EP0590472A1 - Magnetic stirrer - Google Patents
Magnetic stirrer Download PDFInfo
- Publication number
- EP0590472A1 EP0590472A1 EP93115170A EP93115170A EP0590472A1 EP 0590472 A1 EP0590472 A1 EP 0590472A1 EP 93115170 A EP93115170 A EP 93115170A EP 93115170 A EP93115170 A EP 93115170A EP 0590472 A1 EP0590472 A1 EP 0590472A1
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- EP
- European Patent Office
- Prior art keywords
- agitator
- tube
- shaft
- drive
- agitator according
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
Definitions
- the invention relates to an agitator with an agitator shaft, a drive, an agitator and a contactless coupling for transmitting a drive torque from the drive via the agitator shaft to the agitator.
- Such agitators are known, for example, as permanent magnetic rotary agitators.
- the torque transmission between the drive motor and agitator shaft is based on the principle of the magnetic radial coupling.
- the outer coupling part is connected to an electric motor with a continuously variable transmission and sets the inner coupling part into a rotational movement synchronous with the transmission via an air gap.
- hydraulic, pneumatic or other types of gears can be used.
- a can made of paramagnetic material is arranged, which is connected, for example, via a cooling column to an autoclave interior, the inner drive system being pressure-tight against the autoclave interior.
- the cooling column keeps the high autoclave temperatures away from the magnet system and the bearings.
- the can with the subsequent cooling column represents a common volume with the interior of the autoclave. Since the stirrer shaft is arranged and supported within the cooling column or the can, a seal must be provided within the can and the subsequent cooling column, which separates the autoclave space from the volume of the can or cooling tube, so that the agitator shaft bearing is protected from the autoclave atmosphere.
- the rotating agitator shaft projects freely into the interior of the autoclave via this seal.
- the bearing of this freely protruding shaft end causes problems because the shaft is easily deflected under the reaction forces and tends to vibrate.
- the seals between the rotating agitator shaft and the stationary gap or cooling tube must not fail. Otherwise the entire batch would be lost.
- seals and bearings represent a permanent weak point in the known magnetic agitators and have a particularly disadvantageous effect in the aseptic and sterile application area.
- the upper part of the can or cooling tube has a constant air cushion without ventilation, which cannot be sterilized in the autoclave, or can only be sterilized with uncertainty.
- the bearing cannot be lubricated.
- the agitator shafts cannot be built to any length.
- the bearings and seals to be provided within the canned tube form uncontrollable areas in which microorganisms can settle. The problems cannot be solved satisfactorily even with complex seals with barrier media.
- the object of the invention is to avoid the disadvantages of the known agitators.
- the object is achieved in that the non-contact coupling is provided between the agitator shaft and the agitating tool, the agitator shaft being arranged within a tube.
- the tube serves as a guide tube for the agitator shaft. This makes it possible to run any length, because the shaft bearing can be brought up to the coupling. Normal materials can easily be used within the guide tube.
- the pipe has no dead zone. It can be easily cleaned and sterilized. In addition, vulnerable additional mechanical seals are avoided.
- the product in the autoclave is hermetically sealed against the environment.
- the stirring tool is rotatably supported on the tube, in particular by means of a slide bearing, and the bearing is preferably lubricated by the medium to be stirred.
- This storage on the fixed pipe prevents vibrations.
- the life expectancy of the bearings is increased.
- radial support is sufficient, since in minor cases the axial hold of the stirring tool is achieved by the magnetic forces.
- the agitator shaft is mounted at least twice within the tube.
- the deflections of the agitator shafts known from the prior art are advantageously avoided by this measure.
- Critical shaft speeds are mastered.
- the stirring tool can be provided at the optimal location for stirring and mixing.
- the measure that the stirring tool is designed as an impeller with an inner surface partially enveloping the tube and an outer surface with at least one channel connecting the two surfaces serves to improve the self-cleaning property of the stirring tool.
- the inner area around the bearing is constantly rinsed with the product to be mixed.
- the cleaning liquid also reaches the hard-to-reach places in the area of the bearings.
- the product or the cleaning liquid can also run out of the stirring tool after the container has been emptied.
- the hermetic separation of the container interior is achieved in that the tube has a seal or sealing surface at the drive end.
