Dual-element filter cartridge for air intake filters designed fo

Details Dual-element filter cartridge for air intake filters designed fo Dual-element filter cartridge for air intake filters designed fo

1985-09-13

1986-10-28

Spitzer, Robert

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

55498, 55521, B01D 4652

Patent

active

046196749

ABSTRACT:
A dual-element disposable filter cartridge for air intake filters of machines operating in a dusty environment, the filter cartridge having a second pleated filter element arranged concentrically inside a first pleated filter element, the filtering paper of the second filter element, in comparison to the filtering paper of the first filter element, having a fractional effective surface area, a lesser density and a heavier gauge with wider and longer flow passages or pores which, due to the higher air flow speed therethrough, trap dust particles which, in the new state of the filter cartridge, pass through the outer filter element.

REFERENCES:
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patent: 3262564 (1966-07-01), Pall et al.
patent: 3283902 (1966-11-01), Farris et al.
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patent: 3370708 (1968-02-01), Hultgren et al.
patent: 3397793 (1968-08-01), MacDonnell
patent: 3420377 (1969-01-01), Vandersip
patent: 3488928 (1970-01-01), Tarala
patent: 3672130 (1972-06-01), Sullivan et al.
patent: 4304580 (1981-12-01), Gehl et al.
patent: 4314832 (1982-02-01), Fox

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