Serum-plasma separator and transfer apparatus

Details Serum-plasma separator and transfer apparatus Serum-plasma separator and transfer apparatus

1976-10-01

1979-03-06

Lutter, Frank W.

Chemistry: physical processes

23230B, 128 2F, 128272, 210131, 210514, 210516, 422100, 422101, B04B 1508

Patent

active

041426681

ABSTRACT:
Serum-Plasma separator and transfer apparatus comprising a tube and a hollow stopper-like member fitted into the open end of the tube. The top end of the stopper is of a flexible material with a weight positioned thereon. A rigid capillary tube with one end in the hollow stopper and the other end joined with a flexible capillary tube which, in turn, has its other end attached to a weighted filter. The capillary tube has a port in its side wall at the lower end adjacent the filter. As the serum is centrifuged the weighted filter drops into the tube causing the sample liquid to pass through the filter into the upper portion of the tube. At the same time the weight of the filter forces the flexible capillary tube to extend downwardly thereby opening the port in the capillary tube into the liquid sample. As the centrifuging action slows down, the weight on the stopper tend to return to its normal position. In this way a sucking action forces the liquid through the port into the capillary tube and then into the hollow stopper. The serum is then transferred without exposure.

REFERENCES:
patent: 3355098 (1967-11-01), Farr
patent: 3392834 (1968-07-01), Christensen
patent: 3465957 (1969-09-01), Brandt
patent: 3468474 (1969-09-01), Shoblom et al.
patent: 3481477 (1969-12-01), Farr
patent: 3586064 (1971-06-01), Brown et al.
patent: 3630191 (1971-12-01), Gifford
patent: 3661265 (1972-05-01), Greenspan
patent: 3761408 (1973-09-01), Lee
patent: 3799342 (1974-03-01), Greenspan

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