EP1855006A2 - Rotary piston pump - Google Patents

Rotary piston pump Download PDF

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Publication number
EP1855006A2
EP1855006A2 EP07009193A EP07009193A EP1855006A2 EP 1855006 A2 EP1855006 A2 EP 1855006A2 EP 07009193 A EP07009193 A EP 07009193A EP 07009193 A EP07009193 A EP 07009193A EP 1855006 A2 EP1855006 A2 EP 1855006A2
Authority
EP
European Patent Office
Prior art keywords
piston
rotary
tip
nut
rotary piston
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
EP07009193A
Other languages
German (de)
French (fr)
Other versions
EP1855006A3 (en
EP1855006B1 (en
Inventor
Hugo Vogelsang
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.)
Hugo Vogelsang Maschinenbau GmbH
Original Assignee
Hugo Vogelsang Maschinenbau GmbH
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Publication date
Application filed by Hugo Vogelsang Maschinenbau GmbH filed Critical Hugo Vogelsang Maschinenbau GmbH
Publication of EP1855006A2 publication Critical patent/EP1855006A2/en
Publication of EP1855006A3 publication Critical patent/EP1855006A3/en
Application granted granted Critical
Publication of EP1855006B1 publication Critical patent/EP1855006B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/85—Methods for improvement by repair or exchange of parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a rotary piston pump with one or more rotating pistons for conveying substantially liquid media, wherein at least partially on the piston a surface layer is fixed as a piston tip of a polymer, in particular an elastomer
  • the invention relates to rotary lobe pumps with straight, but also equally well wound, piston parts that are exposed due to the medium to be conveyed a more or less severe wear. But if the piston tips wear, the efficiency of the pump decreases and this is more or less quickly unusable.
  • Adjustable piston tips have been proposed, which can be adjusted depending on the wear on a sliding wedge ( DE 43 13 457 C1 ).
  • a further embodiment is characterized in that in the piston tip at least one nut is included, each cooperating with a fastening screw and that the head of the fastening screw arranged in a rotary shaft towards the open radial recess of the main body of the rotary piston and with its threaded end with the nut in threaded engagement is.
  • the advantage of the present invention is particularly seen in the fact that relatively simple bolt-nut connections are used to attach the Kolbespitze on the main body of the rotary piston.
  • the mother of this compound is housed inside the polymer or elastomer of the piston tip, ie the elastomer material is after a beneficial Embodiment vulcanized around the mother.
  • an opening is left radially inwardly, which can accommodate a screw, which in turn can be inserted from the inside again via the bore of the rotary piston in a recess.
  • a relatively simple but effective connection of the piston tip with the main body of the rotary piston can be created, wherein the fastening parts for the piston tip can not be reached by the aggressive medium to be pumped in the product space.
  • plunger tips 10 are shown attached to rotary pistons.
  • Each rotary piston has an internal cavity 11, which serves to receive the drive shaft.
  • recesses 12 are designed in diameter so that the head of a hexagon socket screw 13 there Find recording and the threaded end of the screw 14 can protrude radially outward.
  • the piston tips 10 are made of an elastomer, with one or more nuts 15 inside.
  • embedded steel inserts 16 are in the piston tips.
  • a disc 17 is provided between a piston tip 10 and the main body of a rotary piston.
  • a mat 17 is shown instead of a disc. It can be seen that 10 wear can be compensated by the use of parts 17 and after re-assembly of the piston tips, in such a way that the outer radial extent of the piston tips 10 is again on the top circle of the rotary piston and thus for proper operation of the Rotary pistons provide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The pump has rotary pistons for delivering fluid medium, and a surface layer fastened as a piston head (10) in the pistons, where the piston head is made of polymer e.g. elastomer. The piston head is mounted in a base of the pistons in a removable manner. A screw nut (15) is locked in the piston head and cooperates with a mounting bolt (14). A head (13) of the mounting bolt is arranged in a radial recess (12) of the base of the pistons and contacts with the screw nut, where the radial recess is open at a rotary piston shaft.

