 be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The pump has a pair of flexible membranes (26,28) which are mechanically coupled together and attached to respective piston rods (66,68), positioned coaxially on opposite sides of a guide frame (64). The displacement spaces are each coupled to the suction connection (50) on one side and the pressure connection (60) on the other side, via respective non-return valves (46,48,52,54). The frame has at least one linear guide (84,86) for a seating (88) for a crankshaft bearing pin. Pref. the guides are supplied by circular rods fitting through respective bores (90,92) in the seating.

Description

Die Erfindung bezieht sich auf eine doppelt wirkende Membranpumpe (Doppelmembranpumpe) nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a double-acting diaphragm pump (Double diaphragm pump) according to the generic term of Claim 1.

Aus der DE 32 06 242 ist eine Doppelmembranpumpe bekanntgeworden mit einem zentrisch in einem Gehäuse gelagerten Kolben mit an jedem seiner freien Enden befestigten, je einen Verdrängungsraum beaufschlagten Pumpenmembran. Die Verdrängungsräume sind mit dem Saugstutzen einerseits und dem Druckstutzen andererseits über Rückschlagventile verbunden. Ferner ist eine Einrichtung vorgesehen zur wechselweisen Beaufschlagung der auf der zu den Verdrängungsräumen gegenüberliegenden Seite der Membranen angeordneten Druckkammern für das Antriebsmedium. Bei wechselweiser Beaufschlagung mit Druckluft werden die Membranen gleichsinnig bewegt, wobei die Druckluft eine Membran in Richtung Produktraum bewegt und das Fördermedium in den Druckstutzen verdrängt; die andere Membran führt einen Ansaughub aus. Das Fördermedium wird mithin durch Druckluft verdrängt und damit gefördert. A double diaphragm pump has become known from DE 32 06 242 with a centrally mounted in a housing Pistons with attached to each of its free ends, each a displacement membrane impinged on the pump membrane. The Displacement spaces are with the suction nozzle on the one hand and the pressure port on the other hand connected via check valves. Furthermore, a device is provided for alternating Applying the on to the displacement rooms arranged opposite side of the membranes Pressure chambers for the drive medium. With alternate When exposed to compressed air, the membranes become the same direction moves, the compressed air moving a membrane towards Product space moves and the medium is pumped into the discharge nozzle repressed; the other membrane has an intake stroke out. The pumped medium is therefore compressed air ousted and promoted.

Derartige Pumpen haben etliche Vorteile. Sie sind trockenlaufsicher und selbstansaugend. Auch eine kurzzeitige Überbelastung ist unkritisch. Es sind keine Wellenabdichtungen erforderlich und keine rotierenden Teile im Produktstrom. Darüber hinaus ist die Pumpe feststoffumempfindlich. Verunreinigungen und Feststoffe können im Produktstrom mitgefördert werden. Im übrigen ist die Verdrängerförderung bei einer derartigen Pumpe auch für scherempfindliche Medien einsetzbar. Nachteilig ist hingegen, daß vor allen Dingen bei höheren Pumpendrücken, zum Beispiel bis zu 6 bar, wegen der Kompressibilität der Luft eine erhebliche Kompressorleistung zur Verfügung gestellt werden muß. Bei höheren Drücken sind daher derartige Membranpumpen nicht mehr wirtschaftlich einsetzbar.Such pumps have a number of advantages. They are safe to run dry and self-priming. A brief overload is also not critical. They are not shaft seals required and no rotating parts in the product stream. In addition, the pump sensitive to solids. Impurities and solids can be conveyed in the product stream will. For the rest, displacement is also the case with such a pump can be used for shear sensitive media. On the other hand, it is disadvantageous that above all higher pump pressures, for example up to 6 bar, because of the compressibility of the air a significant compressor performance must be made available. At higher Therefore, such diaphragm pumps can no longer be used economically.

Aus der Firmenschrift ,,Membranpumpen Typ Wiking M" der Firma Abel GmbH & Co. Pumpen und Maschinenbau ist bekanntgeworden, die Membran mechanisch anzutreiben. Eine Kolbenstange ist mit einem Kreuzkopf verbunden, der seinerseits an eine Pleuelstange angelenkt ist. Der mechanische Aufwand ist bei einer derartigen Pumpe jedoch erheblich. Außerdem erzeugt eine Einfachmembranpumpe eine stärkere Pulsation und fördert bei gleicher Drehzahl des Antriebs nur 50% des Volumens wie eine Doppelmembranpumpe.From the company publication "Diaphragm Pumps Type Wiking M" from Abel GmbH & Co. Pumps and mechanical engineering have become known for mechanically driving the membrane. A piston rod is connected to a crosshead, which in turn is connected to a connecting rod is articulated. However, the mechanical effort is considerable in such a pump. In addition, a single diaphragm pump creates a stronger pulsation and promotes at the same speed of the drive only 50% of the volume as a double diaphragm pump.

