Filter element with coating for surface filtration

Liquid purification or separation – Processes – Separating

Reexamination Certificate

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Details

C210S791000, C210S167020, C210S108000, C210S496000, C210S504000, C210S506000, C210S510100, C055S524000, C096S290000

Reexamination Certificate

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08052878

ABSTRACT:
A method for filtering out foreign particles from a cooling lubricant used in a process of machining a workpiece includes providing an inherently stable, flow-porous filter element. The filter element comprises a porous main body made of joined plastics particles and having an afflux surface and a porous coating on the afflux surface for surface filtration. The porous coating first component particles and/or fibres, second component anti-adhesion particles to mitigate the adhesion of filtered out material to the porous coating and to facilitate cleaning of the filter element, with the first component particles and/or fibres and the second component particles being mixed in the porous coating, a solidified inorganic binder, and a set adhesive. The solidified inorganic binder and the set adhesive bind the first component particles and/or fibres and the second component particles to each other and to the porous main body. The cooling lubricant is first passed through the porous coating and thereafter through the porous main body of the filter element.

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International Search Report dated Oct. 5, 2006.
International Preliminary Report on Patentability dated Oct. 11, 2007 with an English Translation.

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