Description

Die Erfindung bezieht sich auf eine Drehkolbenpumpe mit einem oder mehreren rotierenden Kolben zur Förderung von im Wesentlichen flüssigen Medien, wobei zumindest bereichsweise am Kolben eine Oberflächenlage als Kolbenspitze aus einem Polymer, insbesondere einem Elastomer, befestigt istThe invention relates to a rotary piston pump with one or more rotating pistons for conveying substantially liquid media, wherein at least partially on the piston a surface layer is fixed as a piston tip of a polymer, in particular an elastomer

Die Erfindung bezieht sich auf Drehkolbenpumpen mit geraden, aber auch ebenso gut gewundenen, Kolbenteilen, die bedingt durch das zu fördernde Medium einem mehr oder weniger starken Verschleiß ausgesetzt werden. Wenn aber die Kolbenspitzen verschleißen, sinkt der Wirkungsgrad der Pumpe und diese wird mehr oder weniger schnell unbrauchbar.The invention relates to rotary lobe pumps with straight, but also equally well wound, piston parts that are exposed due to the medium to be conveyed a more or less severe wear. But if the piston tips wear, the efficiency of the pump decreases and this is more or less quickly unusable.

Es sind nachstellbare Kolbenspitzen vorgeschlagen worden, die je nach Verschleiß über einen verschiebbaren Keil nachgestellt werden können ( DE 43 13 457 C1 ).Adjustable piston tips have been proposed, which can be adjusted depending on the wear on a sliding wedge ( DE 43 13 457 C1 ).

Den bekannten Lösungen ist gemeinsam, dass der Aufbau des Drehkolbens relativ kompliziert und der Auswechsel- oder Nachstellvorgang sehr zeitaufwändig istThe known solutions have in common that the structure of the rotary piston is relatively complicated and the replacement or readjustment process is very time consuming

Durch die vorliegende Erfindung sollen die Nachteile bekannter Lösungen vermieden werden und insbesondere soll eine Drehkolbenpumpe der eingangs genannten Art so ausgestaltet werden, dass diese mit geringem Aufwand herstellbar und die Montage der Kolbenspitzen einfach ausführbar ist.By the present invention, the disadvantages of known solutions are to be avoided and in particular a rotary pump of the above mentioned type be designed so that they can be produced with little effort and the assembly of the piston tips easily executable.

Erreicht wird dies bei einer Drehkolbenpumpe der eingangs genannten Art dadurch, dass die Kolbenspitze abnehmbar am Grundkörper des Drehkolbens angebracht ist,This is achieved in a rotary piston pump of the type mentioned in that the piston tip is removably attached to the main body of the rotary piston,

Eine weitere Ausführungsform ist dadurch geprägt, dass in der Kolbenspitze mindestens eine Mutter eingeschlossen ist, die jeweils mit einer Befestigungsschraube zusammenwirkt und dass der Kopf der Befestigungsschraube in einer zur Drehkolbenwelle hin offenen Radialausnehmung des Grundkörpers des Drehkolbens angeordnet und mit seinem Gewindeende mit der Mutter im Gewindeeingriff ist.A further embodiment is characterized in that in the piston tip at least one nut is included, each cooperating with a fastening screw and that the head of the fastening screw arranged in a rotary shaft towards the open radial recess of the main body of the rotary piston and with its threaded end with the nut in threaded engagement is.

Weitere Ausgestaltungen sind:

  • dass sich zwischen der Oberfläche des Grundkörpers des Drehkolbens und der Kolbenspitze eine mit ihrer Dicke den Verschleiß der Kolbenspitze ausgleichenden Unterlegscheibe oder-matte befindet,
  • dass die Befestigungsschraube, die Mutter und die Unterlegscheibe oder -matte zum Produktraum hin abgedichtet untergebracht sind,
  • dass die Mutter und die Unterlegscheibe oder -matte in die Kolbenspitze einvulkanisiert sind.
Further embodiments are:
  • that between the surface of the main body of the rotary piston and the piston tip is a with its thickness the wear of the piston tip balancing washer or mat,
  • that the fastening screw, the nut and the washer or mat are accommodated sealed to the product space,
  • that the nut and the washer or mat are vulcanised into the piston tip.