Aus DE 3 141 667 ist eine Doppelmembranpumpe der eingangs genannten Art bekanntgeworden. Die einander gegenüberliegenden Kolbenstangen, die mit jeweils einer Membran verbunden sind, sind mit einem Führungsrahmen in Verbindung, der einen Führungs-Rundstab hält, mit dem ein Kulissenstein zusammenwirkt. Ein Kurbelzapfen einer Motorwelle ist drehbar im Kulissenstein gelagert. Der Motor ist unmittelbar am Pumpengehäuse angebracht, wobei sich die Motorwelle über ein Rollenlager in das Gehäuse der Pumpe hineinerstreckt.From DE 3 141 667 a double diaphragm pump of the type mentioned has become known. The opposing piston rods, each with a membrane are connected to a guide frame, which is a guide rod holds with which a sliding block interacts. A crankpin of an engine shaft is rotatably mounted in the sliding block. The motor is directly on the pump housing attached, with the motor shaft via a roller bearing in the housing of the pump stretched in.

Der Erfindung liegt die Aufgabe zugrunde, eine Doppelmembranpumpe zu schaffen, die einfach aufgebaut ist und betriebssicher arbeitet und die trotz höherer Pumpendrücke mit einem hohen Wirkungsgrad betrieben werden kann. The invention has for its object to provide a double diaphragm pump, the is simply constructed and works reliably, and despite the higher pump pressures can be operated with high efficiency.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. This object is achieved by the features of patent claim 1.

Die erfindungsgemäße Doppelmembranpumpe ist mit mechanisch angetriebenen Membranen versehen. Für die Übertragung der Drehbewegung in die oszillierende der Membranen sieht die Erfindung einen Führungsrahmen vor, an den an gegenüberliegenden Seiten, die mit den Membranen verbundenen Kolbenstangen verbunden sind. Im Führungsrahmen ist ein Kulissenstein gelagert und mittels einer Linearführung geführt. Der Kulissenstein lagert seinerseits den Zapfen einer Stirnkurbel, die mit dem Antriebsmotor verbunden ist. Für die lineare Führung werden zwei Führungen, vorzugsweise Rundstäbe verwendet.The double diaphragm pump according to the invention is with mechanically driven diaphragms Mistake. For the transmission of the rotary motion into the oscillating membrane the invention provides a guide frame on the opposite sides, the piston rods connected to the membranes are connected. In the management framework a sliding block is mounted and guided by means of a linear guide. The backdrop stone in turn supports the journal of a front crank, which is connected to the drive motor connected is. Two guides, preferably round rods, are used for linear guidance used.

Der Kurbelzapfen ist vorzugsweise mittels eines Wälzlagers im Kulissenstein gelagert. Der Kulissenstein macht zwangsläufig die kreisende Bewegung des Kurbelzapfens mit, bleibt jedoch aufgrund der Zwangsführung im Führungsrahmen in der gleichen Lage orientiert, wodurch er sich oszillierend entlang den Führungen bewegt. Die Führungen erhalten dadurch eine oszillierende Bewegung in Richtung der zwangsgeführten Kolbenstangen. Auf diese Weise wird eine reibungsarme, gleichwohl mechanisch einfache Übertragung der Drehbewegung des Antriebsmotors auf die linear verstellbaren Kolbenstangen erreicht. Der Kulissenstein wird vorzugsweise mittels Kunststoffgleitlagern geführt, ebenso wie die Kolbenstange in entsprechenden Führungsbohrungen des Gehäuses.The crank pin is preferably mounted in the sliding block by means of a roller bearing. Of the Sliding block inevitably follows the circular motion of the crank pin, remains but oriented in the same position due to the forced guidance in the management frame, causing it to oscillate along the guides. This gives the guides an oscillating movement in the direction of the positively guided piston rods. On in this way a low-friction, yet mechanically simple transmission of the Rotary movement of the drive motor on the linearly adjustable piston rods reached. The sliding block is preferably guided by means of plastic plain bearings, as is that Piston rod in the corresponding guide holes in the housing.

