EP0222085B1 - Bucket for a swing-type rotor centrifuge - Google Patents

Bucket for a swing-type rotor centrifuge Download PDF

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Publication number
EP0222085B1
EP0222085B1 EP86111809A EP86111809A EP0222085B1 EP 0222085 B1 EP0222085 B1 EP 0222085B1 EP 86111809 A EP86111809 A EP 86111809A EP 86111809 A EP86111809 A EP 86111809A EP 0222085 B1 EP0222085 B1 EP 0222085B1
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EP
European Patent Office
Prior art keywords
centrifuge
cup
beaker
arcuate surface
groove
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
Application number
EP86111809A
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German (de)
French (fr)
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EP0222085A3 (en
EP0222085A2 (en
Inventor
Dieter Müller
Christian Hirsch
Peter Dr. Pantucek
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Thermo Electron LED GmbH
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Heraeus Sepatech GmbH
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Priority to AT86111809T priority Critical patent/ATE45686T1/en
Publication of EP0222085A2 publication Critical patent/EP0222085A2/en
Publication of EP0222085A3 publication Critical patent/EP0222085A3/en
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Publication of EP0222085B1 publication Critical patent/EP0222085B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
    • B04B5/0421—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted

Definitions

  • the present invention relates to a centrifuge cup for rotors of the swivel cup type with two cutouts formed on opposite outer sides in the upper cup wall for receiving the rotor carrying bolts, each cutout having a bottom surface and being delimited by an arcuate surface on its side facing the cup opening.
  • centrifuge cups are known, for example, from DE-AS 2 637 900 and US Pat. No. 4,531,652. These beakers are used, for example, to hold sample beakers or test tubes, for which purpose, if necessary, separate insert inserts for such tubes can be inserted into the centrifuge beaker. Since such centrifuge beakers are subjected to high forces during centrifugation, they are preferably made from an injection molding, for example an aluminum injection molding.
  • centrifuge cups made of a plastic material are known from DE-PS 29 38 317, in which, at least in the area of the suspension, metal parts are used for reinforcement.
  • centrifuge beakers mentioned above are used in rotors, as are described, inter alia, in US Pat. No. 4,147,294 or DE-GM 77 22 184.
  • the present invention is based on the object of specifying a centrifuge cup in which, in comparison to conventional centrifuge cups, higher load change cycles can be achieved and higher gravity fields can be driven without the known material fatigue in the area of the recesses receiving the supporting bolts, in particular in the form of cracks. occur.
  • the bottom surface of the recess has a dome-like depression which is arranged in the region of the ridge of the arcuate surface adjacent to it and in that at least one groove is formed in the ridge region of the arcuate surface.
  • the centrifuge cups designed according to the invention have proven themselves to be excellent in test runs. Compared to conventional centrifuge cups, they are characterized by higher achievable load change cycles without recognizable material fatigue. The cup weight is not increased by the measure according to the invention and nevertheless a higher stability is achieved.
  • a centrifuge beaker which has at least one further groove on both sides of the at least one groove on the comb area of the arc-shaped surface has proven successful. These additional grooves result in an even distribution of the load in the recess receiving the support bolt.
  • the arcuate surface of the recess is designed such that it widens in a funnel shape towards the bottom surface.
  • the centrifuge cup lies only with the front edge of the curved surface in the idle state.
  • a slight bending of the cup can be determined, so that there is a linear support of the curved surface in the axial direction of the carrying bolt. It has proven advantageous here for the surface to widen at an angle between 15 '(minutes) to 10 to the pivot axis of the cup. With this linear support, the cup is optimally supported on the rotor support bolts.
  • the end of the at least one groove formed in the curved surface should form part of the spherical recess in the bottom surface of the recess.
  • the centrifuge cup shown in the figures is a double blood cup bag, the cup volume of which, as can be seen in particular from FIGS. 1 and 2, is divided into two cup areas 2 by a partition 1.
  • a partition 1 In the upper area of the cup wall 3, offset by approximately one third of the cup height from the upper cup edge 4 to the center of the cup, there are recesses 5 on opposite outer sides Recording of not shown rotor support bolts.
  • These recesses 5 have a flat bottom surface 6 and they are delimited at the top, ie towards the cup edge 4 or the cup opening 7, by an arcuate surface 8.
  • the recess 5 is open so that the double blood bag cup can be placed on the supporting bolts of the centrifuge rotor from above. So that the cup can pivot freely on the support bolts of the rotor, the two opposite outer sides, in which the recesses 5 are formed, are flattened parallel to one another.
  • a groove 12 is formed in the area of the comb 10 of the arcuate surface 8, namely in the direction of the pivot axis 19 of the rotor support bolts, which merges into the dome-like recess 11, indicated in FIG. 4 by the reference number 13.
  • At least one further groove 14 is milled into the arcuate surface 8 on both sides of the at least one groove 12, as shown in FIG. 4, as is illustrated with reference to FIGS. 5 and 6. While the groove 12 runs out into the dome-like recess 11, the two further grooves 14 in this exemplary embodiment end in the corner region of the recess 5, which is formed by the bottom surface 6 and the curved surface 8. Instead of these three grooves, an embodiment is also possible in which two grooves are formed in the arc-shaped surface 8, these two arc-shaped grooves then, according to the exemplary embodiment according to FIG. 4, to merge into the dome-like depression 11.
  • a design of the recess 5 in which the arcuate surface 8 extends in a funnel shape towards the bottom surface 6 has a particularly advantageous effect on the tension conditions of the centrifuge cup.
  • This undercut of the arcuate surface 8 has the effect that, at the beginning of the centrifuging process, the cup only rests with the outer edge 15 on the carrying bolt, indicated by the dash-dotted line 16 in FIG. 4. With increasing speed and thus increasing load, the cup is deformed until a linear support is formed along the top of the pin. Depending on the load (loading, speed, etc.) and the associated deformation of the cup, the angle of the undercut, designated by reference number 17, should be between 15 '(minutes) to 10.
  • the axis 18 of the dome-like depression (see FIG. 6) runs in the direction of the pivot axis 19 (see FIG. 3) of the centrifuge cup.
  • the groove end of at least one groove 12 forms part of the dome-shaped recess 11, i.e. in cross section, the groove 12 has a radius corresponding to the dome-like depression 11. This measure has the particular advantage that the groove 12 and the dome-like recess 11 can be milled in one operation.

