EP0934121B1 - Zentrifuge zur haematokritmessung - Google Patents
Zentrifuge zur haematokritmessung Download PDFInfo
- Publication number
- EP0934121B1 EP0934121B1 EP97954932A EP97954932A EP0934121B1 EP 0934121 B1 EP0934121 B1 EP 0934121B1 EP 97954932 A EP97954932 A EP 97954932A EP 97954932 A EP97954932 A EP 97954932A EP 0934121 B1 EP0934121 B1 EP 0934121B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- side walls
- centrifuge according
- chambers
- chamber
- 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 - Lifetime
Links
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
- B04B2007/025—Lids for laboratory centrifuge rotors
Definitions
- the invention relates to a hematocrit centrifuge according to the Preamble of claim 1.
- Hematocrit centrifuge is known in the design become that in a rotatingly driven rotor individual capillary tubes filled with blood star-shaped from the center (axis of rotation) of the rotor are stored outwards, with the Securing the position of the individual capillary tubes spacing cams evenly distributed around the circumference the bottom surface of the rotor were arranged. Between these A capillary tube was placed in each cam, and thus secured against displacement. The face of each The capillary tube then lay on the inner circumference of the Rotors.
- Such an embodiment has the disadvantage that when Fracture of a capillary tube containing the contents in the rotor is distributed and the rotor very dirty.
- pollution is not on the site of the broken Capillary tube is limited, but can spread over the Spread the entire inner surface of the rotor.
- US 3,009,388 also goes from the prior art which also discloses a hematocrit centrifuge.
- This also has a star-shaped division in the Plate on and is up with a lid completed.
- this lid is designed that there is a gap at its radially outer edge opposite the rim of the rotor, so that the Ends of the capillary tubes open with the adjacent ones arranged chambers are connected. That means with one Fracture of one or more capillary tubes occurs Contents caused by centrifugal and contaminated, such as described above, the neighboring chambers.
- the invention has for its object a hematocrit centrifuge of the type mentioned at the beginning, that the capillary tubes are better protected against breakage and that if a capillary tube breaks, the resulting Contamination not in the area of the other capillary tubes reach.
- each Capillary tubes in a separate chamber is arranged, which chamber is formed by the Bottom surface of the rotor and the side walls of each Chamber is formed by associated side walls that are sealingly connected to the bottom surface of the rotor, and that these side partitions of the chamber up to the radially outer end of the rotor extends so that the radially outer wall of each Chamber formed by the inner surface (edge) of the rotor becomes.
- the side walls of the respective chambers integrally connected to the bottom of the rotor are.
- the rotor is preferably made of a plastic injection molded part or a plastic casting or one Metal part formed so that the parts mentioned are all made are made of the same material.
- the chamber-forming side walls of the rotor is formed from a separate insert, which Insert e.g. is made of plastic or metal and which sealing on the bottom surface of the rotor is glued to turn a tight seal between the bottom surface and the side walls of each chamber in the rotor to reach.
- Insert e.g. is made of plastic or metal and which sealing on the bottom surface of the rotor is glued to turn a tight seal between the bottom surface and the side walls of each chamber in the rotor to reach.
- each chamber is otherwise formed by drawn walls that are made of one piece of material are formed with the side walls.
- the chamber-forming Side walls not up to the radially outer edge of the rotor, but stop beforehand and close extend a room at a greater distance.
- the side walls of this room turn out Ribs are formed that are roughly the top edge of the Continue side walls so that the one formed thereby Recording space 34 again in continuation of the rest of the chamber forms a sealed closure to the secondary chambers.
- the upper limit of all chambers is by the way formed on the rotor lid, which directly sealing on the upper end faces of the side walls seated.
- the aforementioned recording room is used for recording the remains of a broken capillary tube, which could break during the spin cycle.
- the volume of this receiving space is chosen to be larger than the volume of the more radially inward chamber spaces for the capillary tube. This ensures that essentially in the radially inward space between the individual side walls the capillary tube is received over, for example, 2/3 of its length with little play between the side walls, while the side walls then open into the larger-volume, radially outer receiving space. So there is a break in the capillary tube, for example in the area of a small distance from each other Side walls, then the remnants of the capillary tube together with the contents are transported to the area of the larger-volume receiving space due to the acting centrifugal force and collected there. Contamination of the neighboring chamber is impossible due to the sealing closure.