Bei der Erfindung ist der Führungsrahmen mit dem Kulissenstein innerhalb eines abgeschlossenen Gehäuseabschnitts angeordnet, wobei die Kolbenstangen über Kunststoffgleitbuchsen dichtend nach außen geführt sind. Bei dem Bruch einer Membran wird verhindert, daß Medium in den Antrieb gelangt. Besonders bevorzugt ist eine Ausführungsform der Erfindung, bei der der Gehäuseabschnitt einen seitlichen Ansatz aufweist, in dem das Lager für die Stirnkurbel angeordnet ist. Der Gehäuseabschnitt kann gleichzeitig eine Anlage für die Membran bilden.In the invention, the guide frame with the sliding block is enclosed within a Housing section arranged, the piston rods via plastic sliding bushes are sealed to the outside. If a membrane breaks, it prevents that medium gets into the drive. An embodiment of the is particularly preferred Invention, in which the housing section has a lateral approach in which the Bearing for the front crank is arranged. The housing section can be a Form the system for the membrane.

Nach einer Ausgestaltung der Erfindung haben die Membranen etwa die Form einer Kugelkappe. Diese Form stellt sicher, daß während des Membranhubes keine Falten in der Membran entstehen, welche sonst leicht nach einer gewissen Betriebszeit zu Schäden führen können.According to one embodiment of the invention, the membranes have approximately the shape of a Ball cap. This shape ensures that there are no wrinkles in the membrane stroke Membranes are formed, which otherwise easily lead to damage after a certain operating time can.

Mit der Erfindung ist eine Doppelmembranpumpe geschaffen, die auch bei höheren Gegendrücken aufgrund der mechanischen Zwangsführung mit einem hohen Wirkungsgrad arbeitet. Sie kann mit annähernd konstanter Kennlinie gefahren werden, vergleichbar den Kolbenpumpen, wobei eine gewisse Einschränkung durch die Elastizität der Membranen gemacht werden muß. Die erfindungsgemäße Pumpe kann mithin eine vorgegebene Fördermenge bei einem vorgegebenen Druck fördern. Sie baut klein und kann geräuscharm betrieben werdenWith the invention, a double diaphragm pump is created, even at higher back pressures due to the mechanical Forced operation works with a high degree of efficiency. It can be driven with an almost constant characteristic curve, comparable to piston pumps, with a certain Restriction made by the elasticity of the membranes must become. The pump according to the invention can therefore be a Deliver the specified delivery rate at a specified pressure. It is small and can be operated quietly

Das Gehäuse der Pumpe kann aus vielen Materialien bestehen, beispielswiese Aluminium, Grauguß oder Edelstahl, je nach den Einsatzverhältnissen. Es kann auch ein Kunststoffgehäuse verwendet werden, beispielsweise aus Polypropylen, Polytetrafluorethylen, Polyvinylidenfluorid oder dergleichen. Um die Membranen gegen abrasive und gegen aggressive Medien zu schützen, kann eine Beschichtung mit PTFE-Folie vorgenommen werden. Eine derartige Membran ist jedoch aus dem G 84 32 2045 bekanntgeworden.The housing of the pump can be made of many materials, for example aluminum, cast iron or stainless steel, each according to the conditions of use. It can also be a plastic case used, for example made of polypropylene, Polytetrafluoroethylene, polyvinylidene fluoride or the like. To protect the membranes against abrasive and against A coating can be used to protect aggressive media PTFE film can be made. Such a membrane is however became known from the G 84 32 2045.

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt einen Schnitt durch eine Doppelmembranpumpe nach der Erfindung
Fig. 2
zeigt einen Schnitt durch die Darstellung nach Fig. 1 entlang der Linie 2-2.
The invention is explained in more detail below with reference to drawings.
Fig. 1
shows a section through a double diaphragm pump according to the invention
Fig. 2
shows a section through the representation of FIG. 1 along the line 2-2.

Die in den Figuren 1 und 2 dargestellte Doppelmembranpumpe weist einen ersten Gehäuseabschnitt 10 auf, der kastenartig ist und einen zu einer Seite abgehenden rohrartigen Ansatz 12 aufweist. Abschnitt 10 und Ansatz 12 sind einteilig geformt, beispielsweise aus Aluminiumguß, Grauguß, Edelstahl oder dergleichen. Mit dem Gehäuseabschnitt 10 sind Flansche 14, 16 geformt, die über schwachkugelige Wandabschnitte 18, 20 mit den Stirnseiten des Gehäuseabschnitts 10 verbunden sind. Den Flanschen 14, 16 sind kreisförmige Membrangehäuseabschnitte 22 bzw. 24 zugeordnet, die mit den Flanschen 14, 16 verschraubt sind. Zwischen diesen Teilen sind Membranen 26 bzw. 28 eingespannt, die am Umfang einen O-ringförmigen Querschnitt aufweisen, wie bei 30 bzw. 32 dargestellt. Sie sitzen in entsprechenden Ringnuten von Flansch 14, 16 bzw. Gehäuseabschnitt 22, 24, so daß die Membranen 26, 28 sicher gehalten sind.The double diaphragm pump shown in Figures 1 and 2 has a first housing section 10, which is box-like and a tubular one going out to one side Approach 12 has. Section 10 and Approach 12 are in one piece shaped, for example from cast aluminum, cast iron, Stainless steel or the like. With the housing section 10 are flanges 14, 16 shaped over weak spherical Wall sections 18, 20 with the end faces of the housing section 10 are connected. The flanges 14, 16 are assigned to circular membrane housing sections 22 and 24, which are screwed to the flanges 14, 16. Between membranes 26 and 28 are clamped in these parts, which have an O-ring-shaped cross section on the circumference, as shown at 30 and 32, respectively. You sit in appropriate Ring grooves of flange 14, 16 or housing section 22, 24, so that the membranes 26, 28 are held securely.