Der Vorteil der vorliegenden Erfindung ist insbesondere darin zu sehen, dass relativ einfache Bolzen-Mutter-Verbindungen eingesetzt werden, um die Kolbespitze am Grundkörper des Drehkolbens zu befestigen. Die Mutter dieser Verbindung ist im Inneren des Polymers bzw. Elastomers der Kolbenspitze untergebracht, d.h. der Elastomerwerkstoff wird nach einer vorteilhaften Ausführungsform um die Mutter herum vulkanisiert. Dabei wird eine Öffnung radial nach innen gelassen, die eine Schraube aufnehmen kann, die nun ihrerseits wieder von innen über die Bohrung des Drehkolbens in eine Ausnehmung hineingesteckt werden kann. Auf diese Art und Weise kann eine relativ einfache aber wirkungsvolle Verbindung der Kolbenspitze mit dem Grundkörper des Drehkolbens geschaffen werden, wobei die Befestigungsteile für die Kolbenspitze nicht vom aggressiven zu pumpenden Medium im Produktraum erreicht werden können.The advantage of the present invention is particularly seen in the fact that relatively simple bolt-nut connections are used to attach the Kolbespitze on the main body of the rotary piston. The mother of this compound is housed inside the polymer or elastomer of the piston tip, ie the elastomer material is after a beneficial Embodiment vulcanized around the mother. In this case, an opening is left radially inwardly, which can accommodate a screw, which in turn can be inserted from the inside again via the bore of the rotary piston in a recess. In this way, a relatively simple but effective connection of the piston tip with the main body of the rotary piston can be created, wherein the fastening parts for the piston tip can not be reached by the aggressive medium to be pumped in the product space.

Je nach Größe des Verschleißes kann als Ausgleich der Verringerung der Radialerstreckung der Kolbenspitzen eine Scheibe oder eine Matte zwischen dem Grundkörper und der Kolbenspitze eingebracht und die Kolben-Mutter-Verbindung danach wieder angezogen werden.Depending on the size of the wear can be introduced as compensation for the reduction of the radial extent of the piston tips a disc or a mat between the body and the piston tip and the piston-nut connection are then tightened again.

Die Erfindung wird nachstehen anhand der Zeichnung beispielsweise erläutert.

Fig. 1
zeigt eine Stirnansicht auf einen Drehkolben gemäß der Erfindung.
Fig. 2
zeigt eine abgewandelte Ausführungsform im Hinblick auf die Figur 1.
Fig. 3
zeigt eine Seitenansicht des Drehkolbens gemäß den Figuren 1 und 2.
Fig. 4
zeigt eine Stirnansicht eines Drehkolbens mit sich gradlinig erstreckenden Kolbenspitzen.
The invention will be explained with reference to the drawing, for example.
Fig. 1
shows an end view of a rotary piston according to the invention.
Fig. 2
shows a modified embodiment with regard to the figure 1.
Fig. 3
shows a side view of the rotary piston according to Figures 1 and 2.
Fig. 4
shows an end view of a rotary piston with straight extending piston tips.

In den Figuren sind Kolbenspitzen 10 gezeigt, die an Drehkolben befestigt sind. Jeder Drehkolben hat einen Innenhohlraum 11, der der Aufnahme der Antriebswelle dient.In the figures, plunger tips 10 are shown attached to rotary pistons. Each rotary piston has an internal cavity 11, which serves to receive the drive shaft.

Von radial innen her sind an mehreren Stellen des Drehkolbens sich radial erstreckende Ausnehmung 12 vorgesehen. Diese Ausnehmungen 12 sind im Durchmesser so gestaltet, dass der Kopf einer Innensechskantschraube 13 dort Aufnahme finden und das Gewindeende der Schraube 14 radial nach außen vorstehen kann.From radially inward radially extending recess 12 are provided at several points of the rotary piston. These recesses 12 are designed in diameter so that the head of a hexagon socket screw 13 there Find recording and the threaded end of the screw 14 can protrude radially outward.

