EP3567248A1 - Method for operating a multiple membrane pump - Google Patents

Method for operating a multiple membrane pump Download PDF

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Publication number
EP3567248A1
EP3567248A1 EP19172525.8A EP19172525A EP3567248A1 EP 3567248 A1 EP3567248 A1 EP 3567248A1 EP 19172525 A EP19172525 A EP 19172525A EP 3567248 A1 EP3567248 A1 EP 3567248A1
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EP
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Prior art keywords
drive
diaphragm pump
pump
diaphragms
operating
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EP19172525.8A
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German (de)
French (fr)
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EP3567248B1 (en
Inventor
Heinz Lutz
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Lutz Holding GmbH
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Lutz Holding GmbH
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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
    • 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
    • F04B43/04—Pumps having electric drive
    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • 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
    • 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

Definitions

  • the present invention relates to a method for operating a multi-diaphragm pump having a pump housing with a plurality of recorded in parallel line sections membrane chambers, each enclosed between a plurality of in the same direction closing ball valves and liquid-tight from a membrane in each case a liquid chamber and an air chamber are divided and wherein the Pump housing is also assigned in a arranged between the air chambers drive chamber at least one drive, wherein the drive mechanically connected to the membranes drive means for mutually independent movement of the membrane between each two movement end points and the drive means of the two membranes are moved asynchronously by the at least one drive.
  • Double diaphragm pumps have long been known in the art. They are known to transport even difficult conveyed material and are based on the fact that two membranes in mutually opposite membrane chambers fill a liquid space alternately in a suction movement and in a pressure movement Drain. Ball valves ensure a given conveying direction by blocking the inlet side during the pressure movement and the outlet side during the suction movement.
  • the diaphragms are coupled by means of a rigid connecting shaft and therefore move in a push-pull manner.
  • the prior art preferably provides for actuation of the membranes with compressed air.
  • a compressed air connection is provided, via which compressed air is introduced into a first diaphragm chamber.
  • the membrane chambers are separated by the membrane into an air chamber and a liquid chamber, wherein the compressed air flows into the air chamber and compresses the liquid chamber, whereby the liquid is pressed out of the liquid chamber.
  • the membrane moves away from the opposite chamber, but takes due to the connection with the connecting shaft with the opposite membrane and will compress the air chamber in this, however, inflate the liquid chamber and thus exert a suction effect on the inlet.
  • an air distributor changes the air direction and the air is introduced into the opposite, just first deflated air chamber and the membranes move coupled in the opposite direction.
  • the object of the present invention is to propose a method for operating a multiple diaphragm pump, in which an adapted use of a multiple diaphragm pump, in particular also as a metering pump, is made possible.
  • a multiple diaphragm pump is largely constructed as already known from the prior art with respect to the double diaphragm pump. It comprises a pump housing with a plurality of parallel line sections, which each form a membrane chamber. In the membrane chambers is in each case a membrane which separates the membrane chamber liquid-tight in a liquid chamber and an air chamber. Only the liquid chamber can be reached via the line sections and is limited on the inlet and outlet side by ball valves.
  • the invention now provides, instead of the mechanism operated by compressed air, to provide a drive chamber between the diaphragm chambers, in which one or more drives and drive elements connected thereto are accommodated for mechanical attack on the diaphragms.
  • the drive means are moved by the mechanical force of the at least one drive between two movement end points back and forth and take with the membranes, so that in principle the same sequence of movements initially arises as in the known double diaphragm pump in the prior art.
  • the at least one drive is now operated so that the two or more membranes are now not operated in push-pull, but independently.
  • the output lines of the multi-membrane pump and to use these as a metering pump in which an adjustable current of a second, third or further media is added to a stream of a first medium.
  • this can be done via the use of multiple drives in the drive chamber, which can be controlled via a common process control.
  • Each drive would in this case, according to the control commands of the process control, stimulate the membrane connected to it to lift movements, wherein the amount of medium conveyed by the relevant pump section is dependent on the stroke frequency.
  • the drive means can also be connected to the same drive via different gears. If the gears are immutable, at the same time so that the delivery ratio is always the same. Only by adjustable transmission could be achieved in this case with only one drive nevertheless an adjustable delivery ratio.
  • drives used different solutions can be used, in particular can be used as drives electric motors, hydraulic or pneumatic cylinders or compressed air valves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Doppelmembranpumpen sind im Stand der Technik bereits seit langem bekannt. Dort wird in der Regel ein Stößel verwendet, um beide Membranen im Gegentakt zu betreiben. Es ist aber auch bekannt, eine entsprechende Funktion, ebenfalls im Gegentakt, zu erreichen, wobei mit unabhängigen, jedoch synchronisierten Antrieben gearbeitet wird.Hiervon ausgehend möchte die vorliegende Erfindung die Möglichkeiten allgemein von Mehrfachmembranpumpen effektiver nutzen, indem von einem synchronisierten Betrieb einer solchen Pumpe abgewichen wird. Durch einen ganz entkoppelten Betrieb der Pumpenteile kann mit einer einzigen Pumpe eine Dosierpumpe realisiert werden, bei welcher alle Teile ungleiche Fördermengen durchsetzen, so dass eine vorgebbare Mischung erzeugt werden kann.Double diaphragm pumps have been known for a long time in the prior art. There, a plunger is usually used to operate both membranes in push-pull. However, it is also known to achieve a corresponding function, also in push-pull, using independent but synchronized drives. On this basis, the present invention seeks to make more efficient use of the possibilities generally of multiple diaphragm pumps by deviating from synchronized operation of such a pump becomes. By a completely decoupled operation of the pump parts, a metering pump can be realized with a single pump, in which all parts enforce unequal flow rates, so that a predeterminable mixture can be produced.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Betrieb einer Mehrfachmembranpumpe, welche ein Pumpengehäuse mit mehreren in parallelen Leitungsabschnitten aufgenommenen Membrankammern aufweist, die jeweils zwischen mehreren in Strömungsrichtung gleichsinnig schließenden Kugelventilen eingeschlossen und von einer Membran flüssigkeitsdicht in jeweils eine Flüssigkeitskammer und eine Luftkammer unterteilt sind und wobei dem Pumpengehäuse ferner in einer zwischen den Luftkammern angeordneten Antriebskammer wenigstens ein Antrieb zugeordnet ist, wobei der Antrieb mechanisch mit den Membranen verbundene Antriebsmittel zum voneinander unabhängigen Bewegen der Membran zwischen jeweils zwei Bewegungsendpunkten aufweist und die Antriebsmittel der beiden Membranen von dem wenigstens einen Antrieb asynchron bewegt werden.The present invention relates to a method for operating a multi-diaphragm pump having a pump housing with a plurality of recorded in parallel line sections membrane chambers, each enclosed between a plurality of in the same direction closing ball valves and liquid-tight from a membrane in each case a liquid chamber and an air chamber are divided and wherein the Pump housing is also assigned in a arranged between the air chambers drive chamber at least one drive, wherein the drive mechanically connected to the membranes drive means for mutually independent movement of the membrane between each two movement end points and the drive means of the two membranes are moved asynchronously by the at least one drive.

