Filter cartridge

Details Filter cartridge Filter cartridge

2002-07-03

2011-11-22

Nguyen, Nam X (Department: 1778)

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

C210S167010, C210S167020, C210S435000, C210S438000, C210S439000, C210S451000, C210S455000, C210S457000, C210S484000, C210S497010

Reexamination Certificate

active

08061529

ABSTRACT:
A filter cartridge (10), in this case comprising an injection moulded cylindrical plastics body (11) having spaced anti-tracking ribs (12) which are disposed unevenly along the inner surface (13) of the hollow body (11). First and second paper rolls as filter elements (14and15) have been pushed under compression into the hollow body (11) and are separated by spacer means (16) located centrally within the hollow body (11). Spacer means (16) is made from two separate spacers (18) which are generally made in the form of a spoked wheel type arrangement. Each spacer (18) comprises an outer ring (19) and an inner ring (20), the inner ring (20) has four apertures or recesses (21) on its top and offset by 45 degrees equally on its opposite side are four more equally spaced apertures (21) making a total of eight, the apertures provide flow through passages (21) through the inner ring (20), plastic connector portions (22) extend radially between the rings (19and20).

REFERENCES:
patent: 4115277 (1978-09-01), Swank
patent: 4366057 (1982-12-01), Bridges et al.
patent: 4773990 (1988-09-01), Hood, Jr.
patent: 4792397 (1988-12-01), Rasmussen
patent: 4876007 (1989-10-01), Naruo et al.
patent: 5486290 (1996-01-01), McGinness et al.
patent: 6319416 (2001-11-01), Morgan et al.
patent: 7066338 (2006-06-01), Winter et al.
patent: 12391/95 (1995-05-01), None
patent: 0556506 (1993-08-01), None
patent: WO 00/37232 (2000-06-01), None

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