Die Kolbenspitzen 10 sind aus einem Elastomer hergestellt, wobei sich im Inneren eine Mutter oder mehrere Muttern 15 befinden. Zur Kraftumleitung befinden sich in den Kolbenspitzen 10 eingebettete Stahleinlagen 16.The piston tips 10 are made of an elastomer, with one or more nuts 15 inside. For power diversion 10 embedded steel inserts 16 are in the piston tips.

In Figur 1 ist zwischen einer Kolbenspitze 10 und dem Grundkörper eines Drehkolbens eine Scheibe 17 vorgesehen. In Figur 2 ist statt einer Scheibe eine Matte 17 gezeigt. Es ist ersichtlich, dass durch den Einsatz der Teile 17 und nach erneuter Montage der Kolbenspitzen 10 ein Verschleiß ausgeglichen werden kann, und zwar so, dass die äußere Radialerstreckung der Kolbenspitzen 10 sich wieder auf dem Kopfkreis des Drehkolbens befindet und damit für eine einwandfreie Funktion des Drehkolbens sorgen.In Figure 1, a disc 17 is provided between a piston tip 10 and the main body of a rotary piston. In Figure 2, a mat 17 is shown instead of a disc. It can be seen that 10 wear can be compensated by the use of parts 17 and after re-assembly of the piston tips, in such a way that the outer radial extent of the piston tips 10 is again on the top circle of the rotary piston and thus for proper operation of the Rotary pistons provide.

Die Herstellung und insbesondere die Vulkanisation der Kolbenspitzen 10 mit der sich darin befindlichen Mutter und der radialen Ausnehmung stellt kein Problem dar. Der Nachstellvorgang selbst ist ebenfalls relativ einfach zu bewerkstelligen und unterscheidet sich nicht von dem erstmaligen Montagevorgang.The manufacture and in particular the vulcanization of the piston tips 10 with the nut located therein and the radial recess is not a problem. The adjustment itself is also relatively easy to do and does not differ from the first-time assembly process.

Claims (5)

Drehkolbenpumpe mit einem oder mehreren rotierenden Kolben zur Förderung von im Wesentlichen flüssigen Medien, wobei zumindest bereichsweise am Kolben eine Oberflächenlage als Kolbenspitze (10) aus einem Polymer, insbesondere einem Elastomer, befestigt ist, dadurch gekennzeichnet, dass die Kolbenspitze (10) abnehmbar am Grundkörper des Drehkolbens angebracht ist.Rotary pump with one or more rotating piston for conveying substantially liquid media, wherein at least partially on the piston, a surface layer as a piston tip (10) made of a polymer, in particular an elastomer, is attached, characterized in that the piston tip (10) removably on the base body the rotary piston is mounted. Drehkolbenpumpe mit einem oder mehreren rotierenden Kolben zur Förderung von im Wesentlichen flüssigen Medien, wobei zumindest bereichsweise am Kolben eine Oberflächenlage als Kolbenspitze (10) aus einem Polymer, insbesondere einem Elastomer, befestigt ist, dadurch gekennzeichnet, dass in der Kolbenspitze(10) mindestens eine Mutter (15) eingeschlossen ist, die jeweils mit einer Befestigungsschraube (14) zusammenwirkt und dass der Kopf (13) der Befestigungsschraube in einer zur Drehkolbenwelle hin offenen Radialausnehmung (12) des Grundkörpers des Drehkolbens angeordnet und mit seinem Gewindeende mit der Mutter (15) im Gewindeeingriff ist.Rotary piston pump with one or more rotating piston for conveying substantially liquid media, wherein at least partially on the piston a surface layer as a piston tip (10) made of a polymer, in particular an elastomer, is fixed, characterized in that in the piston tip (10) at least one Nut (15) is included, each cooperating with a fastening screw (14) and that the head (13) of the fastening screw in a rotary shaft towards the open radial recess (12) of the main body of the rotary piston and arranged with its threaded end with the nut (15) in threaded engagement. Drehkolbenpumpe nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass sich zwischen der Oberfläche des Grundkörpers des Drehkolbens und der Kolbenspitze (10) eine mit ihrer Dicke den Verschleiß der Kolbenspitze (10) ausgleichenden Unterlegscheibe oder -matte (17) befindet.Rotary piston pump according to one of claims 1 or 2, characterized in that between the surface of the main body of the rotary piston and the piston tip (10) with its thickness the wear of the piston tip (10) compensating washer or mat (17). Drehkolbenpumpe nach Anspruch 3. dadurch gekennzeichnet, dass die Befestigungsschraube (14), die Mutter (15) und die Unterlegscheibe oder - matte (17) zum Produktraum hin abgedichtet untergebracht sind.Rotary pump according to claim 3, characterized in that the fastening screw (14), the nut (15) and the washer or - mat (17) are accommodated sealed to the product space. Drehkolbenpumpe nach Anspruch 4, dadurch gekennzeichnet, dass die Mutter (15) und die Unterlegscheibe oder -matte (17) in die Kolbenspitze (14) einvulkanisiert sind.Rotary pump according to claim 4, characterized in that the nut (15) and the washer or mat (17) are vulcanized into the piston tip (14).
EP07009193.9A 2006-05-11 2007-05-08 Rotary piston pump Active EP1855006B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200620007501 DE202006007501U1 (en) 2006-05-11 2006-05-11 Rotary pump

