Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1982-02-09
1984-02-07
Spear, Jr., Frank A.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
2104161, 2104332, 210445, B01D 3100
Patent
active
044302134
ABSTRACT:
An ultrafiltration unit for the separation of the colloidal or very fine solid material by filtration through microporous or semipermeable mediums. The unit comprises a filter housing formed by an upper part and a lower part airtightly connected together and a filter internally disposed in the housing. The upper part of the housing has an inlet pipe at its top and a check valve is provided in the inlet pipe. A liquid sample is forced in the upper part of the housing together with air through the inlet pipe, pressed by the pressure of the air and then filtered. An escaping of the air can be blocked by the check valve provided in the inlet pipe of the upper part of the housing.
REFERENCES:
patent: 2566354 (1951-09-01), Morey
patent: 3389801 (1968-06-01), Sieger
patent: 3406828 (1968-10-01), Boston
patent: 3421628 (1969-01-01), Barnabe et al.
patent: 3705100 (1972-12-01), Blatt et al.
patent: 3795088 (1974-03-01), Esmond
patent: 3935111 (1976-01-01), Bentley
Catalogue by Japan Millipore Ltd.
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