- the bottom surface of the Recording space in the direction radially outwards downwards is chamfered to shrink the contents of the capillary tube into the recessed and approximately flush with to ensure the insert cup fits the bottom surface.
- Each insert cup is supported with its closed one Rear wall on the edge (inner surface) of the rotor and points otherwise surrounding walls so that there is only one Front opening for picking up dirt forms.
- Each insert cup is preferably made of plastic trained and each capillary tube continues with its radially outward facing end face on the rear wall of the Insert cup and is cushioned there because of Insert cup preferably made of an elastomeric plastic consists.
- the rotor 1 consists of a rotationally symmetrical body, which is an outer, raised Has edge 8.
- a receptacle 2 is formed for a drive shaft, and the The drive shaft is by a central bottom flange 3 added, which can be coupled to the drive shaft is.
- the drive shaft engages with one Coupling part 36 ( Figure 7) through a receiving opening 9 in Motor through, on this coupling part 36 Cover 28 ( Figure 7) is placed in place.
- the cover 28 sits on the inner parts of the rotor 1 and lies with its outer circumference on the inner circumference of the edge 8 of the rotor 1.
- each chamber is formed through the bottom surface 4 and side walls 15, which in mutual distance sealing with the bottom surface 4 are connected.
- the inner wall of each chamber 14 is through a raised inner wall 33 of the side walls 15 is formed.
- the bottom surface 4 is formed from a rising branch 5 (FIG. 3) and from a branch 5 rising radially subsequent descending branch 6, which one after downward slope 13 forms.
- the respective Capillary tube 27 (see Figure 7) is now only about 2/3 of its length on the ascending Branch 5 of the bottom surface 4 forms a distance above the descending branch 6 and lies with its end face on the Rear wall 26 of an insert cup 19 each in turn the radially outer end of each Chamber 14 forms.
- a capillary tube 27 can thus be of a simple type a Mikado stick removed from its chamber 14 by simply pointing your finger in the direction of the arrow 30 from above onto the end of the Capillary tube 27 is pressed and this in Direction of arrow 31 pivots out of its chamber 14.
- the swiveling movement takes place in the area of the Vertex 7 of the bottom surface 4.
- the side walls 15 open outwards, respectively two adjacent side walls are Y-shaped into one rib 17 extending outward in the radial direction unite which rib 17 is now in turn sealing with the Edge 8 of the rotor 1 is connected.
- This opens up each chamber 14 into a larger receiving space 34 Diameter and larger width.
- the external limitation of the Recording space 34 is first through on the floor surface a recessed, circumferential channel 12 is formed, in which the lower edge 23 is flush Insert cup 19 is used. Every insert cup consists of a rear wall 26 and one encircling, raised over the rear wall 26 encircling trained walls, namely an upper wall 20, one spaced therefrom and arranged parallel to it lower wall 23 and side walls 24. All walls 20, 23, 24 are connected to each other in one piece and with the Rear wall 26 is sealed.
- the insert cup 19 thus clad flush and liquid-conducting the radially outer end of the receiving space 34 out.
- Figure 7 shows that the inner edge 35 of the lower Wall 23 of the insert cup 19 is flush with the slope 13, so that the forming in the receiving space 34, contaminated material in the liquid Insert cup 19 flows in and is received.
- the side walls 24 sit flush and liquid-conducting the lateral receiving openings 10, 11 of the ribs 17, see above that from the side of the ribs 17 a liquid-tight Connection into the interior of the respective insert cup 19 is given.
- FIG. 6 shows in conjunction with FIG. 7 that the bottom bottom surface 25 (bottom outside) of each insert cup 19 sits sealingly in the groove 12 of the rotor 1.
- Figures 1 and 2 show that the side walls 15, like the neighboring legs of a Y over one each Combine transverse wall 18 into a rib 17.
- FIG. 7 shows that the cover 28 has a handle 29 which is snapped onto the associated coupling part 36 of the rotor drive shaft in a latching and spring-loaded manner.
- the spring-loaded detent can thus be triggered by pulling up the handle 29 and the cover 28 is removed from the rotor 1.
- the insert cups 19 are sealing on the outer circumference Edge 8 of the rotor 1 arranged and can be easily detached consequently easy to break if a capillary tube breaks can be removed from the rotor 1.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Seitenwänden, dann werden die Reste des Kapillar-Röhrchens samt des Inhalts aufgrund der wirkenden Zentrifugalkraft in den Bereich des größervolumigen Aufnahmeraumes transportiert und dort gesammelt. Eine Verschmutzung der Nachbarkammer ist aufgrund des dichtenden Abschlußes unmöglich.