Publications (3)

Publication Number Publication Date
EP1855006A2 true EP1855006A2 (en) 2007-11-14
EP1855006A3 EP1855006A3 (en) 2012-10-24
EP1855006B1 EP1855006B1 (en) 2019-05-08

Family

ID=38325649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07009193.9A Active EP1855006B1 (en) 2006-05-11 2007-05-08 Rotary piston pump

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EP (1) EP1855006B1 (en)
DE (1) DE202006007501U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019948A1 (en) 2011-08-03 2013-02-07 Ramos Rolando Nico M Piston with replaceable and/or adjustable surfaces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100677B4 (en) 2013-01-23 2017-03-02 Roediger Vacuum Gmbh Rotary pump
DE202016100419U1 (en) * 2016-01-28 2017-05-02 Hugo Vogelsang Maschinenbau Gmbh Piston for a rotary lobe pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056661A1 (en) * 1970-11-18 1972-05-31 Eisenwerke Kaiserslautern Gmbh, 6750 Kaiserslautern Rotary lobe pump for viscous media
DE3707722A1 (en) * 1987-03-11 1988-09-29 Alois Boerger Rotor pump, especially for pumping liquids containing solids
DE4313457C1 (en) * 1993-04-24 1994-05-11 Alois Boerger Pump with intermeshing lobed rotors - has adjusting mechanism in each lobe thrusting elastomer cover at tip outwards and has adjusting body sliding in groove inside lobe
EP0599333A1 (en) * 1992-11-27 1994-06-01 Alois Börger Rotary Pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802264C1 (en) * 1998-01-22 1998-11-26 Boerger Gmbh Rotary pump for solid suspensions in fluids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056661A1 (en) * 1970-11-18 1972-05-31 Eisenwerke Kaiserslautern Gmbh, 6750 Kaiserslautern Rotary lobe pump for viscous media
DE3707722A1 (en) * 1987-03-11 1988-09-29 Alois Boerger Rotor pump, especially for pumping liquids containing solids
EP0599333A1 (en) * 1992-11-27 1994-06-01 Alois Börger Rotary Pump
DE4313457C1 (en) * 1993-04-24 1994-05-11 Alois Boerger Pump with intermeshing lobed rotors - has adjusting mechanism in each lobe thrusting elastomer cover at tip outwards and has adjusting body sliding in groove inside lobe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019948A1 (en) 2011-08-03 2013-02-07 Ramos Rolando Nico M Piston with replaceable and/or adjustable surfaces
CN103842654A (en) * 2011-08-03 2014-06-04 罗贝波公司 Piston with replaceable and/or adjustable surfaces
EP2739854A4 (en) * 2011-08-03 2015-07-22 Lobepro Inc Piston with replaceable and/or adjustable surfaces
CN103842654B (en) * 2011-08-03 2017-02-22 罗贝波公司 Piston with replaceable and/or adjustable surfaces

Also Published As

Publication number Publication date
EP1855006A3 (en) 2012-10-24
EP1855006B1 (en) 2019-05-08
DE202006007501U1 (en) 2007-09-13

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