- the attachment of the stirring tool to the container is made easier if the tube has a mounting flange at the drive end.
- a second clutch is arranged between the drive and agitator shaft serves to facilitate disassembly of the agitator.
- the tube has an interior that is heatable or coolable.
- the tube itself is coolable or heatable, preferably double-walled for this purpose.
- the characteristics of the agitator are particularly advantageous when the agitator is used in containers for microbiological processes.
- the design of the agitator can be further simplified if the drive is arranged in the tube, preferably without a shaft.
- 1 denotes a bearing and protective tube, within which a drive shaft 2 is rotatably fixed by means of bearings 7 and 8.
- the lower end of the bearing and protective tube 1 is designed as a pot-like can, which forms the end of the bearing and guide tube.
- the agitator shaft 2 projects into the can 12 and carries at its lower end a magnetic disk 5 equipped with a plurality of permanent magnets in a rotationally fixed manner.
- the can 12 is partially enveloped by the impeller head 13. Inside the impeller head 13 is the magnetic disk 5 a number of oppositely polarized permanent magnets, not shown, is arranged opposite, so that a torque can be transmitted from the drive shaft 2 to the impeller head 13 without contact by the magnetic forces between the magnetic disk 5 and the permanent magnets.
- the impeller head 13 carries vanes 4 attached to webs as stirring tools.
- the impeller head is supported by the product-lubricated slide bearing 6, which is seated on a shaft stub 14 formed downwards on the can 12.
- the inner depression with the surface 15 of the impeller 13 is connected via channel 3 to the outer surface 16 of the impeller 13.
- a pump effect is generated from the channel 3, which is directed radially outwards in some way, and allows the liquid present in the pot-shaped cavity of the impeller 13 to flow outwards.
- the inner surface of the impeller is constantly rinsed with product liquid, which has a self-cleaning effect.
- the upper end of the guide and bearing tube ends in a guide surface 17 with a subsequent mounting flange 18.
- a sealing groove with a seal 11 is formed, which closes the gap between the guide surface 17 and the mounting socket 19 in the container wall 20.
- the mounting piece 19 and wall 20 is shown in broken lines.
- the agitator shaft 2 is connected to drive 10 via coupling 9 and gear 21.
- the drive 10 and the gear 21 are coaxially screwed directly onto the mounting flange 18.
- fixed windings can also be arranged as a drive within the guide tube 1, which, with appropriate control, for example by means of known step controls, generate a rotating field, which then supply the required drive torque for the stirring tool without contact.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
Die Erfindung betrifft Rührwerk mit einer Rührwerkswelle, einem Antrieb, einem Rührwerkzeug und einer berührungslos wirkenden Kupplung zur Übertragung eines Antriebsmoments vom Antrieb über die Rührwerkswelle auf das Rührwerkzeug.The invention relates to an agitator with an agitator shaft, a drive, an agitator and a contactless coupling for transmitting a drive torque from the drive via the agitator shaft to the agitator.
Derartige Rührwerke sind beispielsweise als permanentmagnetische Drehrührwerke bekannt. Die Drehmomentübertragung zwischen Antriebsmotor und Rührwerkswelle erfolgt nach dem Prinzip der magnetischen Radialkupplung. Der äußere Kupplungsteil ist mit einem Elektromotor mit stufenlos regelbarem Getriebe verbunden und versetzt den inneren Kupplungsteil über einen Luftspalt in eine mit dem Getriebe synchrone Rotationsbewegung. Alternativ sind hydraulische, pneumatische oder andere Getriebearten einsetzbar. In dem Luftspalt zwischen inneren und äußeren Kupplungsteil ist ein Spaltrohr aus paramagnetischem Werkstoff angeordnet, das beispielsweise über eine Kühlsäule mit einen Autoklaveninnenraum verbunden ist, wobei das innere Antriebssystem druckdicht gegen den Autoklaveninnenraum abschließt. Die Kühlsäule hält dabei die hohen Autoklaventemperaturen von dem Magnetsystem und den Lagern fern.Such agitators are known, for example, as permanent magnetic rotary agitators. The torque transmission between the drive motor and agitator shaft is based on the principle of the magnetic radial coupling. The outer coupling part is connected to an electric motor with a continuously variable transmission and sets the inner coupling part into a rotational movement synchronous with the transmission via an air gap. Alternatively, hydraulic, pneumatic or other types of gears can be used. In the air gap between the inner and outer coupling part, a can made of paramagnetic material is arranged, which is connected, for example, via a cooling column to an autoclave interior, the inner drive system being pressure-tight against the autoclave interior. The cooling column keeps the high autoclave temperatures away from the magnet system and the bearings.