Eine derartige Lösung im Hinblick auf genau zwei Membranen ist bereits aus der DE 10 2016 121 333 A1 bekannt, wobei weiterer Stand der Technik sich aus der US 4,718,832 A und der US 2012/0063924 A1 ergibt.Such a solution with regard to exactly two membranes is already out of the DE 10 2016 121 333 A1 known, with other prior art arising from the US 4,718,832 A and the US 2012/0063924 A1 results.

Doppelmembranpumpen sind im Stand der Technik bereits seit Langem bekannt. Sie sind dafür bekannt, auch schwieriges Fördergut zu transportieren und basieren darauf, dass zwei Membranen in einander gegenüberliegenden Membrankammern einen Flüssigkeitsraum abwechselnd in einer Saugbewegung füllen und in einer Druckbewegung entleeren. Kugelventile sorgen dabei für eine vorgegebene Förderrichtung, indem sie bei der Druckbewegung die Zulaufseite, bei der Saugbewegung die Ablaufseite blockieren. Die Membranen werden dabei mithilfe einer starren Verbindungswelle gekoppelt und bewegen sich daher im Gegentakt.Double diaphragm pumps have long been known in the art. They are known to transport even difficult conveyed material and are based on the fact that two membranes in mutually opposite membrane chambers fill a liquid space alternately in a suction movement and in a pressure movement Drain. Ball valves ensure a given conveying direction by blocking the inlet side during the pressure movement and the outlet side during the suction movement. The diaphragms are coupled by means of a rigid connecting shaft and therefore move in a push-pull manner.

