Multi-layer filter dust bag for a vacuum cleaner

Details Multi-layer filter dust bag for a vacuum cleaner Multi-layer filter dust bag for a vacuum cleaner

1976-10-27

1978-09-26

Nozick, Bernard

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

55369, 55376, 55380, 55382, 55473, 55524, 55487, 55527, B01D 4600

Patent

active

041166485

ABSTRACT:
A vacuum cleaner dust bag that is constructed to substantially increase the filtering action of the bag and therefore is particularly adaptable for use in vacuum cleaners utilized in hospitals, nursing homes, and other health care facilities. The filter dust bag is constituted of two concentric sections or compartments with the space of one of the compartments having a dry filter mat material that effectively traps all dust and dirt particles down to minute particles of about 0.3 microns. The tube on the filter dust bag which connects to the discharge outlet of the vacuum cleaner is constructed of an air-impervious material, while the outer and inner layers of the filter are fabricated of air-pervious material of different elasticity.

REFERENCES:
patent: 754053 (1904-03-01), Derham
patent: 1821824 (1931-09-01), Woodward
patent: 2188428 (1940-01-01), Evans
patent: 2780828 (1957-02-01), Brace
patent: 2964127 (1960-12-01), Kern
patent: 3322041 (1967-05-01), Fesco
patent: 3364663 (1968-01-01), Lagerstrom
patent: 3596441 (1971-08-01), Lundahl
patent: 3710948 (1973-01-01), Sexton
patent: 3859064 (1975-01-01), Cordell
patent: 3972694 (1976-08-01), Head

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