Das Spaltrohr mit der anschließenden Kühlsäule stellt mit dem Autoklaveninnenraum ein gemeinsames Volumen dar. Da innerhalb der Kühlsäule beziehungsweise dem Spaltrohr die Rührwelle angeordnet und gelagert ist, muß innerhalb des Spaltrohres und der anschließenden Kühlsäule eine Dichtung vorgesehen werden, die den Autoklavenraum von dem Volumen des Spaltrohres beziehungsweise Kühlrohres trennt, damit die Rührwerkwellenlager vor der Autoklavenatmophäre geschützt ist. Über diese Dichtung ragt die drehende Rührwerkswelle frei in den Autoklaveninnenraum hinein. Die Lagerung dieses frei herausragenden Wellenendes bereitet Probleme, da die Welle leicht unter den Reaktionskräften ausgelenkt wird und zu Schwingungen neigt.The can with the subsequent cooling column represents a common volume with the interior of the autoclave. Since the stirrer shaft is arranged and supported within the cooling column or the can, a seal must be provided within the can and the subsequent cooling column, which separates the autoclave space from the volume of the can or cooling tube, so that the agitator shaft bearing is protected from the autoclave atmosphere. The rotating agitator shaft projects freely into the interior of the autoclave via this seal. The bearing of this freely protruding shaft end causes problems because the shaft is easily deflected under the reaction forces and tends to vibrate.
Insbesondere bei mikrobiologischen Prozessen dürfen die Dichtungen zwischen der drehenden Rührwerkswelle und dem ruhenden Spalt- beziehungsweise Kühlrohr nicht versagen. Die Folge wäre sonst der Verlust der gesamten Charge.Especially in microbiological processes, the seals between the rotating agitator shaft and the stationary gap or cooling tube must not fail. Otherwise the entire batch would be lost.
Diese Dichtungen und Lager stellen bei den bekannten Magnetrührwerken eine immerwährende Schwachstelle dar und wirken sich besonders nachteilig im aseptischen und sterilen Anwendungsbereich aus. Der obere Teil des Spaltrohres beziehungsweise des Kühlrohres weist ohne Belüftung ein ständiges Luftpolster auf, das sich nicht oder nur unsicher im Autoklaven sterilisieren läßt. Die Lagerung laßt sich darüber hinaus nicht schmieren. Ohne geeignete Lager können aber die Rührwerkswellen nicht beliebig lang gebaut werden. Die innerhalb des Spaltrohres vorzusehenden Lager und Dichtungen bilden unkontrollierbare Bereiche, in denen sich Mikroorganismen festsetzen können. Auch durch aufwendige Dichtungen mit Sperrmedien lassen sich die Probleme nicht befriedigend lösen.These seals and bearings represent a permanent weak point in the known magnetic agitators and have a particularly disadvantageous effect in the aseptic and sterile application area. The upper part of the can or cooling tube has a constant air cushion without ventilation, which cannot be sterilized in the autoclave, or can only be sterilized with uncertainty. In addition, the bearing cannot be lubricated. Without suitable bearings, however, the agitator shafts cannot be built to any length. The bearings and seals to be provided within the canned tube form uncontrollable areas in which microorganisms can settle. The problems cannot be solved satisfactorily even with complex seals with barrier media.
Aufgabe der Erfindung ist es, die Nachteile der bekannten Rührwerke zu vermeiden.The object of the invention is to avoid the disadvantages of the known agitators.
