EP0109652B1 - Zentrifuge - Google Patents

Zentrifuge Download PDF

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Publication number
EP0109652B1
EP0109652B1 EP83111445A EP83111445A EP0109652B1 EP 0109652 B1 EP0109652 B1 EP 0109652B1 EP 83111445 A EP83111445 A EP 83111445A EP 83111445 A EP83111445 A EP 83111445A EP 0109652 B1 EP0109652 B1 EP 0109652B1
Authority
EP
European Patent Office
Prior art keywords
shaft
centrifuge
chamber
drive
pulley
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
EP83111445A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0109652A3 (en
EP0109652A2 (de
Inventor
Houshang Dr. Lolachi
Bernd Dr. Mathieu
Wolfram Weber
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.)
Fresenius SE and Co KGaA
Original Assignee
Fresenius SE and Co KGaA
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 Fresenius SE and Co KGaA filed Critical Fresenius SE and Co KGaA
Priority to AT83111445T priority Critical patent/ATE34676T1/de
Publication of EP0109652A2 publication Critical patent/EP0109652A2/de
Publication of EP0109652A3 publication Critical patent/EP0109652A3/de
Application granted granted Critical
Publication of EP0109652B1 publication Critical patent/EP0109652B1/de
Expired 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
    • B04B5/0442—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes

Definitions

  • the invention relates to a centrifuge according to the preamble of claim 1.
  • the invention relates to a flow-through centrifuge in which materials are to be centrifuged in flow, for example when processing blood or plasma processing.
  • a problem with flow centrifuges is the connection between a stationary and stationary feed and discharge point with the rotating centrifuge chamber.
  • the relative movement of the two connection points occurring here causes the connection lines to twist.
  • rotating seals or rotary couplings are therefore used at the connection points.
  • Such rotary seals are expensive to manufacture and normally sealing material is removed under the influence of the rotation, which can lead to leaks.
  • the use of rotary seals is problematic, particularly when processing blood, since contamination of the environment and the processed blood is possible in the event of errors and leaks.
  • the sensitive components of the blood in particular thrombocytes, can be injured by the high friction or turbulence caused by a rotating rotary seal.
  • a hollow cylinder rotating with it is mounted on this shaft, which has a gear meshing with the fixed ring gear which is offset laterally to the axis of rotation and which rolls on the fixed ring gear when the hollow cylinder rotates.
  • a laterally offset auxiliary shaft is also attached to the hollow cylinder, which also carries a gear on its underside and top, the lower gear meshing with the first gear and also causing it to rotate.
  • the upper gear on the auxiliary shaft transmits its rotary motion to a drive gear for a centrifuge chamber, for example, which is mounted concentrically to the first shaft.
  • the gear ratio of the gear arrangement described is chosen so that the hollow cylinder moves at half the angular velocity and the same direction of rotation in comparison to the centrifuge chamber.
  • a disadvantage of the known arrangement is the use of gearwheels in general. This requires a very precise and therefore complex and expensive manufacture of the centrifuge. In addition, gears have to be serviced, for example lubricated, and generate relatively high running noise.
  • Another disadvantage is the tapping of the centrifuge chamber drive via the fixed ring gear. By rolling a gear on this fixed gear rim, the direction of rotation of the gear is reversed compared to the moving hollow cylinder. In order to achieve the required direction of rotation in the direction of rotation of the hollow cylinder, a gear wheel is therefore only required to reverse the direction of rotation, which also contributes to the high volume level, the maintenance intensity and the requirement for precise and therefore expensive production.
  • the drive movement for the centrifuge chamber is also supplied in the opposite direction of rotation and must be converted into the desired correct direction of rotation by using auxiliary shafts with auxiliary pulleys, corresponding to twice the angular velocity of the hollow cylinder.
  • the structure is generally complex and expensive and can lead to rather large and heavy rotating parts.
  • the resulting high centrifugal forces have to be mastered, which, due to the large loop of the inflow and outflow line that is required, place a great strain on them.
  • To twist or untwist the supply line it is guided in the known designs described above in eyelets or rings on the rotatable hollow cylinder.
  • the object of the invention is to create a generic centrifuge without reversing the direction of rotation, the rotating parts of which are simpler and smaller and which is therefore less expensive.
  • a drive arrangement is proposed in which the drive for the centrifuge chamber and for the rotatable line driver, which rotates the line loop at half the angular velocity in the same direction of rotation as the centrifuge chamber, takes place in parallel.
  • This is achieved in that both a first shaft for transmission of motion for the line driver and a second shaft for transmission of motion for the centrifuge chamber are connected to the drive shaft of a drive motor attached to the support frame via their own form-fitting gear connection.
  • the first shaft is designed as a hollow shaft for driving the line driver, through which the second shaft, also referred to as a chamber drive shaft, coaxially extends and rotatably supports.
  • the first shaft for driving the line driver and the chamber drive shaft can be driven directly by the motor output shaft in the same desired direction of rotation, the speed ratio of 2: 1 necessary for the disentangling being advantageously already set here by the appropriate choice of the transmission ratio.
  • a first embodiment of a centrifuge which consists essentially of a drive motor 1 on a support frame 2, a rotating frame 3, which is rotatably mounted on the supporting frame 2, and a centrifuge chamber 4 mounted on the rotating frame 3.
