B - Operations – Transporting – 04 – B
Patent
B - Operations, Transporting
04
B
233/1
B04B 5/00 (2006.01) B04B 5/04 (2006.01)
Patent
CA 1159803
CENTRIFUGE ASSEMBLY ABSTRACT An improved centrifuge assembly comprising a channeled rotor assem- bly and a fluid container disposed in the channel, whereby the centri- fugal separation effects in the fluid container are determined by the geometry of the channel in the rotor. This arrangement is particularly useful for two-stage blood platelet separation. The fluid container is preferably formed from semirigid plastic material and is considered a disposable item to be discarded after a single use. The rotor assembly preferably includes a removable filler piece or center piece formed from a single piece of material, such as rigid plastic, as by machining or molding, and having therein an open-topped channel having dimensions appropriate to receive the semirigid container, which is suitably curved and placed in the channel. Fluid connections are provided from a multi- chambered cavity attached to the ends of the container to an axially located multi-channel rotating seal. The connections lie in a plurality of radial slots in the filler piece. The channel is divided into two distinct portions, the first portion of the channel being circular, and the second portion being spiral-like and having a plurality of radiuses, each measured from a different center, the spiral increasing radially outward from its juncture of the first stage and the second stage. A transition section connects the two portions, and forms a spillway be- tween the two portions. The channels are proportioned and arrayed so that the centrifuged red cells move toward the outer wall of the first portion, from whence they retroflow to an entry chamber and thence to a fluid connection by which the red cells are drawn off. EN9-78-009
326115
International Business Machines Corporation
Kerr Alexander
LandOfFree
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