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  • Centrifugal Separators (AREA)

Abstract

A centrifuge bowl for oscillating bowl type rotors with two grooves in opposite sides of the bowl to receive the rotor-bearing pins, so that each groove has a bottom surface and is bound on the side facing the bowl aperture by a curved surface is provided. This achieves higher load change cycles so that higher fields of gravity are possible without the occurrence of the usual material fatigue in the area of the grooves receiving the bearing-pins, that is, of fissuration, because the bottom surface has a cup-shaped indentation which, in the peak area of the curved surface is located ajacent to the latter, and there is at least one slot opening into the indentation in the peak area of the curved surface.

Description

Die vorliegende Erfindung betrifft einen Zentrifugenbecher für Rotoren vom Schwenkbechertyp mit zwei an gegenüberliegenden Außenseiten in der oberen Becherwandung ausgebildeten Aussparungen zur Aufnahme der Rotor-Tragebolzen, wobei jede Aussparung eine Bodenfläche aufweist und auf ihrer zur Becheröffnung zugekehrten Seite von einer bogenförmigen Fläche begrenzt ist.The present invention relates to a centrifuge cup for rotors of the swivel cup type with two cutouts formed on opposite outer sides in the upper cup wall for receiving the rotor carrying bolts, each cutout having a bottom surface and being delimited by an arcuate surface on its side facing the cup opening.

Derartige Zentrifugenbecher sind beispielsweise aus der DE-AS 2 637 900 und der US-PS 4 531 652 bekannt. Diese Becher dienen beispielsweise zur Aufnahme von Probenbechern oder Proberöhrchen, wozu, falls erforderlich, gesonderte Aufnahme-Einsätze für solche Röhrchen in den Zentrifugenbecher eingesetzt werden können. Da solche Zentrifugenbecher beim Zentrifugieren hohen Kräften ausgesetzt sind, werden sie bevorzugt aus einem Spritzguß, beispielsweise einem Aluminium-Spritzguß, gefertigt.Such centrifuge cups are known, for example, from DE-AS 2 637 900 and US Pat. No. 4,531,652. These beakers are used, for example, to hold sample beakers or test tubes, for which purpose, if necessary, separate insert inserts for such tubes can be inserted into the centrifuge beaker. Since such centrifuge beakers are subjected to high forces during centrifugation, they are preferably made from an injection molding, for example an aluminum injection molding.