  • the drive motor carries on its vertically standing output shaft 5 two spaced pulleys 6 and 7, from which drive belts 8, 9 lead to further pulleys 10, 11.
  • the pulley 11 is seated at the lower end of a hollow shaft 12 which is supported and held in a bushing 13 by means of two bearings 14, 15.
  • the socket 13 is detachably connected to the support frame via screw connections 16, 17.
  • a flange piece is placed on the upper part of the hollow shaft 12, with which a lower support plate 18 of the rotating frame 3 is detachably connected via screw connections 19, 20.
  • the drive for the rotating frame 3 thus works as follows: when the drive motor 1 is switched on, the drive shaft 5 and thus the pulley 6 rotate at a certain angular velocity.
  • the pulley 11 on the hollow shaft 12 has twice the diameter of the pulley 6, so that the hollow shaft rotates through the transmission of motion with the aid of the drive belt 8 at half the angular velocity compared to the rotary movement of the drive motor 1. Due to the fixed connection of the rotating frame 3 to the hollow shaft 12, the rotating frame 3 thus also rotates at half the angular speed in comparison to the drive motor.
  • the pulley 7 has the same diameter as the pulley 10 connected to a chamber drive shaft 21.
  • the chamber drive shaft 21 projects through the hollow shaft 12 and is held in it by bearings 22, 23.
  • a further pulley 24 is attached to the top of the chamber drive shaft 21, which protrudes only slightly over the hollow shaft 12, which ends approximately with the lower support plate.
  • This pulley 24 is connected via a drive belt 25 to a pulley 26 which is attached to the underside of a vertically standing deflection shaft 27.
  • the deflection shaft is rotatably supported in bearings 29, 30 between the lower support plate 18 and an upper support plate 28 of the rotating frame 3, the upper and lower support plates 28, 18 being held at a distance by struts 31, 32 and are mounted.
  • the deflection shaft 27 is laterally offset relative to the axis of rotation of the hollow shaft 12 and the chamber drive shaft 21 in the outer region of the upper and lower support plates 28, 18.
  • the rotary movement is thus deflected from the central axis of rotation toward the side of the rotating frame 3.
  • the rotary movement is again directed to the central axis of rotation of the rotating frame 3 with the aid of a pulley 33 arranged on the upper side of the deflecting shaft 27 and a drive belt 34 running thereon.
  • the drive belt 34 lies there on a pulley 35 which is attached to the lower end of a vertically standing hollow shaft 36.
  • the hollow shaft 36 is supported by bearings 37, 38 in a bushing 39 which is detachably connected to the upper support plate 28 by screw connections 40, 41.
  • the hollow shaft 36 carries a flange 42 above the upper support plate 28 and thus outside the region of the rotating frame 3, on which the annular centrifuge chamber 4 is placed, the hollow shaft 36 protruding with its upper end 43 through a central recess in the centrifuge chamber 4.
  • the upper end 43 of the hollow shaft 36 carries a thread 44, onto which a union nut 45 is screwed for fixing the centrifuge chamber 4.
  • a funnel-shaped ring part 46 with edge regions bent outwards is inserted.
  • the drive for the centrifuge chamber 4 works as follows: When the drive motor 1 is switched on, the motor output shaft 5 and thus also the pulley 7 are driven at a specific speed. Since the pulleys 7, 10 have the same diameter, the chamber drive shaft 21 is driven at the same speed. The pulleys 24, 35 have the same diameter, and the pulleys 26, 33 have a different diameter, but also the same diameter. Thus, the deflection shaft 27 only deflects the rotary movement offset to the side, so that a free space remains between the pulley 24 and the funnel-shaped ring part 46, but the speed occurring on the hollow shaft 36 is not changed by this arrangement compared to the motor speed. The hollow shaft 36 and thus the centrifuge chamber 4 thus runs at the same speed as the drive motor 1 and at twice the speed compared to the speed of the rotating frame 3 (as explained above).
  • a flexible line 47 in which an inflow and outflow line or a whole bundle of inflow and outflow lines can be contained, is inserted from below into the hollow shaft 36 and is firmly connected to a connection point 48 on the centrifuge chamber.
  • the line 47 is looped upwards around the centrifuge chamber 4 to a fixed connection point 49.
  • a diagonally upward lead support 50 is attached, which ends in an openable ring 51 with a snap lock, in which the lead 47 is inserted.
  • the centrifuge previously described with its essential parts and the function of the drives for the rotating frame 3 and the centrifuge chamber 4 has the following function:
  • the medium to be centrifuged is from the fixed connection point, which can be attached to a container, for example, via line 47 supplied with the speed of the drive motor 1 rotating centrifuge chamber 4.
