EP0380761A1 - Zentrifugenbecher - Google Patents

Zentrifugenbecher Download PDF

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Publication number
EP0380761A1
EP0380761A1 EP89119715A EP89119715A EP0380761A1 EP 0380761 A1 EP0380761 A1 EP 0380761A1 EP 89119715 A EP89119715 A EP 89119715A EP 89119715 A EP89119715 A EP 89119715A EP 0380761 A1 EP0380761 A1 EP 0380761A1
Authority
EP
European Patent Office
Prior art keywords
cup
wall
centrifuge
plane
beaker
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.)
Withdrawn
Application number
EP89119715A
Other languages
German (de)
English (en)
French (fr)
Inventor
Manfred Meyer
Peter Dr. Pantucek
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.)
Heraeus Sepatech GmbH
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Heraeus Sepatech GmbH
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heraeus Sepatech GmbH, Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Heraeus Sepatech GmbH
Publication of EP0380761A1 publication Critical patent/EP0380761A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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 invention relates to a centrifuge cup for a rotor of the swivel cup type with two recesses formed on opposite outer walls in the region of the upper cup wall for receiving a carrying bolt each with a cylindrical recess as a specimen holder, which is mirror-symmetrical to two mutually perpendicular planes, the line of intersection with the axis of the cylindrical recess coincides, is constructed, the pivot axis of which lies in one plane.
  • centrifuge beakers are, for example, from the product information "Cryofuge R " 7000 (1.5M 4.88 / VNKr) from Heraeus Sepatech GmbH, D-3360 Osterode, on page 7 under accessory no. 607 can be seen.
  • Such a centrifuge beaker is suspended in a swing-out rotor with its recesses in support bolts which are arranged at the end of support arms, either a sample container or a plurality of sample tubes is inserted into the cylindrical recess.
  • a collar or collar is attached to the outer wall of the centrifuge cup, which reinforces this area of the cup.
  • a centrifuge cup of the same type is known from DE-OS 22 64 901. It is used specifically to hold blood bottles that are stored for soft or gentle storage via a liquid cushion and / or rubber insert in the holder of the centrifuge cup.
  • centrifuge cups have proven themselves well in use. However, in order to give them sufficient stability for the high forces occurring during centrifuging, they must be dimensioned sufficiently thick in their wall thickness. This applies in particular to the areas of the cup where the bearings engage and the areas of the floor-wall transition. As the known centrifuge beakers show, the areas that are particularly stressed are reinforced by material accumulation, for example in the form of an upper collar.
  • centrifuge beakers are subject to a plastic, reversible deformation, which inevitably leads to material fatigue after high load cycle cycles. If the sample bottles inserted into the receptacle of the centrifuge beaker, which are sometimes glass bottles, lie very close to the inner wall, such a deformation of the centrifuge beaker can lead to rupture.
  • the invention has for its object to provide a centrifuge cup of the type mentioned, which has increased stability compared to the known centrifuge cups with the same receiving volume and the same material, the wall thicknesses of the centrifuge cup should be minimized with a view to a low weight and small external dimensions .
  • the wall of the cup is reinforced in the upper region which has the cutouts in the direction of the plane which is perpendicular to the plane containing the pivot axis and the maximum of the wall thickness is in this plane in each case.
  • This formation of the different wall thicknesses in the upper region of the centrifuge cup counteracts plastic deformation.
  • the overall width of the centrifuge cup is kept small in the direction of the swivel axis, while the maximum reinforcement of the wall lies in the plane perpendicular to it, that is, in the direction in which the swivel cup swings out during centrifugation. There is sufficient space in this direction when a centrifuge is at rest.
  • the areas stressed less with regard to the deformation of the beaker are kept low in the proposed centrifuge beaker. Due to the minimum wall thickness of the centrifuge cup in the direction of its swivel axis, the width of the centrifuge cup is kept small, which increases the usable volume between the support arms of a swivel cup rotor.
  • the wall in its lower part facing away from the cutouts is reinforced in the direction of the plane which receives the pivot axis, the maximum of the wall thickness in each case being in the region of the flanks of the cutouts. It has been shown that the maximum stresses of the centrifuge cup in its lower area are rotated by 90 ° to the stress maxima of the upper area of the cup.
  • the strengthening of the cup wall should be carried out continuously in the circumferential direction. H. there should be no jumps in the form of paragraphs.
  • Ovals viewed in cross sections, are preferably selected as the outer contour of the cup, with the contour in the area of the cutouts being supplemented by such lines in such an oval.
  • an additional collar or collar can be useful, which adjoins the outer contour of the cup in a uniform thickness.
  • the cup, including the collar is usually made from a single cast; as an alternative, there is also the possibility to design the collar as a glass fiber ring.
  • the maximum reinforcement of the cup wall should be 50% - 100% compared to the minimum thickness of the cup wall. be. In contrast to this, the maximum reinforcement of the cup wall in the lower part of the cup should be rotated by 90 ° to the reinforcement in the upper region in comparison to the minimum thickness of the cup wall, 100% - 300%.
  • the centrifuge cup as shown in particular in FIG. 1, can be divided into a central area 1, a bottom area 2 and an upper area 3, which is reinforced with a collar or collar 4.
  • a recess 5 is milled in the form of a vertical groove, which ends in the collar or collar 4 of the centrifuge cup.
  • the trunnions of a support ring rotor are hung, on which the centrifuge cup then swings out during centrifugation.
  • the pivot axis of the centrifuge cup 1 is identified in FIG. 1 by the reference number 6.
  • the centrifuge cup has a cylindrical recess 7 as a sample holder.
  • a sample e.g. in a glass bottle.
  • the walls In the longitudinal direction 4, i.e. Seen in the direction of the axis 8 of the cylindrical recess 7, the walls have a different wall thickness, which changes from top to bottom with respect to horizontal cuts, with a mirror symmetry with respect to two mutually perpendicular planes 8, 9 with an intersection line of the planes with the axis 8 of the cylindrical recess 7 coincides, is observed.
  • the levels 9, 10 are oriented such that the pivot axis 6 runs in the level 9.
  • the centrifuge beaker In the upper region 3 of the centrifuge beaker, its wall is thickened in the direction of the plane 10, which is perpendicular to the plane 9 containing the pivot axis 6, while its thickness is tapered towards the plane 9 or recess 5.
  • the outer contour of the cup forms an oval, the collar 4 having a constant thickness around the entire circumference of the cup.
  • the thickness 11 of the wall of the cup in the upper region 3 in the direction of the plane 10 is twice the thickness 12 of the wall in the region of the plane 9. The transition between these different thicknesses 11, 12 takes place continuously, i. H. there are no jump points or discontinuities.
  • the different wall thicknesses of the cup are rotated by 90 ° from the central area 1 to the bottom area 2, i. H. the smallest thickness 11 of the wall is in the direction of the plane 10, while the greatest thickness 12 is 90 ° in the direction of the plane 9.
  • the greatest wall thickness of the cup in the area adjoining the recess 5 is three times the smallest wall thickness running in the direction of the plane 10.

