Industrial vacuum cleaner

Claim 1

In a vacuum cleaner comprising a closed upper end upper tank portion, suction-producing means connected thereto, a removable closed lower end lower tank portion, means for bringing the lower tank portion into sealing contact at its upper end with the lower end of the upper tank portion and for moving it away therefrom, an air inlet and means for holding an inverted dust bag filter in the upper tank portion with the open end of the bag downward, the improvement comprising an interior ledge surrounded by the upper tank portion intermediate its upper and lower ends, a frame adapted to fit and positioned against the upper surface of the ledge and to seal against that ledge, the frame projecting above that ledge, means to attach the open end of a dust bag to the upright projecting frame portion, a deflector skirt adapted to fit and positioned against a lower surface of the ledge, the skirt projecting below the ledge to the lower end of the upper tank portion and spaced from the upper tank portion wall, the air inlet being positioned in the upper tank portion wall between its lower end and the interior ledge and opening into the lower tank portion in the space between the upper tank portion wall and the deflector skirt, whereby air may flow from the air inlet into the deflector skirt, and a plurality of means detachably connecting the deflector skirt to the frame operable from inside the deflector skirt.