Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Reexamination Certificate
2007-10-26
2010-11-30
Lithgow, Thomas M (Department: 1797)
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
C210S333100, C210S232000
Reexamination Certificate
active
07841478
ABSTRACT:
The disclosed self-cleaning filtration system and self-cleaning filter solves various problems by replacing a standard filter cartridge with an adapter screwed in place of the cartridge, a filter of limited size with a motor for rotating an inlet cover plate and an outlet cover plate over a body with a plurality of longitudinal channels inside of a circumferential filtration media where the different parts of the media are used alternately in forward and backward flow. As the cover plates rotate, each longitudinal channel comes in successive fluidic communication with either an entry opening where oil is pushed in the longitudinal channel through the filtration media and into an external cavity where filtered oil is reintroduced in the engine, or the longitudinal channel comes in fluidic communication with a drain opening where the flow through the filtration media is reversed and oil from the external cavity is pushed back into the longitudinal channel to transport stored debris into a decanter for storage, elimination, decantation and reuse. In another embodiment, instead of entry and drain openings, the oil is placed directly in contact with each longitudinal channel with the exception of the channel in fluidic communication with the drain opening. The self-filtration system includes a self-cleaning filter used in tandem with an adapter, a decanter, and a series of hoses.
REFERENCES:
patent: 2008598 (1935-07-01), Seeley
patent: 2310587 (1943-02-01), Macneill
patent: 2985306 (1961-05-01), Statzell
patent: 3739914 (1973-06-01), Moatti
patent: 4636311 (1987-01-01), Litzenburger
patent: 2889666 (2007-02-01), None
Lithgow Thomas M
Vedder Price P.C.
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