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Title:
FREEZE RESISTANT WATER FILTER
Document Type and Number:
WIPO Patent Application WO2004045737
Kind Code:
A3
Abstract:
A freeze resistant filter cartridge assembly, includes a filter cartridge including a filter housing and a filter media and having at least one component selected from a list of components consisting of: the filter housing being formed of an increased elasticity polyolefin polymer having elongation and glass transition properties that allow for stretching of the housing during a freezing event rather than rupturing; a sleeve having a volume of air entrapped therein within and being disposed in the interior of the filter cartridge; and the filter housing formed of a conventional polyolefin having a wall thickness great enough to resist freeze induced expansion stresses. A method of forming a freeze resistant filter cartridge assembly is further included.

Inventors:
FRITZE KARL
Application Number:
PCT/US2003/036970
Publication Date:
April 21, 2005
Filing Date:
November 19, 2003
Export Citation:
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Assignee:
CUNO INC (US)
International Classes:
B01D35/30; B29C39/00; (IPC1-7): B29C39/00
Foreign References:
US5462675A1995-10-31
US5282966A1994-02-01
US4540489A1985-09-10
US5273649A1993-12-28
US5256285A1993-10-26
US6468435B12002-10-22
US5989424A1999-11-23
US6428700B12002-08-06
US6296765B12001-10-02
Other References:
See also references of EP 1575750A4
Download PDF:
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