In der US-PS 4 148 433 ist ein Schwenkbecher für Zentrifugen beschrieben, der an Tragbolzen schwenkbar gehalten wird. Zur Verringerung der Reibung ist entweder auf den Lagerzapfen ein O-Ring aufgesetzt oder aber in die Lagerausnehmung des Bechers ein Gleitteil eingefügt.In US-PS 4 148 433 a swivel cup for centrifuges is described, which is pivotally held on supporting bolts. To reduce the friction, either an O-ring is placed on the bearing journal or a sliding part is inserted into the bearing recess of the cup.

Darüber hinaus sind aus der DE-PS 29 38 317 solche Zentrifugenbecher aus einem Kunststoffmaterial bekannt, bei denen, zumindest im Bereich der Aufhängung, zur Verstärkung Metallteile eingesetzt sind.In addition, such centrifuge cups made of a plastic material are known from DE-PS 29 38 317, in which, at least in the area of the suspension, metal parts are used for reinforcement.

Die vorstehend angesprochenen Zentrifugenbecher werden in Rotoren eingesetzt, wie sie unter anderem in der US-PS 4 147 294 oder dem DE-GM 77 22 184 beschrieben sind.The centrifuge beakers mentioned above are used in rotors, as are described, inter alia, in US Pat. No. 4,147,294 or DE-GM 77 22 184.

Infolge der ständigen Lastwechsel, denen solche Zentrifugenbecher unterliegen, und der hohen Spitzenbelastungen beim Zentrifugieren sind häufig nach höheren Zyklenzahlen, Rißbildungen im Bereich der Aussparungen, in denen die Rotor-Tragebolzen eingreifen, zu beobachten, solche Zentrifugenbecher müssen aus Sicherheitsgründen ausgewechselt werden. Um längere Lebensdauern, das heißt höhere Zyklenzahlen, bei solchen Zentrifugenbechern zu erreichen, wurden bereits die Bechervolumina und damit das Eigengewicht der Zentrifugenbecher verringert unter Inkaufnahme eines geringeren nutzbaren Bechervolumens. Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, einen Zentrifugenbecher anzugeben, bei dem im Vergleich zu herkömmlichen Zentrifugenbechern höhere Lastwechsel-Zyklen erreichbar und höhere Schwerefelder fahrbar sind, ohne daß die bekannten Materialermüdungen im Bereich der die Tragbolzen aufnehmenden Aussparungen, insbesondere in Form von Rißbildungen, auftreten.As a result of the constant load changes to which such centrifuge cups are subject and the high peak loads during centrifugation, cracks can often be observed in the area of the recesses in which the rotor carrying bolts engage after higher cycles, such centrifuge cups must be replaced for safety reasons. In order to achieve longer lifetimes, i.e. higher number of cycles, with such centrifuge cups, the cup volumes and thus the weight of the centrifuge cups have already been reduced while accepting a lower usable cup volume. The present invention is based on the object of specifying a centrifuge cup in which, in comparison to conventional centrifuge cups, higher load change cycles can be achieved and higher gravity fields can be driven without the known material fatigue in the area of the recesses receiving the supporting bolts, in particular in the form of cracks. occur.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß die Bodenfläche der Aussparung eine kalottenartige Vertiefung aufweist, die im Bereich des Kammes der bogenförmigen Fläche angrenzend an diese angeordnet ist und daß im Kammbereich der bogenförmigen Fläche wenigstens eine in die Vertiefung auslaufende Nut ausgebildet ist. Die erfindungsgemäß ausgebildeten Zentrifugenbecher haben sich in Testläufen ausgezeichnet bewährt. Sie zeichnen sich gegenüber den herkömmlichen Zentrifugenbechern durch höhere erreichbare Lastwechsel-Zyklen ohne erkennbare Materialermüdungserscheinungen aus. Durch die erfindungsgemäße Maßnahme wird das Bechergewicht nicht erhöht und trotzdem eine höhere Stabilität erreicht.This object is achieved according to the invention in that the bottom surface of the recess has a dome-like depression which is arranged in the region of the ridge of the arcuate surface adjacent to it and in that at least one groove is formed in the ridge region of the arcuate surface. The centrifuge cups designed according to the invention have proven themselves to be excellent in test runs. Compared to conventional centrifuge cups, they are characterized by higher achievable load change cycles without recognizable material fatigue. The cup weight is not increased by the measure according to the invention and nevertheless a higher stability is achieved.

