Apparatus for contamination-free transfer of a series of liquid

Details Apparatus for contamination-free transfer of a series of liquid Apparatus for contamination-free transfer of a series of liquid

1975-09-30

1976-11-09

Swisher, S. Clement

Measuring and testing

Measuring vessel

734256, G01N 114, B01L 302

Patent

active

039903125

ABSTRACT:
A valve ahead of a continuously running exhaust pump allows air to be sucked through the piping of a burette from the intake capillary and, after the capillary is lowered into the input sample vessel, a quantity of the sample liquid flushes out any remaining traces of a previous sample. After the necessary small quantity of the sample liquid has been thus pulled into and out of the burette, the valve is closed and a piston with a conical head fitting right into the burette draws in a measured quantity of the sample from the input container and then discharges it into the output container. The vertex of the piston is flattened so that the channel through the burette head will not be closed off when the piston is driven all the way into the burette head.

REFERENCES:
patent: 3273402 (1966-09-01), Farr
patent: 3827304 (1974-08-01), D'Autry
patent: 3877310 (1975-04-01), Pecsar

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