Filter cartridge for a reversible flow filter

Details Filter cartridge for a reversible flow filter Filter cartridge for a reversible flow filter

2009-01-22

2010-12-21

Lithgow, Thomas M (Department: 1797)

Liquid purification or separation

Filter

With residue removing means or agitation of liquid

C210S121000

Reexamination Certificate

active

07854328

ABSTRACT:
In order to produce a filter cartridge for a reversible flow filter for filtering a fluid which comprises a filter cartridge interior surrounded by a filtering medium, whereby the filtering medium is adapted to be cleaned in a particularly effective and uniform manner during the back flushing phase, it is proposed that the filter cartridge should comprise a reverse flow damming body which is arranged in the interior of the filter cartridge and is movable in a longitudinal direction of the filter cartridge by the reverse flow when back flushing the filter cartridge and produces a local increase in the dynamic pressure of the reverse flow, whereby the reverse flow damming body does not abut against the filtering medium when back flushing the filter cartridge.

REFERENCES:
patent: 598190 (1898-02-01), Wilcox
patent: 3542195 (1970-11-01), Soriente
patent: 3703465 (1972-11-01), Reece et al.
patent: 3754651 (1973-08-01), Lannoch
patent: 1943999 (1969-08-01), None
patent: 10244660 (2004-04-01), None
patent: 1685888 (2006-08-01), None
patent: 2007062763 (2007-06-01), None
International Searching Authority, International Search Report for PCT/EP2007/006850, Nov. 7, 2007, 6 pages.
German Office Action for Application DE 10 2006 039 508.5, Mar. 22, 2007, 4 pages.

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