Liquid purification or separation – With repair or assembling means
Reexamination Certificate
2005-06-28
2005-06-28
Lithgow, Thomas M. (Department: 1724)
Liquid purification or separation
With repair or assembling means
C210S411000, C210S493100, C210S493500, C055S498000, C055S521000, C055SDIG005, C264S271100, C264S279000, C264SDIG004
Reexamination Certificate
active
06911144
ABSTRACT:
A filter cartridge (20) and method for making a filter cartridge (20) for removing particulates from a particulate laden fluid stream moving one direction through the filter cartridge. The filter cartridge (20) is periodically subject to cleaning fluid moving in an opposite direction to the fluid stream. The filter cartridge (20) comprises filtration media (24) formed into a tubular configuration and having a plurality of circumferentially spaced apart pleats (26). A retention device (82) to limit radial movement of the filtration media (24) when subjected to the periodical cleaning fluid and to maintain the pleats (26) in the filtration media circumferentially spaced apart when exposed up to130degrees Celsius. Preferably, the extrudate (144) is thermoplastic, polyester, elastomeric material and at least one additive may be present. Multiple layers of the extrudate (144) may be fused together.
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Product Information Dupont Hytrel Polyester Elastomer Hytrel 8238.
Carothers Charles Grant
Van Pelt Randall David
BHA Group Holdings, Inc.
Blackwell Sanders Peper Martin LLP
Elliott Kyle L.
Lithgow Thomas M.
Strugalski Greg
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