Air filter assembly

Details Air filter assembly Air filter assembly

1979-10-19

1982-04-06

Lacey, David L.

Gas separation

Means within gas stream for conducting concentrate to collector

55155, 55156, 55486, 55489, 55521, 55DIG39, B03C 902, B01D 5000

Patent

active

043233740

ABSTRACT:
An air filter assembly including an electret filter sheet of material which exhibits electrical charges of opposite sign on opposite faces thereof and a non-electret conventional filter sheet of material combined with and disposed upstream from the electret filter sheet of material, whereby particles of a large diameter are collected by the non-electret filter sheet of material and particles of a small diameter are collected by the electret filter sheet of material without causing clogging or air pressure loss.

REFERENCES:
patent: 2931748 (1960-04-01), Muller
patent: 2973830 (1961-03-01), Gruner
patent: 3073094 (1963-01-01), Landgraf et al.
patent: 3117849 (1964-01-01), Selke
patent: 3242649 (1966-03-01), Rivers
patent: 3307332 (1967-03-01), Grace et al.
patent: 4011067 (1977-03-01), Carey, Jr.
patent: 4215682 (1980-08-01), Kubik et al.

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