Die Aufgabe wird dadurch gelöst, daß die berührungslos wirkende Kupplung zwischen Rührwerkswelle und Rührwerkzeug vorgesehen ist, wobei die Rührwerkswelle innerhalb eines Rohres angeordnet ist. Das Rohr dient als Führungsrohr für die Rührwerkswelle. Dadurch ist es möglich, jede Länge auszuführen, weil die Wellenlagerung bis an die Kupplung herangeführt werden kann. Innerhalb des Führungsrohrs kann man problemlos normale Werkstoffe einsetzen. Das Rohr weist keine tote Zone auf. Es kann problemlos gereinigt und sterilisiert werden. Außerdem werden anfällige zusätzliche Gleitringdichtungen vermieden. Das Produkt im Autoklaven ist hermetisch gegen die Umwelt abgedichtet.The object is achieved in that the non-contact coupling is provided between the agitator shaft and the agitating tool, the agitator shaft being arranged within a tube. The tube serves as a guide tube for the agitator shaft. This makes it possible to run any length, because the shaft bearing can be brought up to the coupling. Normal materials can easily be used within the guide tube. The pipe has no dead zone. It can be easily cleaned and sterilized. In addition, vulnerable additional mechanical seals are avoided. The product in the autoclave is hermetically sealed against the environment.
In Ausgestaltung der Erfindung ist vorgesehen, daß das Rührwerkzeug auf dem Rohr, insbesondere mittels eines Gleitlagers, drehbeweglich gehaltert ist und wobei das Lager vorzugsweise durch das zu rührende Medium geschmiert wird. Durch diese Lagerung auf dem feststehenden Rohr werden Schwingungen vermieden. Die Lebenserwartung der Lager ist erhöht. In besonderen Fällen reicht hierbei eine radiale Lagerung aus, da in untergeordneten Fällen der axiale Halt des Rührwerkzeugs durch die magnetischen Kräfte erfolgt.In an embodiment of the invention it is provided that the stirring tool is rotatably supported on the tube, in particular by means of a slide bearing, and the bearing is preferably lubricated by the medium to be stirred. This storage on the fixed pipe prevents vibrations. The life expectancy of the bearings is increased. In special cases, radial support is sufficient, since in minor cases the axial hold of the stirring tool is achieved by the magnetic forces.
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die Rührwerkswelle innerhalb des Rohres mindestens zweifach gelagert ist. Die aus dem Stand der Technik bekannten Auslenkungen der Rührwerkswellen werden durch diese Maßnahme vorteilhaft vermieden. Kritische Drehzahlen der Welle werden beherrscht. Auch unter ungünstigen konstruktiven Randbedingungen kann das Rührwerkzeug an der zum Rühren und Mischen optimalen Stelle konstruktiv vorgesehen werden.In a further embodiment of the invention it is provided that the agitator shaft is mounted at least twice within the tube. The deflections of the agitator shafts known from the prior art are advantageously avoided by this measure. Critical shaft speeds are mastered. Even under unfavorable structural conditions, the stirring tool can be provided at the optimal location for stirring and mixing.
Die Maßnahme, daß das Rührwerkzeug als Impeller mit einer das Rohr teilweise umhüllenden inneren und einer äußeren Oberfläche mit mindestens einem die beiden Oberflächen verbindenden Kanal ausgebildet ist, dient zur Verbesserung der selbstreinigenden Eigenschaft des Rührwerkzeugs. Beim Betrieb des Rührwerkzeugs wird der innere Bereich um das Lager ständig mit dem zu mischenden Produkt gespült. Im Falle einer Reinigung erreicht die Reinigungsflüssigkeit auch die schwer zugänglichen Stellen im Bereich der Lager.The measure that the stirring tool is designed as an impeller with an inner surface partially enveloping the tube and an outer surface with at least one channel connecting the two surfaces serves to improve the self-cleaning property of the stirring tool. When the mixing tool is in operation, the inner area around the bearing is constantly rinsed with the product to be mixed. In the case of cleaning, the cleaning liquid also reaches the hard-to-reach places in the area of the bearings.
In Verbindung damit, daß der Kanal ein Gefälle aufweist, kann das Produkt oder die Reinigungsflüssigkeit nach Entleeren des Behälters auch aus dem Rührwerkzeug auslaufen.In connection with the fact that the channel has a gradient, the product or the cleaning liquid can also run out of the stirring tool after the container has been emptied.