Gut bewährt hat sich ein Zentrifugenbecher, der im Kammbereich der bogenförmigen Fläche beidseitig der wenigstens einen Nut jeweils mindestens eine weitere Nut aufweist. Durch diese zusätzliche Nuten wird eine noch gleichmäßigere Lastverteilung in der den Tragbolzen aufnehmenden Aussparung erzielt.A centrifuge beaker which has at least one further groove on both sides of the at least one groove on the comb area of the arc-shaped surface has proven successful. These additional grooves result in an even distribution of the load in the recess receiving the support bolt.

In einer besonders vorteilhaften Ausgestaltung des Zentrifugenbechers ist die bogenförmige Fläche der Ausnehmung so ausgebildet, daß sie sich zur Bodenfläche hin trichterförmig erweitert. Durch diese Maßnahme liegt der Zentrifugenbecher im Ruhezustand nur mit der vorderen Kante der bogenförmigen Fläche auf. Im Betrieb ist, mit wachsender Belastung, ein geringfügiges Verbiegen des Bechers festzustellen, so daß es zu einer linienförmigen Auflage der bogenförmigen Fläche in axialer Richtung des Tragebolzens auf diesen kommt. Hierbei hat es sich als vorteilhaft erwiesen, daß sich die Fläche unter einem Winkel zwischen 15' (Minuten) bis 10 zur Schwenkachse des Bechers erweitert. Mit dieser linienförmigen Auflage wird der Becher optimal auf den Rotor-Tragebolzen gelagert.In a particularly advantageous embodiment of the centrifuge cup, the arcuate surface of the recess is designed such that it widens in a funnel shape towards the bottom surface. As a result of this measure, the centrifuge cup lies only with the front edge of the curved surface in the idle state. In operation, with increasing load, a slight bending of the cup can be determined, so that there is a linear support of the curved surface in the axial direction of the carrying bolt. It has proven advantageous here for the surface to widen at an angle between 15 '(minutes) to 10 to the pivot axis of the cup. With this linear support, the cup is optimally supported on the rotor support bolts.

In einer bevorzugten Ausgestaltung des Zentrifugenbechers sollte das Ende der mindestens einen, in der bogenförmigen Fläche ausgebildeten Nut einen Teil der kalottenförmigen Ausnehmung in der Bodenfläche der Aussparung bilden.In a preferred embodiment of the centrifuge beaker, the end of the at least one groove formed in the curved surface should form part of the spherical recess in the bottom surface of the recess.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. In der Zeichnung zeigt

  • Figur 1 einen Schnitt durch einen Doppelblutbeutelbecher entlang der Schnittlinie I - I in Figur 2,
  • Figur 2 eine Draufsicht auf den Zentrifugenbecher nach Figur 1,
  • Figur 3 einen Schnitt entlang der Schnittlinie 111 - 111 in Figur 2, wobei die Bechertrennwand im unteren Bereich nicht dargestellt ist,
  • Figur 4 eine Ausschnittsvergrößerung des Ausschnittes IV in Figur 3,
  • Figur 5 eine Sicht in Richtung des Pfeiles V in Figur 4 mit einer gegenüber Figur 4 abgewandelten Ausnehmung und
  • Figur 6 einen Schnitt entlang der Schnittlinie VI - VI in Figur 5.
Further details and features of the invention result from the following description of exemplary embodiments with reference to the drawing. In the drawing shows
  • FIG. 1 shows a section through a double blood bag cup along the section line I - I in FIG. 2,
  • FIG. 2 shows a top view of the centrifuge cup according to FIG. 1,
  • FIG. 3 shows a section along the section line 111-111 in FIG. 2, the cup partition wall not being shown in the lower region,
  • FIG. 4 shows an enlargement of detail IV in FIG. 3,
  • Figure 5 is a view in the direction of arrow V in Figure 4 with a modified compared to Figure 4 and
  • FIG. 6 shows a section along the section line VI-VI in FIG. 5.