Diese sind nun leicht nach oben in Richtung zum Deckel herausnehmbar ausgebildet, so daß diese zusammen mit den Verschmutzungen aus dem Rotor entfernt werden können.
- Figur 1:
- perspektivische Ansicht eines geöffneten Rotors ohne Deckel und Einsatzbecher,
- Figur 2:
- die Draufsicht auf die Anordnung nach Figur 1,
- Figur 3:
- der Schnitt gemäss der Linie A-A in Figur 4,
- Figur 4:
- schematisiert der Rotor in Seitenansicht,
- Figur 5:
- die Vorderansicht eines Einsatzbechers,
- Figur 6:
- die Seitenansicht eines Einsatzbechers,
- Figur 7:
- Schnitt durch einen vollbestückten Rotor.
Vorteil der geschilderten Maßnahmen ist also, daß jedes Kapillar-Röhrchen 27 in einer ihm zugeordneten Kammer separat für sich genommen gelagert ist und daß bei Bruch eines Kapillar-Röhrchens dafür gesorgt wird, daß die Bruchteile und der Inhalt des zerbrochenen Kapillar-Röhrchens in der jeweiligen Kammer 14 bzw. in dem Aufnahmeraum 34 verbleiben und schließlich in jeweils einem Einsatzbecher 19 aufgenommen werden.
- 1
- Rotor
- 2
- Aufnahme
- 3
- Flansch
- 4
- Bodenfläche
- 5
- ansteigender Ast
- 6
- absteigender Ast
- 7
- Scheitelpunkt
- 8
- Rand
- 9
- Aufnahmeöffnung
- 10
- Aufnahmeöffnung
- 11
- "
- 12
- Rinne
- 13
- Schräge
- 14
- Kammer
- 15
- Seitenwand
- 16
- Vertiefung (Gewichtsersparnis)
- 17
- Rippe
- 18
- Querwand
- 19
- Einsatzbecher
- 20
- obere Wand
- 21
- Ansatz
- 22
- Aufnahmeöffnung
- 23
- Wand
- 24
- Seitenwand
- 25
- Bodenfläche
- 26
- Rückwand
- 27
- Kapillar-Röhrchen
- 28
- Deckel
- 29
- Griff
- 30
- Pfeilrichtung
- 31
- Pfeilrichtung
- 32
- Aussparung
- 33
- Innenwand
- 34
- Aufnahmeraum
- 35
- Rand (Einsatzbecher 19)
- 36
- Kupplungsteil
Claims (9)
- Hämatokrit-Zentrifuge zur Aufnahme von mit Proben gefüllten Kapillar-Röhrchen, wobei die Kapillar-Röhrchen sternförmig in einem Rotor in zugeordneten Halterungen angeordnet sind und sich mit ihrer radial äusseren Stirnseite am inneren Rand des Rotors abstützen wobei in dem Rotor (1), gleichmässig am Umfang verteilt voneinander, abgetrennte Kammern (14) angeordnet sind und daß in jeder Kammer ein Kapillar-Röhrchen (27) aufgenommen ist, wobei sich jede Kammer (14) radial auswärts in einen Aufnahmeraum (34) größeren Durchmessers öffnet, dadurch gekennzeichnet, daß die Kammern (14) durch einen auf den Kammern aufsitzenden, direkt abdichtenden Deckel (28) begrenzt sind.
- Hämatokrit-Zentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß jede Kammer gebildet ist durch jeweils eine innere, umlaufende Innenwand (33), die sich in radial nach aussen erstreckende Seitenwände (15) fortsetzt, welche Seitenwände zwischen sich rillenförmige Kammern (14) zur Aufnahme jeweils eines Kapillar-Röhrchens (27) bilden und daß das Kapillar-Röhrchen (27) lediglich auf der Bodenfläche (4) der Kammern (14) aufliegt.
