Rotor drive assembly for a centrifugal liquid processing apparat

Details Rotor drive assembly for a centrifugal liquid processing apparat Rotor drive assembly for a centrifugal liquid processing apparat

1977-11-11

1979-01-02

Krizmanich, George H.

Chemistry: physical processes

74722, 74665GE, B04B 908

Patent

active

041323491

ABSTRACT:
The rotor drive assembly is utilized in driving a rotor assembly in an apparatus for centrifugal liquid processing of whole blood wherein whole blood is withdrawn from a donor, passed into a bowl held by the rotor assembly and the blood is centrifuged to separate the same into at least three components within the bowl. One component which is to be collected is withdrawn at a fixed rate of volumetric displacement while the other two components are withdrawn at variable rates of volumetric displacement. The other two components are recombined and returned to the donor. The withdrawal of the one component is optically monitored to determine whether or not either one of the other components is being mixed with the one component. The rotor drive assembly includes a unitary vertical drive shaft having a lower rotatable collar, an intermediate fixed collar and an upper rotatable collar mounted thereon. Two idler pulleys depend from the fixed collar and an idler shaft is rotatably journaled in the fixed collar and has upper and lower pulleys. The lower pulley, the idler pulley and the first collar form planetary drive means driven by a first continuous belt. A second continuous belt engages the upper pulley and the third collar. Also, passage means extend from the center of the upper portion of the drive shaft downwardly and then outwardly through the fixed collar for passing flexible, blood component carrying tubings to the bowl.

REFERENCES:
patent: 2559299 (1951-07-01), Helling
patent: 3115795 (1963-12-01), Morin
patent: 3986442 (1976-10-01), Khoja et al.

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