Die Membranen 26, 28 sind aus einem geeigneten Elastomer und können zum Verdrängungsraum 34 bzw. 36 hin mit PTFE beschichtet sein. Außerdem sind sie durch Gewebeeinlagen verstärkt. Die Membranen 26, 28 haben annähernd Kugelkappenform. Sie werfen daher bei ihrem Hub keine Falten auf.The membranes 26, 28 are made of a suitable elastomer and can go to the displacement space 34 or 36 with PTFE be coated. They are also through fabric inserts reinforced. The membranes 26, 28 have an approximately spherical cap shape. Therefore, they do not wrinkle during their stroke.

Wie schon erwähnt, unterteilen die Membranen 26, 28 den Innenraum der Membrangehäuseabschnitte 22, 24 in einen Verdrängungsraum 34, 36 und einen Ausgleichsraum 38 bzw. 40. Die Verdrängungsräume 34, 36 sind über entsprechende Leitungsabschnitte 42, 44 und Kugelrückschlagventile 46, 48 mit einem Saugstutzen 50 verbunden. Sie sind außerdem über Kugelrückschlagventile 52, 54 und Leitungsabschnitte 56, 58 mit einem Druckstutzen 60 verbunden. Die Ausgleichsräume 38, 40 sind über eine Verbindungsleitung 62 miteinander verbunden.As already mentioned, the membranes 26, 28 divide the Interior of the membrane housing sections 22, 24 in one Displacement space 34, 36 and a compensation space 38 or 40. The displacement spaces 34, 36 are over corresponding Line sections 42, 44 and ball check valves 46, 48 connected to a suction nozzle 50. You are also via ball check valves 52, 54 and line sections 56, 58 connected to a pressure port 60. The compensation rooms 38, 40 are connected to one another via a connecting line 62 connected.

Im Gehäuseabschnitt 10 ist ein annähernd rechteckiger Führungsrahmen 64 angeordnet, an dem an gegenüberliegenden Enden Kolbenstangen 66, 68 angebracht sind. Die Kolbenstangen erstrecken sich durch Gleitlager 70, 72 des Gehäuseabschnitts 10, die mit Kunststoffbuchsen 74, 75 ausgekleidet sind. An den Enden sind die Kolbenstangen 66, 68 mit der Membran 26 bzw. 28 verbunden. Zu diesem Zweck ist ein mit der Kolbenstange 66, 68 verschraubter Teller 76 bzw. 78 in den mittleren Abschnitt der Membran 26, 28 einvulkanisiert. Ferner sitzt eine Scheibe 80 bzw. 82, die am Umfang gerundet ist, zwischen einem Absatz der Kolbenstange 66, 68 und dem Membranabschnitt, wodurch der betreffende Membranabschnitt sicher eingespannt ist.In the housing section 10 is an approximately rectangular guide frame 64 arranged on the opposite Ends of piston rods 66, 68 are attached. The piston rods extend through slide bearings 70, 72 of the housing section 10, lined with plastic bushings 74, 75 are. At the ends are the piston rods 66, 68 connected to the membrane 26 or 28. For this purpose a plate 76 screwed to the piston rod 66, 68 or 78 vulcanized into the central portion of the membrane 26, 28. Furthermore, a disc 80 or 82 is seated on the Circumference is rounded between a shoulder of the piston rod 66, 68 and the membrane section, whereby the relevant Membrane section is securely clamped.

