Serum skimmer and filter separation unit

Details Serum skimmer and filter separation unit Serum skimmer and filter separation unit

1973-12-04

1976-05-04

Spear, Jr., Frank A.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

210359, 210DIG23, B01D 3502

Patent

active

039546144

ABSTRACT:
A plunger assembly is longitudinally movable within an outer tube having a lower closed end. The plunger assembly includes a plunger tube and a resilient piston-valve plug seated in the inner end thereof. The piston-valve plug has frictional sealing engagement with the inner walls of the outer tube, has a slit therethrough for permitting the flow of clear liquid from the lower end of the outer tube into the plunger tube when the plunger tube is moved inwardly of the outer tube, and has a port therethrough for permitting the return flow of air into the space in the outer tube below the plug when the plunger tube is moved outwardly of the outer tube. A filter element is seated in the plug to filter liquid prior to flow through the slit.

REFERENCES:
patent: 3661265 (1972-05-01), Greenspan
patent: 3664774 (1972-05-01), Tupper et al.
patent: 3693804 (1972-09-01), Grover
patent: 3779383 (1973-12-01), Ayres
patent: 3814248 (1974-06-01), Lawhead
patent: 3832141 (1974-08-01), Haldopoulos
patent: 3846077 (1974-11-01), Ohringer

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