Circumferentially driven continuous flow centrifuge
View Patent ↗A centrifuge ( 10 ) including a first rotatable mechanism ( 60 ) having a rotation axis with a fluid retentive housing ( 20 ) being coaxially mounted on the first rotatable mechanism for co-rotation therewith; a second rotatable mechanism ( 90 ) having a rotation axis with the first and second rotatable mechanisms being coaxially interconnected for co-rotation around a common axis; and fluid tubing ( 70 ) connected to the axis of the fluid retentive housing and having a distal length that extends axially outwardly from the fluid retentive housing. A support arm ( 50 ) is mounted to the second rotatable mechanism a support tube ( 80 ) receives therethrough at least a part of the distal length of the fluid tubing and a bearing member ( 82 ) rotatably supports the support tube in the support arm whereby upon rotation of the first and second rotatable mechanisms the fluid tubing is free to one of rotate with and rotate relative to the support tube.
1. A multi-lumen rope assembly for a centrifuge apparatus comprising:
a plurality of elongated tubes for delivering one or more fluids between a first fluid retaining mechanism and a fluid receiving rotatably driven rotor of the centrifuge apparatus, one end of the rope adaptable to be attached to the center of the driven rotor;
the other end of the rope adaptable to be attached to the first fluid retaining mechanism, the first fluid retaining mechanism being mounted on an opposing side of the rotor and such that the point of attachment of the other end of the rope is substantially coaxial with an axis of the rotor,
a support arm rotatable with the rotor, wherein the support arm extends generally parallel to the rotation axis and is laterally offset from the rotation axis, wherein the support arm includes a curved input guide member secured to one end of said support arm and a curved output guide member secured to the other end of said support arm to guide the plurality of elongated tubes;
a support tube for receiving therethrough at least part of the distal length of the elongated tubes; and
a bearing member for rotatably supporting said support tube in said support arm.
2. The multi-lumen rope assembly as set forth in claim 1 , wherein said support arm has a channel for receiving said support tube and opposite recesses for receiving a pair of bearings that comprise said bearing member.
3. The multi-lumen rope assembly as set forth in claim 1 , wherein said support arm extends to either side of first and second rotatable mechanisms.
4. The multi-lumen rope assembly as set forth in claim 1 , wherein said support arm includes a longitudinal channel for receiving said support tube.
5. The multi-lumen rope assembly as set forth in claim 4 , wherein said support arm also includes oppositely disposed recesses for receiving said bearing member.
6. The multi-lumen rope assembly as set forth in claim 5 , wherein said bearing member comprises a pair of oppositely disposed bearings received in said recesses of said support arm and for supporting opposite ends of said support tube.
7. The multi-lumen rope assembly as set forth in claim 1 , wherein said guide members are smooth, polytetrafluoroethylene hardcoated, aluminum members.
8. The multi-lumen rope assembly as set forth in claim 7 , wherein said guide members have a coefficient of friction not more than about 0.2.
9. The multi-lumen rope assembly as set forth in claim 1 , wherein the elongated tubes comprises a high durometer urethane tubing.