  • line 47 can contain both an inflow and an outflow line.
  • the rotating frame 3 is simultaneously moved at half the speed in comparison to the centrifuge chamber 4, so that the loop of the line 47, which is connected to the rotating frame 3 via the line support 50, around the centrifuge chamber 4 at half the speed is moved. As described at the beginning, this has the known effect that there is no twisting or twisting of the line 47.
  • the line 47 can move freely in the ring 51.
  • a major advantage of the embodiment shown is seen in its simple structure and the possibility of easy and quick access to all individual parts. Maintenance and replacement of parts can therefore be carried out very quickly and easily.
  • the motor 1 is easily detachable and replaceable from the support frame 2 with the aid of screw connections 52, 53.
  • the entire rotating frame 3 can be separated from the support frame 2 in a similarly simple manner by loosening the screw connections 16, 17. Furthermore, the unit consisting of the bushing 13, the hollow shaft 12 and the chamber drive shaft 21 can be easily taken apart.
  • the bearings 14, 15 between the bushing 13 and the hollow shaft 12, and the bearings 22, 23 between the hollow shaft 12 and the chamber drive shaft 21 are each held from the outside via screw connections 55, 56, after their loosening both the bearings 14, 15, 22, 23 and the socket 13, the hollow shaft 12 and the chamber drive shaft 21 can be separated from one another.
  • the pulleys 10, 24 are secured from the outside via circlip brackets 57, 58 and are easily detachable.
  • the rotating frame 3 with its lower support plate 18 can also be lifted off.
  • the deflection shaft 27 with the bearings 29, 30 and the pulleys 26, 33 can also be easily dismantled and at the same time adjusted, for example to set a suitable drive belt tension.
  • the bearings 30, 29 in which the deflection shaft 27 runs are in bearing blocks 59, 60 attached, which are displaceable laterally on the lower and upper support plate 18, 28 adjusting devices 61, 62 in the direction of the drive belt 25, 34. After loosening the adjusting devices 61, 62, the entire deflection shaft 27 can be removed, for example when changing the drive belts 25, 34.
  • FIG. 2 shows a further embodiment of a centrifuge, which is essentially identical to the embodiment shown in FIG. 1.
  • These parts are a drive motor 65 with rotary connections to a hollow shaft 66 and a chamber drive shaft 67, a rotating frame 68 being driven by the hollow shaft 66 and a centrifugal chamber 70 being driven by the chamber drive shaft via a deflection shaft 69 at twice the speed of the rotating frame 68.
  • the rotating frame 68 also has an upper support plate 71 here.
  • the centrifuge chamber 70 is here not mounted above the upper support plate 71 but below a pulley 72 within the area of the rotating frame 68.
  • a line 73 is inserted into the centrifuge chamber 70 from below and is guided with a loop over a line support 74 around the centrifuge chamber 70 to a fixed connection point 75 above the centrifuge in the axial direction of the centrifuge chamber axis.
  • the arrangement shown here has the advantage that the rotating masses are more concentrated than in the first embodiment and are therefore easier to control with regard to vibrations and imbalances.
  • the arrangement of the centrifuge chamber 70 within the rotating frame 68 makes the entire arrangement more compact.
  • the embodiment shown in FIG. 3 has no coaxial mounting of the chamber drive shaft in the hollow shaft.
  • the output shaft 81 of the drive motor in turn carries two spaced apart pulleys 82 and 83, from which drive belts 84 and 85 lead to the further pulleys 86 and 87.
  • the pulley 87 sits at the lower end of a chamber drive shaft 88 which is rotatably supported in the support frame 80 with the help of the bearings 89 and 90.
  • the chamber drive shaft 88 also extends through the rotating frame 91, in which it is rotatably mounted by means of the bearing 92. At the upper end there is in turn a pulley 93 which is connected via a drive belt 94 to a pulley 95 which is seated on the deflection shaft 96.
  • This deflection shaft 96 is rotatably supported at its lower end via the bearing 97 in the rotating frame 91 and extends at its upper end through the rotating frame 91, a further bearing 98 being provided for storage.
  • This upper end has a pulley 99, which is connected via a drive belt 100 to the pulley 101, which is seated on a hollow shaft 102.
  • This hollow shaft 102 is aligned with the axis of rotation of the chamber drive shaft, thus the central axis of rotation, while the axis of rotation of the deflection shaft 96 is laterally offset.
  • the hollow shaft 102 is rotatably supported at its lower end via the bearing 103 in the upper part of the rotating frame 91.