Landscapes

  • Centrifugal Separators (AREA)
EP89119715A 1989-02-03 1989-10-24 Zentrifugenbecher Withdrawn EP0380761A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893903236 DE3903236C1 (enrdf_load_stackoverflow) 1989-02-03 1989-02-03
DE3903236 1989-02-03

Publications (1)

Publication Number Publication Date
EP0380761A1 true EP0380761A1 (de) 1990-08-08

Family

ID=6373382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119715A Withdrawn EP0380761A1 (de) 1989-02-03 1989-10-24 Zentrifugenbecher

Country Status (2)

Country Link
EP (1) EP0380761A1 (enrdf_load_stackoverflow)
DE (1) DE3903236C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112611881A (zh) * 2020-12-11 2021-04-06 杭州微智兆智能科技有限公司 一种检测加样定位机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062231B4 (de) * 2004-12-23 2012-12-13 Thermo Electron Led Gmbh Rotor für Laborzentrifugen
DE102009015111A1 (de) 2009-03-31 2010-10-14 Andreas Hettich Gmbh & Co. Kg Zentrifugenbecher
EP3311925B1 (de) 2016-10-24 2019-05-01 Sigma Laborzentrifugen GmbH Zentrifugenbecher und zentrifuge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264901A1 (de) * 1972-03-14 1975-10-16 Hettich Andreas Fa Zentrifugenbecher zum einhaengen in den schleuderkopf einer zentrifuge
EP0054744A2 (en) * 1980-12-23 1982-06-30 E.I. Du Pont De Nemours And Company Centrifuge rotor having vertically offset trunnion pins

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264901A1 (de) * 1972-03-14 1975-10-16 Hettich Andreas Fa Zentrifugenbecher zum einhaengen in den schleuderkopf einer zentrifuge
EP0054744A2 (en) * 1980-12-23 1982-06-30 E.I. Du Pont De Nemours And Company Centrifuge rotor having vertically offset trunnion pins

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112611881A (zh) * 2020-12-11 2021-04-06 杭州微智兆智能科技有限公司 一种检测加样定位机构
CN112611881B (zh) * 2020-12-11 2023-08-01 杭州微智兆智能科技有限公司 一种检测加样定位机构

Also Published As

Publication number Publication date
DE3903236C1 (enrdf_load_stackoverflow) 1990-03-29

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19891102

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Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19910806

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18D Application deemed to be withdrawn

Effective date: 19911217