Filter element and filter device having replaceable filter

Details Filter element and filter device having replaceable filter Filter element and filter device having replaceable filter

2006-08-08

2006-08-08

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

With repair or assembling means

C210S315000, C210S323200, C210S338000, C210S342000, C210S493200, C210S497010

Reexamination Certificate

active

07087166

ABSTRACT:
Providing a filter device with various functions, such as remarkable improvement of the throughput of the downstream filter, ion-removing property of the upstream filter. A filter element comprises an upstream filter and a downstream filter made of the same or different material and installed into one housing or container, wherein said downstream filter is fixed to said housing, said upstream filter is fixed to said downstream filter, both filters are concentrically arranged to each other, and when the downstream filter is not contaminated, only the upstream filter can be replaced with fresh one.

REFERENCES:
patent: 3262570 (1966-07-01), Gailitis et al.
patent: 3334752 (1967-08-01), Matravers
patent: 3552553 (1971-01-01), Reading
patent: 5980759 (1999-11-01), Proulx et al.
patent: 534851 (1955-01-01), None
patent: 7-213814 (1995-08-01), None
patent: 7-323217 (1995-12-01), None
patent: 407323217 (1995-12-01), None
International Search Report for PCT/US02/30495, mailed Jan. 3, 2003.

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