Der Stand der Technik sieht bevorzugtermaßen eine Betätigung der Membranen mit Druckluft vor. In einer zentralen Kammer ist ein Druckluftanschluss vorgesehen, über welchen Druckluft in eine erste Membrankammer eingebracht wird. Die Membrankammern sind durch die Membran in eine Luftkammer und eine Flüssigkeitskammer getrennt, wobei die Druckluft in die Luftkammer strömt und die Flüssigkeitskammer zusammenpresst, wodurch die Flüssigkeit aus der Flüssigkeitskammer herausgepresst wird. Die Membran bewegt sich dabei von der gegenüberliegenden Kammer weg, nimmt aber aufgrund der Verbindung mithilfe der Verbindungswelle die gegenüberliegende Membran mit und wird bei dieser die Luftkammer zusammendrücken, die Flüssigkeitskammer hingegen aufblähen und damit eine Saugwirkung auf den Zulauf ausüben. Im äußersten Punkt wechselt ein Luftverteiler die Luftrichtung und die Luft wird in die gegenüberliegende, soeben erst entleerte Luftkammer eingebracht und die Membranen bewegen sich gekoppelt in die Gegenrichtung.The prior art preferably provides for actuation of the membranes with compressed air. In a central chamber, a compressed air connection is provided, via which compressed air is introduced into a first diaphragm chamber. The membrane chambers are separated by the membrane into an air chamber and a liquid chamber, wherein the compressed air flows into the air chamber and compresses the liquid chamber, whereby the liquid is pressed out of the liquid chamber. The membrane moves away from the opposite chamber, but takes due to the connection with the connecting shaft with the opposite membrane and will compress the air chamber in this, however, inflate the liquid chamber and thus exert a suction effect on the inlet. At the extreme point, an air distributor changes the air direction and the air is introduced into the opposite, just first deflated air chamber and the membranes move coupled in the opposite direction.

Ein bekanntes Verfahren aus der FR 54 797 E1 sieht ergänzend zwar vor, dass die beiden Membranen nicht direkt miteinander verbunden sind, sondern separat für sich, gleichwohl aber synchron zueinander betrieben werden.A well-known method from the FR 54 797 E1 In addition, it provides for the fact that the two membranes are not directly connected with each other, but are operated separately for themselves, but nevertheless synchronously with one another.

Ein solches Verfahren, sei es mit separaten oder durchverbundenen Membranen, bewirkt allerdings, dass die Membranen sich immer im Gegentakt bewegen und folglich auch die gleichen Fördermengen bewegen.However, such a process, whether with separate or interconnected membranes, causes the membranes to always move in a push-pull manner and consequently also move the same flow rates.

Vor diesem Hintergrund liegt der vorliegenden Erfindung die Aufgabe zu Grunde, ein Verfahren zum Betrieb einer Mehrfachmembranpumpe vorzuschlagen, bei dem eine angepasste Nutzung einer Mehrfachmembranpumpe insbesondere auch als Dosierpumpe ermöglicht wird.Against this background, the object of the present invention is to propose a method for operating a multiple diaphragm pump, in which an adapted use of a multiple diaphragm pump, in particular also as a metering pump, is made possible.

Dies gelingt durch ein Verfahren zum Betrieb einer Mehrfachmembranpumpe gemäß den Merkmalen des Anspruchs 1. Sinnvolle Weiterentwicklungen eines solchen Verfahrens zum Betrieb einer Mehrfachmembranpumpe sind den Unteransprüchen zu entnehmen.This is achieved by a method for operating a multiple diaphragm pump according to the features of claim 1. Meaningful developments of such a method for operating a multiple diaphragm pump can be found in the dependent claims.

Erfindungsgemäß ist vorgesehen, dass eine Mehrfachmembranpumpe weitgehend so aufgebaut ist, wie dies hinsichtlich der Doppelmembranpumpe aus dem Stand der Technik vorbekannt ist. Sie umfasst ein Pumpengehäuse mit mehreren parallelen Leitungsabschnitten, welche jeweils eine Membrankammer ausbilden. In den Membrankammern befindet sich jeweils eine Membran, welche die Membrankammer flüssigkeitsdicht in eine Flüssigkeitskammer und eine Luftkammer trennt. Lediglich die Flüssigkeitskammer ist über die Leitungsabschnitte erreichbar und ist zu- und ablaufseitig durch Kugelventile begrenzt.According to the invention, it is provided that a multiple diaphragm pump is largely constructed as already known from the prior art with respect to the double diaphragm pump. It comprises a pump housing with a plurality of parallel line sections, which each form a membrane chamber. In the membrane chambers is in each case a membrane which separates the membrane chamber liquid-tight in a liquid chamber and an air chamber. Only the liquid chamber can be reached via the line sections and is limited on the inlet and outlet side by ball valves.

