Abstract:
La presente invencion se refiere a los métodos y el aparato para procesar fluidos. El método y el aparato se caracterizan por tener un recipiente que tiene un primero y un segundo compartimiento los cuales, al girar, están en comunicacion fluida.
Abstract:
The invention concerns a method and device for separating the components of mixtures or suspensions in the centrifugal acceleration field of a centrifuge, flow-through centrifuge or ultra-centrifuge. During centrifugation, mixtures or suspensions are continuously or discontinuously fed into a centrifuge rotor system (5, 6, 12, 13) pre-filled with a fluid medium, and excess fluid and/or separated components are continuously discharged. The inflow of the mixtures or suspensions and the discharge of the separated components occur spatially separately in the region of the central axis of rotation, either via sliding sealing systems (4) or by means of processes which do not involve sliding seals. To that end, the flow direction of the incoming mixtures or suspensions is guided to a peripheral fixed point of the rotating centrifuge rotor system. Under the effect of centrifugal force, directed sedimentation of the components to be separated occurs in the fluid medium. At the same time, the components settled out in the fluid medium. At the same time, the components settled out in a directed manner are deflected in a circular manner via a deflection device in the centrifuge rotor system, which deflection device can move in a circular manner. In a final step, the separated components are deflected into the collection container in the region of the peripheral circumference of the centrifuge rotor system.
Abstract:
A centrifuge rotor comprises a base member and a cover member and has axially-disposed rotational drive connection means in a central region thereof, the base member comprising an essentially circular plate having sample tube locating means disposed radially and terminating outwardly in resilient elements, and the cover member having a lower surface which cooperates, in use, with the base to retain sample tubes securely in position, one of the base and cover members including a least one annular groove disposed radially outwardly of the sample tube locating means and the other of the base and cover members including a corresponding annular projection, the projection being sealingly engageable within the groove when the base and cover members are located together for use. The base member is provided with marked annular zones indicating ranges of packed cell volume and the cover member is transparent, whereby the packed cell volume can be assessed by unskilled personnel in developing countries by direct reading through the cover member against the annular zones, thereby enabling anaemia to be quickly and accurately diagnosed
Abstract:
Un rotor de centrifugation (5) à godets basculants possède une pluralité de chambres disposées à intervalles réguliers autour de son axe vertical (12). Chaque chambre comprend une cavité (16) qui s'étend entièrement dans la tête du rotor. Une fente (24) au fond de la tête du rotor (5) s'étend radialement de la cavité (16) à la périphérie de la tête du rotor (5). La surface supérieure de la fente (24) est conçue pour recevoir un godet (25) lorsqu'elle se trouve en position horizontale. Egalement dans la cavité (16) on prévoit une paire de rainures opposées (18) s'étendant de haut en bas sur une partie de la paroi de la cavité. Les extrémités des rainures (18) forment un rebord dans la cavité pour soutenir les extrémités (36a, 36b) de la tige de suspension (34), ce qui permet au godet (25) de pivoter vers le haut sous l'action de la force centrifuge pour venir se loger dans la fente (24) de la tête du rotor. Des godets ayant une partie tubulaire (28) fermée à une extrémité et munis d'une structure à bride adjacente à l'autre extrémité sont aussi prévus. A la jonction de la cavité et de la fente de la tête du rotor, un épaulement (22) est adapté pour être en contact avec la structure à bride du godet (25) lorsque celui-ci se trouve à l'horizontale, en transférant ainsi le support du godet de la tige de suspension (34) à la tête du rotor (5).
Abstract:
A rotor assembly for use in a centrifuge is provided including a rotor body (12) having a plurality of apertures (29) for holding fluid containers. An impervious cover (60) fits tightly on the rotor body to provide a seal for the rotor to prevent the escape of any sample from the rotor. Further, a mechanical connection system permits the rotor to be connected to and disconnected from a drive motor while the cover is sealing the rotor.
Abstract:
The present invention is directed to a floating cap or spacer (18) and centrifuge tube assembly (16) which provide adequate resistance to the deforming forces exerted on it. The exterior wall of the tube stem (24) is provided with an annular ridge (34) and the support spacer (18) is provided with an annular groove (36) which mates with the ridge (34) on the tube stem (24) to form an interlocking coupling.
Abstract:
A centrifuge adapter is formed in two sections (12, 14) divided by a plane that preferably extends through the longitudinal axis of the adapter. The two sections may be substantially identical in a first embodiment, each including a generally semicylindrical portion having a trough (20) therein and further including an end portion (18). In a second embodiment, the adapter may comprise a first section (42) including the entire bottom end portion for supporting the bottom of a centrifuge tube. The second section (44) is formed generally as a semicylinder or a cylinder. When the first and second portions are assembled in facing relationship the troughs (20, 22) form a cavity for receiving a centrifuge tube therein. The sections of the adapter may be separate pieces, or they may hingedly connected along a pair of adjacent edges. The sections may be connected by projections (36) extending from one section into corresponding cavities (30) in the other section. The sections are easily separated after the sample has been centrifuged to remove the centrifuge sample tube from the adapter.
Abstract:
Centrifugal batch separation of blood in a closed collapsible container (10) is carried out by placing the container in a rigid casing (20) in which the container is divided into two or more sections (10A, 10B, 10C) in that the casing constricts the container at one or more predetermined positions between the ends of the container. The casing with the container therein is then centrifuged, a gap-like passage between the container sections permitting rearrangement of the contents of the container so that each section will accommodate a blood fraction. After the centrifugation the fractions are isolated from each other. The volume of the cavity within the casing accommodating the radially outermost container section is matched with the hematocrit and the total blood volume by means of filler bodies (26).
Abstract:
A centrifuge rotor is fabricated of a stacked plurality of tiers where each tier is formed from a stacked array of wound arms. Each arm is formed from an array of layered turns of anisotropic fibers having parallel side portions connected through curved end turn portions.
Abstract:
A centrifuge rotor with a central hub (12) is characterized by a flexible carrier (38) formed from a plurality of fibers arranged in a predetermined textile structure. The carrier has a socket (48) formed at the radially outer end thereof by the interconnection of the fibers. The socket may receive a vessel (50) therein. A restoring cap assembly responds to centrifugal force to displace from its initial to final positions. As it returns, the cap acts against the flexible carrier (38) to assist the same to the first position.