  • the drive train for the centrifuge chamber 104 which is attached to the upper end of the hollow shaft 102, extends from the pulley 83 via the drive belt 85, the pulley 87, the chamber drive shaft 88, the pulley 93, the drive belt 94, the pulley 95, the Deflection roller 96, the pulley 99, the drive belt 100, the pulley 101 and the hollow shaft 102.
  • the diameter of the pulleys 83 and 87, the pulleys 93 and 101 and the pulleys 95 and 99 are identical.
  • the output shaft 81 and the hollow shaft 102 rotate at the same angular velocity.
  • the gear train for driving the centrifuge chamber 104 is essentially the same as the gear train of the embodiment shown in FIG. 1. Only the pulley 99 and, in a corresponding manner, the pulley 101 are located above the rotating frame 91. On the other hand, however, the arrangement of these pulleys within the rotating frame 91 may also be possible, as shown in FIG. 1.
  • the rotating frame drive shaft 106 is laterally offset from the chamber drive shaft 88, that is, it does not lie in the central axis of rotation of the entire arrangement.
  • This rotating frame drive shaft 106 passes through the support frame 80 and is mounted and held therein with the bearing 107.
  • the pulley 86 which is connected to the output shaft 81 via the drive belt 84, is fastened to the rotating frame drive shaft 106 below the support frame.
  • the pulleys 82 and 86 advantageously have the same diameter knife so that shafts 81 and 106 rotate at the same angular velocity.
  • This rotating frame drive system has a further pulley 108 in a fastened arrangement at its other end above the support frame.
  • This pulley 108 is located below the rotating frame 91 and is not in contact with it.
  • This pulley 110 is fastened to the underside of the rotating frame 91 and has a recess 111 through which the chamber drive shaft 88 passes.
  • this pulley 110 is not in contact with the centrifuge chamber drive train.
  • the pulley 110 In order to establish the required 2: 1 drive ratio between the centrifuge chamber and the rotating frame, the pulley 110 has twice the diameter of the pulley 108, with the result that the rotating frame 91 is rotated at half the speed in comparison to the drive motor.
  • the drive train for moving the rotating frame 91 extends from the drive shaft 81, the pulley 82, the driving belt 84, the pulley 86, the rotating frame drive shaft 106, the pulley 108, the driving belt 109, the pulley 110 to the rotating frame 91.
  • the output shaft can coincide with one of the two drive shafts, that is to say with the chamber drive shaft 88 or with the rotating frame drive shaft 106.
  • the output shaft 81 coincides with the rotating frame drive shaft 106.
  • pulleys 82, 83 and 86 are omitted, a pulley 112 being provided instead of the pulley 86, which corresponds to the pulley 83 in shape and effect.
  • This pulley 112 is connected to the pulley 87 by an extended drive belt 113.
  • the rotating frame drive shaft 106 is extended in the direction of the drive motor M with a shoulder 114 which is driven directly by the drive motor M.
  • FIG. 3 shows in a basic embodiment the arrangement of the drive trains and their storage in the support frame 80 and the rotating frame 91.
  • the structural details of these drive trains correspond to those of the embodiment according to FIGS. 1 and 2, so that the described therein Flanges and bushings are also used here.
  • Belt drives are used as rotary connections in the described embodiments. These belt drives have an advantageously low noise level and are therefore preferred. However, the effect according to the invention is also achieved with gear drives in the drive according to the invention, since the direction of rotation is reversed after each gear connection, but in particular the centrifuge chamber and the rotation frame are rotated in the same direction because no planetary movement is carried out.
  • the features of the invention show a centrifuge without rotary or grinding seals, with which a known speed ratio between a centrifuge chamber and a line driver of 2: 1 is achieved.
  • the drive for this is simplified by the arrangement, in particular the coaxial arrangement of the drive shafts, since the desired same directions of rotation are always generated. This leads to a compact and simple structure in which the rotating masses are kept small.
  • the 2: 1 gear ratio between the individual gears and pulleys is normally preferred to achieve the 2: 1 ratio in the rotational speeds between the centrifuge chamber 4, 70 and 104 on the one hand and the rotatable cable carrier on the other.
  • the diameter ratio insofar as it is specified above with 2: 1, can also be selected differently, for example with 1: 1 or otherwise, including possible intermediate values, as long as it is ensured that the thereby compensating for differences in rotational speeds resulting from the described embodiments by appropriate selection of the gear ratios of other gear wheels or pulleys, in order to ensure that the explained speed ratio between the centrifuge chamber and the line driver is ultimately achieved.