Im Führungsrahmen 64 sind parallel beabstandet zwei Rundstäbe 84, 86 befestigt. Sie bestehen aus einem geeigneten Material, das stangenweise gefertigt und erhältlich ist. Die Führungsstäbe 84, 86 erstrecken sich durch Führungsbohrungen eines Kulissensteins 88. Die Führungsbohrungen sind mit Kunststoffbuchsen 90 bzw. 92 ausgekleidet.Two round bars are spaced apart in parallel in the guide frame 64 84, 86 attached. They consist of a suitable one Material that is manufactured and available in bars. The guide rods 84, 86 extend through guide bores of a sliding block 88. The guide holes are lined with plastic bushings 90 and 92 respectively.

Wie aus Fig. 2 zu erkennen, ist mittels Wälzlagern 91, 93 eine Kurbelwelle 94 im Ansatz 12 drehbar gelagert. Die Kurbelwelle 94 steht über eine Kupplung 96 mit einer Abtriebswelle 98 eines nicht näher dargestellten Elektromotors 100 in Antriebsverbindung. Ein Zapfen 102 der Kurbelwelle 94 ist mittels eines Wälzlagers 104 in einer mittigen Durchbohrung des Kulissensteins 88 gelagert.As can be seen from FIG. 2, by means of roller bearings 91, 93 a crankshaft 94 rotatably supported in the neck 12. The Crankshaft 94 is connected to an output shaft via a clutch 96 98 of an electric motor, not shown 100 in drive connection. A pin 102 of the crankshaft 94 is centered by means of a roller bearing 104 Drilled through the sliding block 88 stored.

Der besseren Zugänglichkeit wegen ist der Gehäuseabschnitt 10 an der Stirnseite der Kurbelwelle 94 durch eine Platte 106 abgeschlossen, die entfernt werden kann.The housing section is for better accessibility 10 on the front side of the crankshaft 94 through a plate 106 completed, which can be removed.

Wird die Kurbelwelle 94 angetrieben, wird der Kulissenstein 98 zwangsläufig mitgenommen. Er führt eine kreisende Bewegung aus, bleibt jedoch durch die Zwangsführung auf den Führungsstäben 84, 86 in der Lage orientiert. Der Führungsrahmen 84 ist seinerseits durch die Kolbenstangen 66, 68 zwangsgeführt. Dadurch wird die Drehbewegung der Kurbelwelle 94 in eine osizillierende Bewegung der Kolbenstangen 66, 68 umgewandelt. Der Hub der Kolbenstangen 66, 68 und damit der Membranen 26, 28 ist durch die Länge des Kurbelarms bestimmt. Soll der Hub verändert werden, ist eine andere Kurbelwelle 94 einzusetzen.If the crankshaft 94 is driven, the sliding block 98 inevitably taken. He runs a circling Movement off, but remains up due to the positive guidance the guide rods 84, 86 in the position. The leadership framework 84 is in turn through the piston rods 66, 68 positively guided. This will cause the rotary motion of the crankshaft 94 in an oscillating movement of the piston rods 66, 68 converted. The stroke of the piston rods 66, 68 and so the diaphragms 26, 28 is by the length of the crank arm certainly. If the stroke is to be changed, one is to use another crankshaft 94.

Am Ende des Saughubs in Fig. 1 links hat der Verdrängungsraum 34 maximales Volumen. Die Membran 26 liegt annähernd am Gehäuseabschnitt 18 an, berührt ihn indessen nicht. Eine Berührung muß nach Möglichkeit vermieden werden, da sie zur Beschädigung der Membran führen kann. Die Membran 28 hingegen hat den Totpunkt ihres Druckhubes erreicht.At the end of the suction stroke in Fig. 1 on the left has the displacement space 34 maximum volume. The membrane 26 is approximately on the housing section 18, however, does not touch it. Touching should be avoided if possible, because it can damage the membrane. The membrane 28, however, has reached the dead center of its pressure stroke.

Mit einem geeigneten Sensor, z.B. einem Druckaufnehmer, kann die dem Verdrängungsraum 34, 36 abgewandte Seite der Membranen 26, 28 überwacht werden, um ein Loch oder einen Bruch der Membranen rechtzeitig festzustellen. Ein derartiger Druckaufnehmer kann an die Verbindungsleitung 62 angeschlossen sein.With a suitable sensor, e.g. a pressure sensor, can the displacement space 34, 36 facing away from the Membranes 26, 28 are monitored to identify a hole or hole Determine the membrane breakage in good time. Such one Pressure sensor can be connected to the connecting line 62 be.

