Filter and installation means for dry material filter for electr

Details Filter and installation means for dry material filter for electr Filter and installation means for dry material filter for electr

1989-01-12

1990-03-06

Woo, Jay H.

Gas separation

Flexible or collapsible bag type

With securing or supporting means

55380, 55381, 55486, 55498, 493186, 493941, B01D 4602, B31B 4904

Patent

active

049062654

ABSTRACT:
For installing a dry material paper filter on the filter cage of an electric vacuum cleaner, a disk of porous paper filtering material or of cloth type fabric is laid over the panel enclosing the bottom of the filter cage and a ring is pressed up over the paper or cloth filter and over the panel. As the ring is drawn up over the filter cage, it folds and presses the paper or cloth filter around the filter cage. At the top of the filter cage, the ring secures the filter to the cage. An additional filtering sleeve may be disposed around the filter cage before the filter is installed over the cage and over the sleeve with the attachment ring. The sleeve may be of foam or other wet material filtering material. The filter installed with the ring is of dry filtering material, like paper or cloth. A marking or disk at the center of the filter helps a user place the filter over the filter cage before the ring is used to fold the filter into place.

REFERENCES:
patent: 90107 (1869-05-01), Kimball
patent: 945205 (1910-01-01), Webb
patent: 2863524 (1958-12-01), Buda
patent: 2975863 (1961-03-01), Sosnowich
patent: 3365864 (1968-01-01), Iizima
patent: 3538686 (1970-11-01), Schwab
patent: 3775951 (1973-12-01), Eicholz et al.
patent: 3856489 (1974-12-01), Vokral
patent: 4118208 (1978-10-01), Klinedinst
patent: 4185974 (1980-01-01), Hiester
patent: 4304579 (1981-12-01), Granville et al.
patent: 4508550 (1985-04-01), Berfield et al.
patent: 4609387 (1986-09-01), Berfield et al.
patent: 4623366 (1986-11-01), Berfield et al.

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