Separating and filtering device

Details Separating and filtering device Separating and filtering device

1974-11-26

1976-07-20

Hart, Charles N.

Liquid purification or separation

Filter

Movable medium

210518, 210DIG23, B01D 3300

Patent

active

039705650

ABSTRACT:
A separating and filtering device for effecting sealed separation of blood into a light phase and a heavy phase within a tubular fluid sample container comprising a cup-shaped piston having a closed bottom and a permeable side wall. The piston has axially spaced first and second sealing lips adapted to sealingly engage with the inner surface of the tubular container, and the first sealing lip is deflectable to permit passage of the lighter phase past this sealing lip on movement of the cup-shaped piston downwardly, through the lighter phase, while preventing the heavier phase from such passage.

REFERENCES:
patent: 3163229 (1964-12-01), Salisbury
patent: 3508653 (1970-04-01), Coleman
patent: 3661265 (1972-05-01), Greenspan
patent: 3687296 (1972-08-01), Spinosa et al.
patent: 3814258 (1974-06-01), Ayres
patent: 3817390 (1974-06-01), Maruniak et al.
patent: 3826375 (1974-07-01), Fournier
patent: 3894952 (1975-07-01), Ayres

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