Die Erfindung sieht nun vor, anstelle des mit Druckluft betriebenen Mechanismus eine Antriebskammer zwischen den Membrankammern vorzusehen, in welcher ein oder mehrere Antriebe und mit diesem verbundene Antriebselemente zum mechanischen Angriff an den Membranen aufgenommen sind. Die Antriebsmittel werden durch die mechanische Kraft des wenigstens einen Antriebs zwischen zwei Bewegungsendpunkten hin und her bewegt und nehmen dabei die Membranen mit, so dass zunächst prinzipiell der gleiche Bewegungsablauf entsteht wie bei der bekannten Doppelmembranpumpe im Stand der Technik.The invention now provides, instead of the mechanism operated by compressed air, to provide a drive chamber between the diaphragm chambers, in which one or more drives and drive elements connected thereto are accommodated for mechanical attack on the diaphragms. The drive means are moved by the mechanical force of the at least one drive between two movement end points back and forth and take with the membranes, so that in principle the same sequence of movements initially arises as in the known double diaphragm pump in the prior art.

Der Unterschied besteht jedoch darin, dass der wenigstens eine Antrieb nunmehr so betrieben wird, dass die zwei oder mehr Membranen nunmehr nicht im Gegentakt, sondern unabhängig voneinander betrieben werden. Hierdurch ist es nun möglich, die Ausgangsleitungen der Mehrfachmembranpumpe zusammenzuführen und diese als Dosierpumpe einzusetzen, in welcher zu einem Strom eines ersten Mediums ein einstellbarer Strom eines zweiten, dritten oder weiteren Medien hinzugefügt wird.The difference, however, is that the at least one drive is now operated so that the two or more membranes are now not operated in push-pull, but independently. As a result, it is now possible to combine the output lines of the multi-membrane pump and to use these as a metering pump in which an adjustable current of a second, third or further media is added to a stream of a first medium.

In einer ersten Variante der Erfindung kann dies über die Nutzung mehrerer Antriebe in der Antriebskammer erfolgen, die etwa über eine gemeinsame Prozesssteuerung gesteuert werden können. Jeder Antrieb würde in diesem Fall gemäß den Steuerbefehlen der Prozesssteuerung die mit ihm verbundene Membran zu Hubbewegungen anregen, wobei die von dem betroffenen Pumpenabschnitt geförderte Menge an Medium von der Hubfrequenz abhängig ist.In a first variant of the invention, this can be done via the use of multiple drives in the drive chamber, which can be controlled via a common process control. Each drive would in this case, according to the control commands of the process control, stimulate the membrane connected to it to lift movements, wherein the amount of medium conveyed by the relevant pump section is dependent on the stroke frequency.

Alternativ können die Antriebsmittel aber auch über unterschiedliche Getriebe mit demselben Antrieb verbunden sein. Sofern die Getriebe hierbei unveränderlich sind, ist gleichzeitig damit auch das Förderverhältnis stets gleich. Lediglich durch einstellbare Getriebe könnte in diesem Fall mit lediglich einem Antrieb dennoch ein einstellbares Förderverhältnis erreicht werden.Alternatively, however, the drive means can also be connected to the same drive via different gears. If the gears are immutable, at the same time so that the delivery ratio is always the same. Only by adjustable transmission could be achieved in this case with only one drive nevertheless an adjustable delivery ratio.

Im Hinblick auf die verwendeten Antriebe können unterschiedliche Lösungen genutzt werden, insbesondere können als Antriebe elektrische Motoren, hydraulische oder pneumatische Zylinder oder Druckluftventile verwendet werden.With regard to the drives used different solutions can be used, in particular can be used as drives electric motors, hydraulic or pneumatic cylinders or compressed air valves.

Vorstehend beschrieben ist somit ein Verfahren zum Betrieb einer Mehrfachmembranpumpe, welches eine asynchrone Ansteuerung der beiden Membranen vorsieht und es somit erlaubt, eine Mehrfachmembranpumpe als Dosierpumpe zu benutzen.Thus, what has been described above is a method of operating a multiple diaphragm pump which provides for asynchronous drive of the two diaphragms, thus allowing a multiple diaphragm pump to be used as the metering pump.

Claims (6)