Claims (9)

  1. A double diaphragm pump having flexible diaphragms (26,28) disposed in displacement spaces and connected and mechanically coupled to piston rods (66,68), the displacement spaces being communicated via check valves to a suction manifold on the one hand and to a pressure manifold on the other hand, with each diaphragm (26,28) being connected to a piston rod (66,68), which piston rods extend coaxially and are mounted on opposite sides to a guide frame (64) having at least one lineal guide (84,86) for a slide block (88) which rotably mounts a crank pin (102) of a crank shaft (94), characterized in that the guide frame (64) comprises two lineal guides (84,86) for the slide block (88), the guide frame (64) is received in a closed housing section (10), and the piston rods (66,68) are slidingly and sealingly mounted in plastic sleeves (74) of the housing section (10).
  2. A double diaphragm pump according to claim 1, characterized in that the lineal guide comprises round rods (84,86) and the slide block (88) includes corresponding guide bores (90,92).
  3. A double diaphragm pump according to claim 1 or 2, characterized in that said guide bores in the slide block (88) are provided with plastic sleeves (90,92).
  4. A double diaphragm pump according to any of the claims 1 to 3, characterized in that the closed housing section (10) comprises a lateral extension (2) receiving bearings (1,3) for a crankshaft (94).
  5. A double diaphragm pump according to any of the claims 1 to 4, characterized in that the diaphragms (26,28) are substantially in the form of spherical caps.
  6. A double diaphragm pump according to any of the claims 1 to 5, characterized in that each of said piston rods (66,68) is connected to a plate (72,78) vulcanized into the associated diaphragm (26,28) and that diaphragms (26,28) each are fixed between its respective plate (76,78) and a disk (80,82) mounted on the respective piston rod (66,68).
  7. A double diaphragm pump according to any of the claims 1 to 6, characterized in that the sides of the diaphragms (26,28) remote from their respective displacement space (34,36) are communicated to each other via a communication line (62).
  8. A double diaphragm pump according to any of the claims 1 to 7, characterized in that the sides of the diaphragm remote from their respective displacement spaces (34,36) are monitored via a pressure sensor or other detector.
  9. A double diaphragm pump according to any of the claims 1 to 8, characterized in that the closed housing section (10) is mounted by flanges (14,16) inside the pump housing, with the flanges (14,16) being connected to the faces of the housing section (10) by slightly spherical wall portions (18,20) and with the slightly spherical wall section (18,20) limiting the stroke of the diaphragms (26,28) at one side.
EP95118226A 1994-12-08 1995-11-20 Double diaphragm pump Expired - Lifetime EP0716229B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443778 1994-12-08
DE4443778A DE4443778A1 (en) 1994-12-08 1994-12-08 Double diaphragm pump

Publications (2)

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

Family

ID=6535323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118226A Expired - Lifetime EP0716229B1 (en) 1994-12-08 1995-11-20 Double diaphragm pump

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102518573A (en) * 2011-12-14 2012-06-27 江南大学 Adjustable quantitative injection pump

