Measuring and testing – Measuring vessel
Patent
1975-06-23
1976-09-28
Swisher, S. Clement
Measuring and testing
Measuring vessel
B01L 302
Patent
active
039824381
ABSTRACT:
A Multiple Sample Pipetting Device is disclosed which is adapted to remove small predetermined volumes of liquid from a plurality of sample wells arranged in a compact rectilinear array, or conversely to transfer small predetermined volumes of liquid from one large reservoir container to a plurality of sample wells arranged in the same array. The apparatus has a plurality of small tubes extending downwardly with the upper end portion communicating with reservoirs that have a predetermined volume. A flexible diaphragm extends across all of the reservoirs, and the upper ends thereof are in communication with a common manifold chamber. The application of positive or negative pressure moves the diaphragm downwardly and upwardly into contact with the lower and upper reservoir walls, respectively, and either extracts or expels liquid from the tubes. The manifold and tube holding portion of the apparatus is vertically movable so that the tubes can be lowered into the appropriate container to extract the predetermined volume of liquid material.
REFERENCES:
patent: 3302462 (1967-02-01), Pursell
patent: 3568735 (1971-03-01), Lancaster
patent: 3572552 (1971-03-01), Guinn
patent: 3807235 (1974-04-01), Lefkovitz
Swisher S. Clement
The Salk Institute for Biological Studies
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