Filter apparatus

Liquid purification or separation – Diverse distinct separators – Including a filter

Reexamination Certificate

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Details

C210S304000, C210S351000, C210S414000, C210S415000, C210S416100, C210S497100, C210S512300

Reexamination Certificate

active

07993519

ABSTRACT:
A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element. The disclosed filter element is a continuous resilient, cylindrical, helical filter coil including a regular sinusoidal shape defining loop-shaped filter pores between adjacent coils.

REFERENCES:
patent: 823527 (1906-06-01), Hardie
patent: 1036123 (1912-08-01), Kiefer
patent: 3892173 (1975-07-01), Hall et al.
patent: 4173527 (1979-11-01), Heffley et al.
patent: 4193865 (1980-03-01), Aario
patent: 4309284 (1982-01-01), Morimoto et al.
patent: 4446788 (1984-05-01), Molnar
patent: 5229014 (1993-07-01), Collins
patent: 7182921 (2007-02-01), Miura et al.
patent: 7513372 (2009-04-01), Carew
patent: 7674377 (2010-03-01), Carew
patent: 2007/0124997 (2007-06-01), Liu et al.
patent: 2008/0290018 (2008-11-01), Carew
patent: 945614 (1964-01-01), None
patent: 2008030805 (2008-03-01), None
PCT International Search Report, International Application No. PCT/US2009/066415; International Filing Date Dec. 2, 2009, mailed Jan. 28, 2010.

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