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481986B1 (en) 1995-08-03 2002-11-19 Medela Holding Ag Vacuum adjustment mechanism particularly adapted for a breastpump
US6257847B1 (en) * 1995-08-03 2001-07-10 Medela, Inc. Diaphragm pump and pump for double-breast pumping
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 (en) * 1998-05-04 2001-03-13 Annovi Reverberi Spa HIGH CAPACITY MEMBRANE PUMPING GROUP.
US6257845B1 (en) 1998-07-14 2001-07-10 Wilden Pump & Engineering Co. Air driven pumps and components therefor
US6748960B1 (en) 1999-11-02 2004-06-15 Tokyo Electron Limited Apparatus for supercritical processing of multiple workpieces
CA2387341A1 (en) * 1999-11-02 2001-05-10 Tokyo Electron Limited Method and apparatus for supercritical processing of multiple workpieces
DE10024546B4 (en) * 2000-05-18 2004-07-15 Lewa Herbert Ott Gmbh + Co Multiple crank drive for triplex diaphragm pumps
TW499548B (en) * 2000-06-02 2002-08-21 Tokyo Electron Ltd Dual diaphragm pump
AU2001290171A1 (en) * 2000-07-26 2002-02-05 Tokyo Electron Limited High pressure processing chamber for semiconductor substrate
DE20109650U1 (en) 2001-06-09 2001-08-23 ABEL GmbH & Co. KG, 21514 Büchen Electromechanically driven double diaphragm pump
DE10133349B4 (en) * 2001-07-15 2006-04-06 Harald Janzen Four chamber diaphragm pump
JP4958121B2 (en) * 2001-10-24 2012-06-20 株式会社タクミナ Reciprocating pump and check valve
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 (en) * 2003-04-10 2006-01-17 Aurelio Mayorca Dynamic cooling system and equipment
JP3991990B2 (en) 2004-01-19 2007-10-17 松下電工株式会社 Facial massager
DE602006013936D1 (en) * 2005-01-26 2010-06-10 Panasonic Elec Works Co Ltd PIEZOLELECTRICALLY OPERATED DIAPHRAGM PUMP
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 (en) * 2005-04-21 2006-10-26 Industrial Research Limited Pressure wave generator
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
DE102006046567B3 (en) 2006-08-30 2008-03-06 Knf Neuberger Gmbh Diaphragm pump has two diaphragms which are moved relative to each other in axial direction at same value as piston rods at places turned away from each other
DE102007003720B3 (en) * 2007-01-25 2008-08-21 Knf Neuberger Gmbh Diaphragm pump with two membrane heads and two separate pump housings
DE102007014709A1 (en) * 2007-03-23 2008-09-25 Carl Freudenberg Kg Diaphragm pump for conveying a fluid
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 (en) * 2007-09-11 2009-03-12 Continental Teves Ag & Co. Ohg Motor-pump unit
US8529223B2 (en) 2007-10-09 2013-09-10 Thetford Corporation Dual diaphragm pump assembly for a sanitation system
EP4397859A2 (en) 2008-10-22 2024-07-10 Graco Minnesota Inc. Portable airless sprayer
WO2010123965A2 (en) 2009-04-23 2010-10-28 Graco Minnesota Inc. Overmolded diaphragm pump
DE102010013108A1 (en) * 2010-03-26 2011-09-29 Promera Gmbh & Co. Kg Double diaphragm pump
JP5389081B2 (en) * 2011-03-22 2014-01-15 株式会社テクノ高槻 Electromagnetic vibration type diaphragm pump
WO2012155068A2 (en) * 2011-05-11 2012-11-15 Nereid S.A. A positive displacement multi-cyclinder pump
US9151282B2 (en) 2011-08-05 2015-10-06 Flow Control Llc. Human powered irrigation diaphragm pump
CN202707394U (en) * 2012-04-27 2013-01-30 陈绍丽 Single connecting rod linkage double-cavity metering pump
KR101449300B1 (en) * 2013-06-14 2014-10-08 양승빈 Diaphragm pump
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
US9784265B2 (en) * 2014-02-07 2017-10-10 Graco Minnesota Inc. Electric drive system for a pulseless positive displacement pump
WO2016134464A1 (en) * 2015-02-25 2016-09-01 A.H.M.S., Inc. Drive mechanism module for a reciprocating pump
JP2017044178A (en) * 2015-08-28 2017-03-02 フジクリーン工業株式会社 Electromagnetic pump
DE102016101479A1 (en) * 2016-01-28 2017-08-03 Pierburg Gmbh diaphragm compressors
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 (en) * 2017-03-08 2018-09-08 Annovi Reverberi Spa Manifold for pump
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
US11986850B2 (en) 2018-04-10 2024-05-21 Graco Minnesota Inc. Handheld airless sprayer for paints and other coatings
TW202110541A (en) 2019-05-31 2021-03-16 美商葛萊兒明尼蘇達股份有限公司 Handheld fluid sprayer
CN110578674A (en) * 2019-09-16 2019-12-17 嘉善边锋机械有限公司 Electric diaphragm pump
CN110617201A (en) * 2019-10-17 2019-12-27 昆山华誉自动化科技有限公司 Diaphragm alternative glue supply pump and method
EP4127471A1 (en) 2020-03-31 2023-02-08 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 (en) 2020-11-09 2024-05-22 Idromeccanica Bertolini S.p.A. Pump for pumping corrosive fluids

