Filter device for separating blood fractions

Details Filter device for separating blood fractions Filter device for separating blood fractions

1975-03-25

1977-05-03

Spear, Jr., Frank A.

Liquid purification or separation

Filter

Movable medium

210DIG23, B01D 3300

Patent

active

040213528

ABSTRACT:
The invention relates to a filter device for separating blood fractions into a specifically heavier non-filtratable and a specifically lighter filtratable fraction, characterized by a piston of a soft resilient material, preferably a thermoplastic material, associated with a cylindrical vessel and adapted for airtight sliding movement therein, said piston containing a filter permeable for the specifically lighter fraction but impermeable for the specifically heavier fraction and having at the top side a constricted neck with a flaring upper opening.

REFERENCES:
patent: 3481477 (1969-12-01), Farr
patent: 3511239 (1970-03-01), Tuschhoff
patent: 3647070 (1972-03-01), Adler
patent: 3661265 (1972-05-01), Greenspan
patent: 3782548 (1974-01-01), Bowen
patent: 3814258 (1974-06-01), Ayres
patent: 3865731 (1975-02-01), Seitz
patent: 3873449 (1975-03-01), Connelly et al.
patent: 3879295 (1975-04-01), Glover et al.
patent: 3932277 (1976-01-01), McDermott et al.
patent: 3955423 (1976-05-01), Ohringer
patent: 3962085 (1976-06-01), Liston et al.
patent: 3970565 (1976-07-01), Ahlstrand et al

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