Die hermetische Trennung des Behälterinnenraumes wird dadurch erreicht, daß das Rohr am antriebsseitigen Ende eine Dichtung oder Dichtfläche aufweist.The hermetic separation of the container interior is achieved in that the tube has a seal or sealing surface at the drive end.
Die Befestigung des Rührwerkzeuges am Behälter wird erleichtert, wenn das Rohr am antriebsseitigen Ende einen Montageflansch aufweist.The attachment of the stirring tool to the container is made easier if the tube has a mounting flange at the drive end.
Die Maßnahme, daß eine zweite Kupplung zwischen Antrieb und Rührwerkswelle angeordnet ist, dient der leichteren Zerlegung des Rührwerks.The measure that a second clutch is arranged between the drive and agitator shaft serves to facilitate disassembly of the agitator.
Bei temperaturkritischen Prozessen ist es vorteilhaft, wenn das Rohr einen Innenraum aufweist, der beheizbar oder kühlbar ausgebildet ist.In temperature-critical processes, it is advantageous if the tube has an interior that is heatable or coolable.
Demselben Zweck dient die Maßnahme, daß das Rohr selbst kühlbar oder heizbar, zu diesem Zweck vorzugsweise doppelwandig, ausgebildet ist.The same purpose is served by the measure that the tube itself is coolable or heatable, preferably double-walled for this purpose.
Die Merkmale des Rührwerks wirken sich besonders vorteilhaft aus, wenn das Rührwerk in Behältern für mikrobiologische Prozesse verwendet wird.The characteristics of the agitator are particularly advantageous when the agitator is used in containers for microbiological processes.
Konstruktiv läßt sich das Rührwerk noch weiter vereinfachen, wenn der Antrieb im Rohr angeordnet ist, vorzugsweise unter Verzicht auf eine Welle.The design of the agitator can be further simplified if the drive is arranged in the tube, preferably without a shaft.
Die Erfindung wird in einer Figur beschrieben, wobei weitere vorteilhafte Einzelheiten der Figur zu entnehmen sind. Die Figur zeigt im einzelnen:
- Fig. 1
- das erfindungsgemäße Magnetrührwerk in einem Axialschnitt.
- Fig. 1
- the magnetic stirrer according to the invention in an axial section.
In Figur 1 bezeichnet 1 ein Lager- und Schutzrohr, innerhalb dessen eine Antriebswelle 2 mittels Lager 7 und 8 drehbar fixiert ist. Das untere Ende des Lager- und Schutzrohres 1 ist als topfartiges Spaltrohr ausgebildet, das den Abschluß des Lager- und Führungsrohres bildet. In das Spaltrohr 12 ragt die Rührwerkswelle 2 hinein, die an ihrem unteren Ende eine mit mehreren Permanentmagneten bestückte Magnetscheibe 5 drehfest trägt. Das Spaltrohr 12 wird außen von Impellerkopf 13 teilweise umhüllt. Im Inneren des Impellerkopfes 13 ist der Magnetscheibe 5 gegenüberliegend eine nicht dargestellte Anzahl entgegengesetzt polarisierter Permanentmagnete angeordnet, so daß sich durch die magnetischen Kräfte zwischen Magnetscheibe 5 und den Permanentmagneten berührungsfrei ein Drehmoment von Antriebswelle 2 auf den Impellerkopf 13 übertragen läßt. Als Rührwerkzeuge trägt der Impellerkopf 13 an Stegen befestigte Flügel 4. Die Lagerung des Impellerkopfes erfolgt durch das produktgeschmierte Gleitlager 6, daß auf einen an Spaltrohr 12 nach unten angeformten Wellenstummel 14 sitzt.In FIG. 1, 1 denotes a bearing and protective tube, within which a
Die innere Vertiefung mit Oberfläche 15 des Impellers 13 ist über Kanal 3 mit der äußeren Oberfläche 16 des Impellers 13 verbunden. Bei Drehung des Impellers wird von dem teilweise radial nach außen gerichteten Kanal 3 ein Pumpeffekt erzeugt, der die im topfförmigen Hohlraum des Impellers 13 vorhandene Flüssigkeit nach außen strömen läßt. Die innere Oberfläche des Impellers wird dadurch ständig mit Produktflüssigkeit gespült, was einen selbstreinigenden Effekt bewirkt.The inner depression with the
Das obere Ende des Führungs- und Lagerrohres läuft in einer Führungsfläche 17 mit anschließendem Montageflansch 18 aus. In der Führungsfläche 17 ist eine Dichtnut mit Dichtung 11 eingeformt, die den Spalt zwischen Führungsfläche 17 und Montagestutzen 19 in Behälterwandung 20 schließt. In Figur 1 ist der Montagestutzen 19 und Wandung 20 in unterbrochener Linienführung dargestellt.The upper end of the guide and bearing tube ends in a
Zum Zwecke des Antriebs ist die Rührwerkswelle 2 über Kupplung 9 und Getriebe 21 mit Antrieb 10 verbunden. Der Antrieb 10 und das Getriebe 21 sind koaxial direkt auf dem Montageflansch 18 festgeschraubt.For the purpose of driving, the
Dadurch ist eine sehr platzsparende und robuste Rührwerkskonstruktion verwirklicht, die die Nachteile der bekannten Rührwerke vermeidet.This results in a very space-saving and robust agitator construction which avoids the disadvantages of the known agitators.
