Dual centrifuge and sample container

Chemistry: physical processes

Patent

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Details

B04B 504, B04B 1106

Patent

active

040157741

ABSTRACT:
A centrifuge apparatus for separating whole blood into its serum and cell components. The device consists of a small centrifuge cup having a movable bottom wall formed by an upwardly movable piston. The cup is surrounded by a three-tiered ring-shaped container with the two upper tiers each containing a plurality of pockets. The centrifuge cup is spun at a high speed and the whole blood sample in the cup is separated, with excess sample expelled into the lowest tier. The multi-pocketed container is also spun as a centrifuge coaxially with the cup but at a lower speed. The bottom wall piston of the cup and the container are movable vertically relative to the cup by respective cams operated by a common timer-controlled motor. The container moves downwardy and the piston moves upwardly so that when the first multi-pocketed tier is adjacent the top of the cup, the piston is in a position to force the serum component out of the cup and into the tier pockets at this level; when the container moves further downwardly to bring the second multi-pocketed tier adjacent the top of the cup, the piston is in a position to expel the cell components into the pockets at this level.

REFERENCES:
patent: 1566770 (1925-12-01), Packer
patent: 2822127 (1958-02-01), Sinn
patent: 3133881 (1964-05-01), Childs
patent: 3439871 (1969-04-01), Unger
patent: 3880592 (1975-04-01), Kelley et al.

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