Bei dem in den Figuren dargestellten Zentrifugenbecher handelt es sich um einen Doppelblutbecherbeutel, dessen Bechervolumen, wie insbesondere aus den Figuren 1 und 2 ersichtlich ist, durch eine Trennwand 1 ein zwei Becherbereiche 2 unterteilt ist. Im oberen Bereich der Becherwandung 3, etwa um ein Drittel der Becherhöhe vom oberen Becherrand 4 zur Bechermitte hin versetzt, sind an gegenüberliegenden Außenseiten Aussparungen 5 zur Aufnahme von nicht dargestellten Rotor-Tragebolzen ausgebildet. Diese Aussparungen 5 weisen eine ebene Bodenfläche 6 auf und sie werden nach oben, d.h. zum Becherrand 4 bzw. zur Becheröffnung 7 hin, durch eine bogenförmige Fläche 8 begrenzt. Nach unten, d.h. zum Boden 9 des Zentrifugenbechers hin, ist die Aussparung 5 offen, so daß der Doppleblutbeutelbecher von oben auf die Tragbolzen des Zentrifugenrotors aufgesetzt werden kann. Damit der Becher auf den Tragebolzen des Rotors frei schwenken kann, sind die beiden gegenüberliegenden Außenseiten, in denen die Aussparungen 5 ausgebildet sind, parallel zueinander verlaufend abgeflacht.The centrifuge cup shown in the figures is a double blood cup bag, the cup volume of which, as can be seen in particular from FIGS. 1 and 2, is divided into two cup areas 2 by a partition 1. In the upper area of the cup wall 3, offset by approximately one third of the cup height from the upper cup edge 4 to the center of the cup, there are recesses 5 on opposite outer sides Recording of not shown rotor support bolts. These recesses 5 have a flat bottom surface 6 and they are delimited at the top, ie towards the cup edge 4 or the cup opening 7, by an arcuate surface 8. At the bottom, ie towards the bottom 9 of the centrifuge cup, the recess 5 is open so that the double blood bag cup can be placed on the supporting bolts of the centrifuge rotor from above. So that the cup can pivot freely on the support bolts of the rotor, the two opposite outer sides, in which the recesses 5 are formed, are flattened parallel to one another.

Bei herkömmlichen Zentrifugenbechern sind, infolge der ständigen Lastwechsel nach größen Zyklenzahlen feine Risse im Bereich des Zenites der Aussparungen 5 zu beobachten, so daß diese Becher aus Sicherheitsgründen dann ersetzt werden müssen. Bei dem in den Zeichnungen dargestellten erfindungsgemäßen Zentrifugenbecher wird nunmehr in der Bodenfläche 6 jeder Aussparung 5 eine kalottenartige Vertiefung 11 vorgesehen, die angrenzend an die bogenförmige Fläche 8 angeordnet ist.In conventional centrifuge beakers, fine cracks can be observed in the area of the zenith of the recesses 5 due to the constant load changes after large number of cycles, so that these beakers must then be replaced for safety reasons. In the centrifuge cup according to the invention shown in the drawings, a dome-like depression 11 is now provided in the bottom surface 6 of each recess 5 and is arranged adjacent to the curved surface 8.

Weiterhin ist im Bereich des Kammes 10 der bogenförmigen Fläche 8 eine Nut 12 ausgebildet, und zwar in Richtung der Schwenkachse 19 der Rotor-Tragebolzen verlaufend, die in die kalottenartige Vertiefung 11, in Figur 4 durch die Bezugsziffer 13 angedeutet, übergeht. Diese Maßnahmen, d.h. die Nut 12 und die kalottenartige Vertiefung 11, wirken sich vorteilhaft auf die Spannungsverhältnisse des Bechers im Bereich der Bolzenaufhängung auf, so daß derartig ausgestaltete Zentrifugenbecher höher belastbar sind, ohne daß die bisher beobachteten Risse auftreten.Furthermore, a groove 12 is formed in the area of the comb 10 of the arcuate surface 8, namely in the direction of the pivot axis 19 of the rotor support bolts, which merges into the dome-like recess 11, indicated in FIG. 4 by the reference number 13. These measures, i.e. the groove 12 and the dome-like depression 11 have an advantageous effect on the stress conditions of the cup in the region of the pin suspension, so that centrifuge cups designed in this way can be subjected to higher loads without the cracks previously observed occurring.

