Liquid filtering device

Details Liquid filtering device Liquid filtering device

1989-03-10

1990-10-16

Jones, W. Gary

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

210435, 210456, 210491, 210492, B01D 2956

Patent

active

049632604

ABSTRACT:
A liquid filtering device for separating leukocytes from blood to produce concentrated red cells, for example, includes a housing having a liquid inlet port and a liquid outlet port and providing a flow passage from the liquid inlet port to the liquid outlet port, a partition plate fixedly disposed in the housing, a first filter element disposed in the housing in an upstream position with respect to the flow passage, and a second filter element disposed in the housing in a downstream position with respect to the flow passage, the second filter element being made of a material having a larger filtration resistance than the first filter element. The second filter element has an outer peripheral edge fixed directly to the partition plate in a liquidtight manner in surrounding relation to the first filter element.

REFERENCES:
patent: 4009714 (1977-03-01), Hammer
patent: 4422939 (1983-12-01), Sharp et al.
patent: 4701267 (1987-10-01), Watanabe et al.

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