Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1974-12-23
1976-06-08
Hart, Charles N.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
232585R, 23259, 128 2F, 128DIG5, 210359, 210DIG23, B01D 3300
Patent
active
039620859
ABSTRACT:
There is disclosed a plunger and filter assembly for insertion into the end of a collector cylinder whereby the cylinder with the assembly may be inserted into a vial to skim off the fluid contents therein. A plunger member has a cylindrical shape and a central opening therethrough, one end of the plunger having a smaller diameter than the other end thereof for insertion into one end of a collector cylinder. The other end of the plunger member has a diameter larger than the collector cylinder to engage and seal the plunger member with the interior wall of a vial into which the collector cylinder with the plunger member installed therein may be inserted. A circular disc valve having a diameter substantially the same as the one end of the plunger member is movably mounted on the one end such that when inserted into the vial, the uppermost contents of the vial are passed through the central opening of the plunger and between the one end of the plunger and the disc valve into the cylinder and when the cylinder with the plunger and valve assembly are removed from the vial, the disc valve closes the one end of the plunger to retain the contents passed therethrough thereby skimming the uppermost contents of the vial passed therethrough. The other end of the plunger is adapted to receive a filter disc whereby the skimmed contents of the vial are filtered.
In another embodiment the disc valve is omitted and the collector cylinder has openings in the side thereof and a receptacle above the openings whereby the contents of the vial are passed through the disc filter and the central opening of the plunger, through the side openings in the collector cylinder and between the walls of the vial and the collector cylinder into the receptacle.
REFERENCES:
patent: 3013557 (1961-12-01), Pallotta
patent: 3659749 (1972-05-01), Schwartz
patent: 3661265 (1972-05-01), Greenspan
patent: 3699961 (1972-10-01), Szpur
patent: 3832141 (1974-08-01), Haldopoulos
patent: 3846077 (1974-11-01), Ohringer
patent: 3865731 (1971-02-01), Seitz
patent: 3870639 (1975-03-01), Moore et al.
patent: 3873449 (1975-03-01), Connelly et al.
Frison Gerald Paul
Liston Max Davis
Abbott Laboratories
Hart Charles N.
Madsen Raymond L.
Mukai Robert G.
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