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  • Centrifugal Separators (AREA)
EP83111445A 1982-11-18 1983-11-15 Zentrifuge Expired EP0109652B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111445T ATE34676T1 (de) 1982-11-18 1983-11-15 Zentrifuge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823242541 DE3242541A1 (de) 1982-11-18 1982-11-18 Zentrifuge
DE3242541 1982-11-18

Publications (3)

Publication Number Publication Date
EP0109652A2 EP0109652A2 (de) 1984-05-30
EP0109652A3 EP0109652A3 (en) 1985-10-09
EP0109652B1 true EP0109652B1 (de) 1988-06-01

Family

ID=6178378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111445A Expired EP0109652B1 (de) 1982-11-18 1983-11-15 Zentrifuge

Country Status (5)

Country Link
US (1) US4540397A (zh)
EP (1) EP0109652B1 (zh)
JP (1) JPH0651133B2 (zh)
AT (1) ATE34676T1 (zh)
DE (2) DE3242541A1 (zh)

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JPS61245855A (ja) * 1985-04-22 1986-11-01 Green Cross Corp:The 連続式血液分離装置
DE8907335U1 (de) * 1989-06-15 1990-10-18 Espe Stiftung & Co Produktions- und Vertriebs KG, 8031 Seefeld Mischvorrichtung für Pasten
DE4220232A1 (de) * 1992-06-20 1993-12-23 Fresenius Ag Zentrifuge
DE4310975C2 (de) * 1993-04-03 1997-04-03 Fresenius Ag Schlauchanordnung für eine gleitdichtungsfreie Zentrifuge
DE4330905C2 (de) * 1993-09-11 1995-06-14 Fresenius Ag Verriegelungsvorrichtung für eine Lageranordnung einer Separationskammer einer Zentrifuge
US5514069A (en) * 1993-12-22 1996-05-07 Baxter International Inc. Stress-bearing umbilicus for a compact centrifuge
US5989177A (en) * 1997-04-11 1999-11-23 Baxter International Inc. Umbilicus gimbal with bearing retainer
US6344020B1 (en) 1997-04-11 2002-02-05 Baxter International Inc. Bearing and umbilicus gimbal with bearing retainer in blood processing system
DE19801767C1 (de) * 1998-01-19 1999-10-07 Fresenius Ag Zentrifuge
DE19803534C2 (de) * 1998-01-30 1999-11-11 Fresenius Ag Zentrifuge und Leitung zum Zuführen und/oder Abführen mindestens eines Fluids von der Separationseinheit einer Zentrifuge zu einer ortsfesten Anschlußstelle
DE19803535C2 (de) * 1998-01-30 1999-11-18 Fresenius Ag Zentrifuge und Leitung zum Zuführen und/oder Abführen mindestens eines Fluids von der Separationseinheit einer Zentrifuge zu einer ortsfesten Anschlußstelle
EP1043071A1 (fr) * 1999-04-09 2000-10-11 Jean-Denis Rochat Appareil de cetrifugation de liquide et utillisation de cet appareil
DE19944617C2 (de) * 1999-09-17 2002-01-10 Fresenius Ag Zentrifuge mit einem magnetischen Getriebe
US20020107469A1 (en) * 2000-11-03 2002-08-08 Charles Bolan Apheresis methods and devices
DE10129769A1 (de) 2001-06-20 2003-01-09 Fresenius Hemocare Gmbh Schlauchanordnung und Verfahren zu ihrer Herstellung
DE10142744C1 (de) * 2001-08-31 2003-05-22 Fresenius Hemocare Gmbh Zentrifuge
TW569442B (en) * 2001-12-18 2004-01-01 Toshiba Corp Magnetic memory device having magnetic shield layer, and manufacturing method thereof
US7479123B2 (en) 2002-03-04 2009-01-20 Therakos, Inc. Method for collecting a desired blood component and performing a photopheresis treatment
US7211037B2 (en) 2002-03-04 2007-05-01 Therakos, Inc. Apparatus for the continuous separation of biological fluids into components and method of using same
JP4422683B2 (ja) * 2003-09-11 2010-02-24 株式会社シンキー 撹拌脱泡装置
US7476209B2 (en) 2004-12-21 2009-01-13 Therakos, Inc. Method and apparatus for collecting a blood component and performing a photopheresis treatment
DE102007011332A1 (de) 2007-03-08 2008-09-11 Fresenius Hemocare Deutschland Gmbh Vorrichtung und Verfahren zum Separieren einer Zellsuspension, insbesondere zum Abtrennen mindestens einer Blutkomponente aus Vollblut
US8257239B2 (en) 2010-06-15 2012-09-04 Fenwal, Inc. Umbilicus for use in an umbilicus-driven fluid processing
US8277369B2 (en) 2010-06-15 2012-10-02 Fenwal, Inc. Bearing and bearing assembly for umbilicus of a fluid processing system
EP2731724B1 (en) * 2011-09-22 2015-01-14 Fenwal, Inc. Drive system for centrifuge
US9334927B2 (en) * 2011-09-22 2016-05-10 Fenwal, Inc. Drive system for centrifuge with planetary gear and flexible shaft
GB201116721D0 (en) * 2011-09-28 2011-11-09 Glaxo Group Ltd Novel device
EP2698208A1 (de) 2012-08-14 2014-02-19 Fresenius Kabi Deutschland GmbH Zentrifugenvorrichtung und Verfahren zum Betreiben einer Zentrifugenvorrichtung
US9383044B2 (en) 2013-02-15 2016-07-05 Fenwal, Inc. Low cost umbilicus without overmolding
CN114273096B (zh) * 2021-12-25 2024-08-23 董庆丰 医疗实验室用的低速自抽负压离心机

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US4221322A (en) * 1977-10-31 1980-09-09 Union Carbide Corporation Tube guide insert and constraint fittings for compensating rotor
US4287061A (en) * 1978-10-26 1981-09-01 National Research Development Corporation Rotating coil centrifuge
DE2967251D1 (en) * 1979-06-06 1984-11-15 Gambro Lundia Ab A device for the separation of a liquid, especially whole blood

Also Published As

Publication number Publication date
EP0109652A3 (en) 1985-10-09
DE3242541A1 (de) 1984-05-24
US4540397A (en) 1985-09-10
DE3242541C2 (zh) 1987-09-17
EP0109652A2 (de) 1984-05-30
DE3376805D1 (en) 1988-07-07
JPS59156448A (ja) 1984-09-05
ATE34676T1 (de) 1988-06-15
JPH0651133B2 (ja) 1994-07-06

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