In einer weiteren Optimierung des Zentrifugenbechers wird beidseitig der wenigstens einen Nut 12, wie diese in Figur 4 gezeigt ist, jeweils mindestens eine weitere Nut 14 in die bogenförmige Fläche 8 eingefräst, wie dies anhand der Figuren 5 und 6 dargestellt ist. Während die Nut 12 in die kalottenartige Vertiefung 11 ausläuft, enden die beiden weiteren Nuten 14 in diesem Ausführungsbeispiel im Eckbereich der Aussparung 5, der durch die Bodenfläche 6 und die bogenförmige Fläche 8 gebildet wird. Anstelle dieser drei Nuten ist auch eine Ausführungsform möglich, in der zwei Nuten in der bogenförmigen Fläche 8 ausgebildet sind, wobei diese beiden bogenförmigen Nuten dann, entsprechend dem Ausführungsbeispiel nach Figur 4, in die kalottenartige Vertiefung 11 übergehen sollten.In a further optimization of the centrifuge beaker, at least one further groove 14 is milled into the arcuate surface 8 on both sides of the at least one groove 12, as shown in FIG. 4, as is illustrated with reference to FIGS. 5 and 6. While the groove 12 runs out into the dome-like recess 11, the two further grooves 14 in this exemplary embodiment end in the corner region of the recess 5, which is formed by the bottom surface 6 and the curved surface 8. Instead of these three grooves, an embodiment is also possible in which two grooves are formed in the arc-shaped surface 8, these two arc-shaped grooves then, according to the exemplary embodiment according to FIG. 4, to merge into the dome-like depression 11.

Besonders vorteilhaft auf die Spannungsverhältnisse des Zentrifugenbechers wirkt sich eine Ausgestaltung der Aussparung 5 aus, bei der die bogenförmige Fläche 8 trichterförmig zur Bodenfläche 6 hin sich erweiternd verläuft. Durch diese Hinterschneidung der bogenförmigen Fläche 8 wird bewirkt, daß zu Beginn des Zentrifugiervorganges der Becher nur mit der äußeren Kante 15 auf dem Tragebolzen, durch die strichpunktierte Linie 16 in Figur 4 angedeutet, aufliegt. Mit zunehmender Drehzahl und damit zunehmender Belastung tritt eine Verformung des Bechersauf, bis sich eine linienförmige Auflage entlang der Oberseite des Bolzens einstellt. Je nach Belastung (Beladung, Drehzahl etc.) und der damit zusammenhängenden Verformung des Bechers sollte der Winkel der Hinterschneidung, durch Bezugsziffer 17 bezeichnet, zwischen 15' (Minuten) bis 10 liegen.A design of the recess 5 in which the arcuate surface 8 extends in a funnel shape towards the bottom surface 6 has a particularly advantageous effect on the tension conditions of the centrifuge cup. This undercut of the arcuate surface 8 has the effect that, at the beginning of the centrifuging process, the cup only rests with the outer edge 15 on the carrying bolt, indicated by the dash-dotted line 16 in FIG. 4. With increasing speed and thus increasing load, the cup is deformed until a linear support is formed along the top of the pin. Depending on the load (loading, speed, etc.) and the associated deformation of the cup, the angle of the undercut, designated by reference number 17, should be between 15 '(minutes) to 10.

In bevorzugten Ausführungsformen verläuft die Achse 18 der kalottenartigen Vertiefung (siehe Figur 6) in Richtung der Schwenkachse 19 (siehe Figur 3) des Zentrifugenbechers. Außerdem bildet das Nutende zumindest der einen Nut 12 einen Teil der kalottenförmigen Ausnehmung 11, d.h. die Nut 12 weist im Querschnitt einen der kalottenartigen Vertiefung 11 entsprechenden Radius auf. Diese Maßnahme hat insbesondere den Vorteil, daß die Nut 12 und die kalottenartige Vertiefung 11 in einem Arbeitsgang eingefräst werden können.In preferred embodiments, the axis 18 of the dome-like depression (see FIG. 6) runs in the direction of the pivot axis 19 (see FIG. 3) of the centrifuge cup. In addition, the groove end of at least one groove 12 forms part of the dome-shaped recess 11, i.e. in cross section, the groove 12 has a radius corresponding to the dome-like depression 11. This measure has the particular advantage that the groove 12 and the dome-like recess 11 can be milled in one operation.