Verfahren zum Betrieb einer Mehrfachmembranpumpe, welche ein Pumpengehäuse mit mehreren in parallelen Leitungsabschnitten aufgenommenen Membrankammern aufweist, die jeweils zwischen zwei in Strömungsrichtung gleichsinnig schließenden Kugelventilen eingeschlossen und von einer Membran flüssigkeitsdicht in jeweils eine Flüssigkeitskammer und eine Luftkammer unterteilt sind und wobei dem Pumpengehäuse ferner in einer zwischen den Luftkammern angeordneten Antriebskammer ein Antrieb zugeordnet ist, wobei der Antrieb mechanisch mit den Membranen verbundene Antriebsmittel zum voneinander unabhängigen Bewegen der Membran zwischen jeweils zwei Bewegungsendpunkten aufweist und die Antriebsmittel der beiden Membranen von dem einen Antrieb asynchron bewegt werden,
dadurch gekennzeichnet, dass die Antriebsmittel zur Erreichung eines einstellbaren Förderverhältnisses der mehreren Membranen mit dem Antrieb über einstellbare Getriebe bewegt werden.A method for operating a multi-diaphragm pump having a pump housing with a plurality of recorded in parallel line sections membrane chambers, each enclosed between two in the same direction in the direction of closing ball valves and liquid-tight in a respective liquid chamber and an air chamber are divided by a membrane and wherein the pump housing further in a between a drive is assigned to the drive chamber arranged in the air chambers, the drive having drive means mechanically connected to the diaphragms for moving the diaphragm independently between each two movement end points and the drive means of the two diaphragms being moved asynchronously by the one drive;
characterized in that the drive means are moved to achieve an adjustable delivery ratio of the plurality of membranes with the drive via adjustable gear. Verfahren zum Betrieb einer Mehrfachmembranpumpe gemäß Anspruch 1,
dadurch gekennzeichnet, dass es sich bei der Mehrfachmembranpumpe um eine Doppelmembranpumpe mit zwei Membranen handelt.A method of operating a multiple diaphragm pump according to claim 1,
characterized in that the multiple diaphragm pump is a double diaphragm pump with two diaphragms. Verfahren zum Betrieb einer Mehrfachmembranpumpe gemäß Anspruch 1,
dadurch gekennzeichnet, dass es sich bei der Mehrfachmembranpumpe um eine Membranpumpe mit drei oder mehr Membranen handelt.A method of operating a multiple diaphragm pump according to claim 1,
characterized in that the multiple diaphragm pump is a diaphragm pump having three or more diaphragms. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebsmittel der beiden Membranen in unterschiedlicher Hubfrequenz bewegt werden.Method according to one of the preceding claims, characterized in that the drive means of the two membranes are moved in different stroke frequency. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebsmittel der beiden Membranen von unterschiedlichen Antrieben bewegt werden.Method according to one of the preceding claims, characterized in that the drive means of the two diaphragms are moved by different drives. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es sich bei den Antrieben um elektrische Motoren, hydraulische oder pneumatische Zylinder oder Druckluftventile handelt.Method according to one of the preceding claims, characterized in that the drives are electric motors, hydraulic or pneumatic cylinders or pneumatic valves.
EP19172525.8A 2018-05-07 2019-05-03 Method for operating a multiple membrane pump Active EP3567248B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19172525T PL3567248T3 (en) 2018-05-07 2019-05-03 Method for operating a multiple membrane pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018110918.0A DE102018110918A1 (en) 2018-05-07 2018-05-07 Method for operating a double diaphragm pump

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EP3567248A1 true EP3567248A1 (en) 2019-11-13
EP3567248B1 EP3567248B1 (en) 2020-06-17

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US (1) US20190338765A1 (en)
EP (1) EP3567248B1 (en)
CA (1) CA3042230C (en)
DE (1) DE102018110918A1 (en)
ES (1) ES2805464T3 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR54797E (en) 1946-07-10 1950-08-01 Reciprocating motor mechanism and its application to positive displacement pumps
DE2311016A1 (en) * 1972-03-06 1973-09-20 Waters Associates Inc PUMPING DEVICE
GB1595254A (en) * 1978-01-25 1981-08-12 Berelson R Pumping unit for dishwashing machines
US4718832A (en) 1985-03-11 1988-01-12 Man Design Co., Ltd. Electromagnetic reciprocating pump
DE4132930A1 (en) * 1991-10-04 1993-04-08 Teves Gmbh Alfred Variable output compact hydraulic pump for brake circuit - has array of spring mounted pistons with non-return valves and operated by solenoids in programmed pattern
US20120063924A1 (en) 2010-09-09 2012-03-15 Simmons Tom M Reciprocating fluid pumps including magnets, devices including magnets for use with reciprocating fluid pumps, and related methods
DE102016121333A1 (en) 2016-11-08 2018-05-09 Lutz Holding GmbH DOUBLE-MEMBRANE PUMP, METHOD FOR OPERATING SUCH A DOUBLE-MEMBRANE PUMP, AND A MEMBRANE PUMP

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PL3567248T3 (en) 2020-11-02
ES2805464T3 (en) 2021-02-12
US20190338765A1 (en) 2019-11-07
EP3567248B1 (en) 2020-06-17
CA3042230A1 (en) 2019-11-07
DE102018110918A1 (en) 2019-11-07
CA3042230C (en) 2021-06-15

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