Filter with preferential fluid affinity

Details Filter with preferential fluid affinity Filter with preferential fluid affinity

2000-01-10

2002-07-23

Lithgow, Thomas M. (Department: 1724)

Liquid purification or separation

Filter

With residue removing means or agitation of liquid

C210S444000, C210S491000, C210S503000, C210S505000, C210S508000, C210SDIG009

Reexamination Certificate

active

06422395

ABSTRACT:

BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to fluid filters with extended life, including cleanable reusable filters and disposable filters.
Customers are demanding ever increased filter life, even as fluid quality declines and soot/sludge levels rise with extended service intervals, including internal combustion engine lubricating oil applications, and including other applications involving lubricant, fuel, coolant, hydraulic fluid, water, liquid and air. The present invention addresses this need and provides a simple effective solution, including both for conventional single stage filters and for combination filters having a full-flow section and a bypass section.
The invention arose during initial development efforts relating to cleanable reusable fluid filters. During continuing development efforts, it has been found that the invention also has application to disposable fluid filters.


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