Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Reexamination Certificate
2007-07-10
2008-11-04
Reifsnyder, David A (Department: 1797)
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
C210S223000, C210S232000, C210S407000, C210S413000, C210S437000, C210S440000, C210S441000, C210S457000
Reexamination Certificate
active
07445123
ABSTRACT:
A ceramic filter in which support rods are connected between two inner covers at the top and bottom sides of the ceramic filter core to hold a respective scraper against the periphery of the ceramic filter core, and a rotary outer cover is provided and connected to one inner cover by means of magnetic attraction such that when the rotary outer cover is rotated, the scrapers are moved against the periphery of the ceramic filter core to remove dirt from the ceramic filter core.
REFERENCES:
patent: 3202287 (1965-08-01), Szwargulski et al.
patent: 5080788 (1992-01-01), Chen
patent: 5262069 (1993-11-01), Kato
patent: 6843914 (2005-01-01), Jablonsky
David Pai Chao-Chang
Pai Patent & Trademark Law Firm
Reifsnyder David A
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