In bestimmten Fällen können als Antrieb auch feststehende Wicklungen innerhalb des Führungsrohres 1 angeordnet werden, die bei entsprechender Ansteuerung, beispielsweise mittels bekannter Schrittsteuerungen ein Drehfeld erzeugen, die dann berührungslos das erforderliche Antriebsmoment für das Rührwerkzeug liefern.In certain cases, fixed windings can also be arranged as a drive within the
- 11
- Lager- und SchutzrohrBearing and protection tube
- 22nd
- RührwerkswelleAgitator shaft
- 33rd
- Kanalchannel
- 44th
- Flügelwing
- 55
- MagnetscheibeMagnetic disc
- 66
- Gleitlagerbearings
- 77
- Lagerwarehouse
- 88th
- Lagerwarehouse
- 99
- Kupplungclutch
- 1010th
- Antriebdrive
- 1111
- Dichtungpoetry
- 1212th
- SpaltrohrCan
- 1313
- ImpellerkopfImpeller head
- 1414
- WellenstummelWave stub
- 1515
- innere Oberflächeinner surface
- 1616
- äußere Oberflächeouter surface
- 1717th
- FührungsflächeLeadership area
- 1818th
- MontageflanschMounting flange
- 1919th
- MontagestutzenAssembly socket
- 2020th
- BehälterwandungContainer wall
- 2121
- Getriebetransmission
Claims (12)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4232935A DE4232935C2 (en) | 1992-10-01 | 1992-10-01 | Magnetic stirrer |
| DE4232935 | 1992-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0590472A1 true EP0590472A1 (en) | 1994-04-06 |
| EP0590472B1 EP0590472B1 (en) | 1996-12-11 |
Family
ID=6469333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93115170A Expired - Lifetime EP0590472B1 (en) | 1992-10-01 | 1993-09-21 | Magnetic stirrer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0590472B1 (en) |
| JP (1) | JPH07788A (en) |
| DE (1) | DE4232935C2 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19544529C2 (en) * | 1995-11-29 | 2000-03-09 | Alfred Wanner | Magnetic stirring system with forced convection to avoid dead spaces and two-phase stirring reactor |
| DE19963542C2 (en) * | 1999-12-22 | 2003-08-28 | Freyer Thomas | Device for mixing multi-component fluids |
| DE10318599A1 (en) * | 2003-04-24 | 2004-11-11 | Mavag Verfahrenstechnik Ag | Stirrer for mixing, homogenizing and dispersing |
| DE102009021992B3 (en) * | 2009-05-19 | 2010-12-09 | PRG Präzisions-Rührer GmbH | Magnet stirring unit for use in sterile area of e.g. food industry for stirring different media, has control magnets and supporting magnet that are provided as electro magnets and connected with magnet control device |
| DE102010016014A1 (en) | 2010-03-18 | 2011-09-22 | PRG Präzisions-Rührer GmbH | Driving unit useful for a stirrer, comprises a separating pot, a mixing head with a stirring tool fixed rotatably on separating pot and a stator unit fixed in a stationary manner in separating pot to drive mixing head via magnetic coupling |
| DE102012005640B4 (en) | 2012-03-21 | 2017-01-26 | Festo Ag & Co. Kg | mixing device |
| DE102012019215B4 (en) | 2012-10-01 | 2014-10-30 | Sartorius Stedim Biotech Gmbh | Stirrer installation aid and method for installing a stirrer in a bioreactor |