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397914A (en) * 1920-06-29 1921-11-22 Edwin J Augustin Ammonia-compressor
US1445844A (en) * 1922-02-07 1923-02-20 Mueser Charles Pump
GB255427A (en) * 1925-07-15 1927-10-03 Alexandre Lamblin Improvements in or relating to diaphragm pumps
US2063728A (en) * 1933-11-18 1936-12-08 Creamery Package Mfg Co Compressor
CH251212A (en) * 1946-02-05 1947-10-15 Hanvag Ges Fuer Tech Vervollko Diaphragm pump.
FR81610E (en) * 1962-01-02 1963-10-18 Pump for pumping abrasive or corrosive liquids and more particularly suitable for spraying products used in crop treatment
BE680073A (en) * 1966-04-26 1966-10-03
IT997335B (en) * 1972-11-06 1975-12-30 Wren Cedric Hewer INTERNAL COMBUSTION ENGINE FOR FEZIONATO
DE2306900A1 (en) * 1973-02-13 1974-08-15 Lothar Pracht Gmbh & Co Kg Mas HIGH PERFORMANCE DOUBLE DIAPHRAGM SUCTION AND PRESSURE PUMP FOR USE FOR GROUNDWATER MAINTENANCE
DE3027314A1 (en) * 1980-07-18 1982-02-11 J. Wagner Gmbh, 7990 Friedrichshafen Membrane pump for high pressures - has interchangeable pumping units mounted on separate drive unit
DE3141667A1 (en) * 1981-10-21 1983-10-13 Erich 7777 Salem Roser Displacement pump or compressor for liquid or gaseous media
DE3206242A1 (en) 1982-02-20 1983-09-22 Rudolf 4670 Lünen Leinkenjost Double chamber diaphragm pump
DE3311104A1 (en) * 1983-03-26 1984-09-27 Erich 7812 Bad Krozingen Becker Diaphragm pump
DE8432045U1 (en) 1984-11-02 1985-02-28 Almatec Maschinenbau GmbH, 4100 Duisburg COMPOSITE MEMBRANE
DE3529978A1 (en) * 1985-08-22 1987-03-05 Ashauer Ernst Diaphragm pump
US5114321A (en) * 1991-02-12 1992-05-19 Vairex Corporation Fluid displacement apparatus with traveling chambers
DE4309380C2 (en) * 1993-03-23 2000-01-05 Infors Ag Bottmingen System monitoring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102518573A (en) * 2011-12-14 2012-06-27 江南大学 Adjustable quantitative injection pump
CN102518573B (en) * 2011-12-14 2014-11-26 江南大学 Adjustable quantitative injection pump

Also Published As

Publication number Publication date
DE59502649D1 (en) 1998-07-30
US5649809A (en) 1997-07-22
EP0716229A1 (en) 1996-06-12
JPH08232847A (en) 1996-09-10
JP3210851B2 (en) 2001-09-25
BR9505698A (en) 1997-11-11
ES2119292T3 (en) 1998-10-01
ATE167728T1 (en) 1998-07-15
DE4443778A1 (en) 1996-06-20

Similar Documents

Publication Publication Date Title
EP0716229B1 (en) Double diaphragm pump
EP2761180A2 (en) Positive displacement pump and operating method thereof
EP2912310B1 (en) Piston membrane pump
DE2502566B2 (en) Diaphragm pump
DE4244619A1 (en) Method for operating a diaphragm pump and diaphragm pump for performing the method
DE2644033C2 (en) Inclined drum axial piston pump or motor
DE2333380C2 (en) Hydraulic machine
DE4401836C2 (en) Axial piston compressor with several pistons
DE2853916C2 (en) Diaphragm pump with a ring diaphragm
DE3027314A1 (en) Membrane pump for high pressures - has interchangeable pumping units mounted on separate drive unit
DE9420493U1 (en) Double diaphragm pump
DE102005017476A1 (en) Piston diaphragm or piston pump
DE3917207C2 (en)
DE10133349B4 (en) Four chamber diaphragm pump
DE2857091C1 (en) Diaphragm displacement pump
DE96813C (en)
AT245941B (en) Rotary lobe pump
DE146483C (en) Peristaltic pump.
DE957015C (en) Adjustable high pressure fluid pump or motor with several pistons
DE2000375A1 (en) Gas pump or compressor
DE1114275B (en) Piston compressor with a piston connected at the end with a clamped rolling diaphragm
DE4320963A1 (en) Double positive displacement pump
DE102007036779A1 (en) Piston compressor, especially for air conditioning system, has working cylinder rotatable about rotation axis perpendicular to axis of motion, guide rod arranged in housing parallel to rotation axis passes through elongated hole in piston
DE3150976A1 (en) Pneumatically driven double diaphragm pump
DE2611672A1 (en) Eccentric worm drive peristaltic pump - has double threaded interior hollow worm and double walled hose membrane passing through

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE DK ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19960514

17Q First examination report despatched

Effective date: 19970311

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE DK ES FR GB IT NL SE

REF Corresponds to:

Ref document number: 167728

Country of ref document: AT

Date of ref document: 19980715

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980624

REF Corresponds to:

Ref document number: 59502649

Country of ref document: DE

Date of ref document: 19980730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980924

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2119292

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: ABEL G.M.B.H. & CO. HANDELS- + VERWALTUNGSGESELLS

Effective date: 19981130

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20141120

Year of fee payment: 20

Ref country code: SE

Payment date: 20141120

Year of fee payment: 20

Ref country code: ES

Payment date: 20141120

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20141120

Year of fee payment: 20

Ref country code: FR

Payment date: 20141118

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20141125

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150114

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59502649

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20151119

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20151119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20151119

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20160226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20151121