Measuring and testing – Sampler – sample handling – etc. – With constituent separation
Patent
1980-07-31
1982-08-31
Yasich, Daniel M.
Measuring and testing
Sampler, sample handling, etc.
With constituent separation
7386424, 422 82, 422101, G01N 114
Patent
active
043466087
ABSTRACT:
A float device is provided for density gradient fractionation which permits continuous removal of liquid samples from the surface of the liquid within a tube. The float device floats on the liquid surface and is provided with a centrally disposed length of tubing which extends through the device to provide communication between the liquid surface and a suction source such as a peristaltic pump. A concavity in the bottom of the float assists in removing trapped air and minimizes turbulent flow, thereby assuring high resolution of obtained samples.
REFERENCES:
patent: 3586064 (1971-06-01), Brown
patent: 3590889 (1971-07-01), Vannus
patent: 3827304 (1974-08-01), D'Autry
patent: 3957654 (1976-05-01), Ayres
patent: 4037464 (1977-07-01), Wenander
patent: 4197735 (1980-04-01), Munzer et al.
patent: 4203840 (1980-05-01), Stoeppler et al.
patent: 4279863 (1981-07-01), Friehler
Publ. "A Simple Apparatus for Retrieving Density Gradients by Surface Tenn", Glen S. Germain, Analytical Biochemistry, 1974, (pp. 89-92).
Lorenz Patrick E.
Olenick John G.
Bellamy Werten F. W.
Gapcynski William G.
Petruncio John M.
The United States of America as represented by the Secretary of
Yasich Daniel M.
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