| DE202013012407U1 (en) | 2013-05-08 | 2016-10-11 | Liquitec Ag | magnetic stirrer |
| DE102014204156A1 (en) * | 2014-03-06 | 2015-09-10 | Volkswagen Aktiengesellschaft | electric motor |
| DE102015106566B3 (en) | 2015-04-28 | 2016-06-09 | PRG Präzisions-Rührer GmbH | Drive unit for a stirrer and agitator |
| DE102016005240B4 (en) * | 2016-04-29 | 2018-12-13 | Sartorius Stedim Biotech Gmbh | mixing device |
| JP6770734B2 (en) * | 2016-07-05 | 2020-10-21 | ヤヨイ化学工業株式会社 | Rotor separation type stirrer |
| DE102016114546A1 (en) * | 2016-08-05 | 2018-02-08 | Hans Heidolph GmbH | stirrer |
| DE102016114545A1 (en) * | 2016-08-05 | 2018-02-08 | Hans Heidolph GmbH | stirrer |
| DE202017103837U1 (en) * | 2017-06-27 | 2018-10-01 | Hans Heidolph GmbH | Stirring device, in particular overhead stirrer |
| CN112942751A (en) * | 2021-04-19 | 2021-06-11 | 深圳市汇德绘设计事务有限公司 | Indoor wall painting device for building decoration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210651A2 (en) * | 1985-08-02 | 1987-02-04 | Inoue Seisakusho (Mfg) Co., Ltd. | Treating device for agitating and the like |
| JPS6336825A (en) * | 1986-07-28 | 1988-02-17 | Satake Kagaku Kikai Kogyo Kk | Agitation device |
| US4806020A (en) * | 1986-04-21 | 1989-02-21 | Sendai Mechanic Kogyo Kabushiki Kaisha | Magnetic rotator |
| US5061079A (en) * | 1989-03-10 | 1991-10-29 | Satake Chemical Equipment Mfg., Ltd. | Stirrer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1905322C3 (en) * | 1969-02-04 | 1974-06-06 | Andreas Hofer Hochdrucktechnik Gmbh, 4330 Muelheim | Device for automatically restarting a synchronous permanent magnet clutch that has fallen out of step |
| DE3637863A1 (en) * | 1986-11-06 | 1988-05-19 | Horst Haering | STIRRING DEVICE |
| DE3839693A1 (en) * | 1988-11-24 | 1990-05-31 | Normag Labor Und Verfahrenstec | Agitator seal |
| DE3942679A1 (en) * | 1989-12-22 | 1991-06-27 | Ekato Ind Anlagen Verwalt | MIXING DEVICE |
-
1992
- 1992-10-01 DE DE4232935A patent/DE4232935C2/en not_active Expired - Fee Related
-
1993
- 1993-09-21 EP EP93115170A patent/EP0590472B1/en not_active Expired - Lifetime
- 1993-10-01 JP JP5245815A patent/JPH07788A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210651A2 (en) * | 1985-08-02 | 1987-02-04 | Inoue Seisakusho (Mfg) Co., Ltd. | Treating device for agitating and the like |
| US4806020A (en) * | 1986-04-21 | 1989-02-21 | Sendai Mechanic Kogyo Kabushiki Kaisha | Magnetic rotator |
| JPS6336825A (en) * | 1986-07-28 | 1988-02-17 | Satake Kagaku Kikai Kogyo Kk | Agitation device |
| US5061079A (en) * | 1989-03-10 | 1991-10-29 | Satake Chemical Equipment Mfg., Ltd. | Stirrer |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 12, no. 248 (C - 511)<3095> 13 July 1988 (1988-07-13) * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4232935A1 (en) | 1994-04-07 |
| DE4232935C2 (en) | 1996-03-28 |
| JPH07788A (en) | 1995-01-06 |
| EP0590472B1 (en) | 1996-12-11 |
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