| 摘要 |
A rotor having variable volumes adapted for collecting and centrifuging biological fluids. The rotor includes an impermeable flexible body having a cylindrical shape with stretchable vertical walls and semi pliant base. The rotor includes a rigid circular member that is seamlessly joined to the top of the flexible body. The rigid cover defines an opening having a rotary seal that maintains a closed system inside a spinning rotor. The rotary seal permits a plurality of non-rotating conduits to pass through for controlling the flow in and out of the rotor while it is spinning. In a preferred embodiment, the rotor includes a Core to stabilize the rotating fluids inside the separation chamber, and/or includes a diverter to divert the fluid entering the rotor to the periphery of the separation chamber for better processing. When the rotor is inserted in the centrifuge, the rigid cover is fixed at the top of the centrifuge bucket. The base of the flexible body is firmly secured to the chuck by vacuum or mechanical interlock means. The chuck moves vertically down and up by pneumatics or electrical motor means embedded in the rotating centrifuge, while it is spinning. The base of the rotor moves vertically in conjunction with the chuck increasing or decreasing the volume of the processing chamber as the sidewall of the flexible body stretches or contracts. In another preferred embodiment the base of the flexible body is secured to the chuck by centrifugal means.
|