Claims (5)

1. A centrifuge beaker for rotors of the pivotal beaker type, with two recesses (5) formed in the upper beaker wall (3) on opposite outer sides for reception of the rotor carrier pins, wherein each recess (5) has a bottom surface (6) and is delimited by an arcuate surface (8) at its side directed towards the beaker opening, characterized in that the bottom surface (6) has a cuplike depression (11) which is situated in the region of the crest (10) of the arcuate surface (8) and bordering thereon and that at least one groove (12) leading out into the depression (11) is formed in the crest region (10) of the arcuate surface (8).
2. A centrifuge beaker according to Claim 1, characterized in that at least one further groove (14) is formed on each side of the at least one groove (12) in each case, in the crest region (10) of the arcuate surface (8).
3. A centrifuge beaker according to one of Claims 1 or 2, characterized in that the arcuate surface (8) widens in a funnel shape towards the bottom surface (6).
4. A centrifuge beaker according to one of claims 1 to 3, characterized in that the axis (18) of the depression (11) extends in the direction of the pivoting axis (19) of the beaker.
5. A centrifuge beaker according to Claim 3, characterized in that the arcuate surface (8) widens at an angle (17) of between 15', and 1° of the beaker.
EP86111809A 1985-11-11 1986-08-26 Bucket for a swing-type rotor centrifuge Expired EP0222085B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111809T ATE45686T1 (en) 1985-11-11 1986-08-26 CENTRIFUGE BUCKETS FOR SWING BUCKET TYPE ROTORS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539916 1985-11-11
DE3539916A DE3539916C1 (en) 1985-11-11 1985-11-11 Centrifuge cup for rotors of the swivel cup type

Publications (3)

Publication Number Publication Date
EP0222085A2 EP0222085A2 (en) 1987-05-20
EP0222085A3 EP0222085A3 (en) 1988-06-08
EP0222085B1 true EP0222085B1 (en) 1989-08-23

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EP86111809A Expired EP0222085B1 (en) 1985-11-11 1986-08-26 Bucket for a swing-type rotor centrifuge

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US (1) US4804100A (en)
EP (1) EP0222085B1 (en)
JP (1) JPS62114670A (en)
AT (1) ATE45686T1 (en)
DE (2) DE3539916C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718885A (en) * 1986-12-18 1988-01-12 E. I. Du Pont De Nemours And Company Swinging bucket centrifuge rotor having an uninterrupted knife edge pivot
US5624370A (en) * 1995-12-15 1997-04-29 Sorvall Products, L.P. Bucket for use in a swinging bucket centrifuge rotor
US5728038A (en) * 1997-04-25 1998-03-17 Beckman Instruments, Inc. Centrifuge rotor having structural stress relief
DE102009015111A1 (en) * 2009-03-31 2010-10-14 Andreas Hettich Gmbh & Co. Kg Centrifuge beaker for separating blood into cell and plasma, has universal socket assigned in joint region and connected with centrifuge beaker in joint region, and pivot pin accommodator provided for accommodating pivot pin
JP6195023B2 (en) * 2014-09-30 2017-09-13 日立工機株式会社 Centrifuge and swing rotor for centrifuge
EP3311925B1 (en) 2016-10-24 2019-05-01 Sigma Laborzentrifugen GmbH Centrifuge bucket and centrifuge

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US3128905A (en) * 1964-04-14 Wire handle for a molded container
US3341047A (en) * 1966-05-10 1967-09-12 Abbott Lab Container and bail construction
US4032066A (en) * 1976-03-15 1977-06-28 Beckman Instruments, Inc. Adapters for centrifuge rotors
US4148433A (en) * 1977-06-29 1979-04-10 Beckman Instruments, Inc. Friction reducing insert for swinging bucket rotors
DE7722184U1 (en) * 1977-07-15 1977-10-27 Heraeus-Christ Gmbh, 3360 Osterode Centrifuge rotor
US4147294A (en) * 1978-02-22 1979-04-03 Beckman Instruments, Inc. Rotor carrier for microtitration plate
DE2938317C2 (en) * 1979-09-21 1983-04-28 Fa. Andreas Hettich, 7200 Tuttlingen Centrifuge cups made of plastic material
US4342419A (en) * 1980-10-31 1982-08-03 Beckman Instruments, Inc. Safety cover for centrifuge bucket
US4439177A (en) * 1981-10-26 1984-03-27 Beckman Instruments, Inc. Rotor bucket liner
US4531652A (en) * 1984-06-25 1985-07-30 Kabushiki Kaisha Kubota Seisakusho Bucket for use in centrifugal separators

Also Published As

Publication number Publication date
DE3539916C1 (en) 1986-11-13
ATE45686T1 (en) 1989-09-15
JPS6316174B2 (en) 1988-04-07
JPS62114670A (en) 1987-05-26
DE3665137D1 (en) 1989-09-28
EP0222085A3 (en) 1988-06-08
US4804100A (en) 1989-02-14
EP0222085A2 (en) 1987-05-20

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