- Hämatokrit-Zentrifuge nach Anspruch 1 und 2, dadurch gekennzeichnet, daß jeder Aufnahmeraum durch radial auswärts sich erstreckende, die Seitenwände (15) verlängernde Rippen (17) gebildet ist, welche Rippen (17) sich abdichtend am umlaufenden Rand (8) des Rotors (1) anlegen.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Innenwände (33), die Seitenwände (15) und die Rippen (17) werkstoffeinstückig mit dem Material des Rotors (1) ausgebildet sind.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Innenwand (33), die Seitenwände (15) und die Rippen (17) aus einem vom Rotor (1) getrennten Material ausgebildet sind und abdichtend mit dem Rotor (1), insbesondere mit seiner Bodenfläche und mit seinem umlaufenden Rand 8, verbunden sind.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der radial aussenliegende Teil der Aufnahme räume (34) durch jeweils einen Einsatzbecher (19) gebildet ist, welcher abdichtend und flüssigkeitsleitend in den Aufnahmeraum (34) eingesetzt ist.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß jeder Einsatzbecher aus einer Rückwand besteht, an welcher die Stirnseiten der Kapillar-Röhrchen (25) anliegen und daß sich über die Rückwand (26) umlaufende, insich geschlossene Wände (20,23,24) anschließen, welche in Aufnahmeöffnungen (10,11,12) am Rand (8) des Rotors (1) abdichtend eingesetzt sind.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Bodenfläche des radial sich nach aussen erstreckenden Aufnahmeraumes (34) von einer nach unten gerichteten Schräge (13) gebildet ist, an deren radial aussenliegendem Ende der Einsatzbecher (19) mit seinem inneren Rand (35) bündig die Schräge (13) fortsetzt.
- Hämatokrit-Zentrifuge nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß jeder Einsatzbecher (19) leicht lösbar in den Rotor (1) eingesetzt ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19652436 | 1996-12-17 | ||
DE19652436A DE19652436A1 (de) | 1996-12-17 | 1996-12-17 | Hämatokrit-Zentrifuge |
PCT/EP1997/007189 WO1998026875A1 (de) | 1996-12-17 | 1997-12-05 | Hämatokrit-zentrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0934121A1 EP0934121A1 (de) | 1999-08-11 |
EP0934121B1 true EP0934121B1 (de) | 2002-07-17 |
Family
ID=7814964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97954932A Expired - Lifetime EP0934121B1 (de) | 1996-12-17 | 1997-12-05 | Zentrifuge zur haematokritmessung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0934121B1 (de) |
DE (2) | DE19652436A1 (de) |
WO (1) | WO1998026875A1 (de) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE137471C (de) * | ||||
DE134245C (de) * | ||||
DE74849C (de) * | P. V. P. BERG in Kopenhagen, Rörholmsgade 18 | Apparat zur Bestimmung des Fettinhaltes von Flüssigkeiten, besonders des Rahminhaltes der Milch | ||
US2783938A (en) * | 1954-11-15 | 1957-03-05 | Internat Equipment Company | Centrifuge for capillary tubes |
US3009388A (en) * | 1957-12-30 | 1961-11-21 | American Optical Corp | Apparatus for determining fluid fractions and sedimentataion rates |
GB917063A (en) * | 1959-09-07 | 1963-01-30 | Mach Shop Equipment Ltd | Improvements in or relating to centrifuging apparatus |
SE8501947L (sv) * | 1985-04-22 | 1986-10-23 | Landstingens Inkopscentral | Laboratoriecentrifug |
DE8716160U1 (de) * | 1987-12-07 | 1988-01-28 | Fa. Andreas Hettich, 7200 Tuttlingen | Schutzvorrichtung für Kapillarröhrchen |
GB9116806D0 (en) * | 1991-08-03 | 1991-09-18 | Rickman Laurence R | Centrifuge rotor |
US5487719A (en) * | 1994-01-14 | 1996-01-30 | Denver Instrument Company | Centrifuge rotor assembly |
-
1996
- 1996-12-17 DE DE19652436A patent/DE19652436A1/de not_active Withdrawn
-
1997
- 1997-12-05 WO PCT/EP1997/007189 patent/WO1998026875A1/de active IP Right Grant
- 1997-12-05 DE DE59707745T patent/DE59707745D1/de not_active Expired - Lifetime
- 1997-12-05 EP EP97954932A patent/EP0934121B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1998026875A1 (de) | 1998-06-25 |
DE19652436A1 (de) | 1998-06-18 |
EP0934121A1 (de) | 1999-08-11 |
DE59707745D1 (de) | 2002-08-22 |
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