Patent ID: 8099828
Filing Date: 2012-01-24
Classification: A47L,E01H

Abstract:
1. A filter system for a mobile surface maintenance machine comprising: a hopper adapted to receive debris thrown from a sweeping brush, said hopper capable of being lifted during a dumping procedure; a filter box containing at least one filter and being externally provided relative to the hopper, said filter box being connected to the machine at a location away from the hopper, said filter box being in selective air communication with the hopper so as to support a vacuum-based airflow through the hopper and said at least one filter when the hopper is lowered into an operational configuration, and during said dumping procedure said hopper is separated from and raised away from the filter box, wherein a vacuum impeller connected to the filter box draws air through the hopper and the filter, said filter box defining air conduits for directing filtered air out of the filter box; and a filter shaking mechanism to dislodge dust and debris from a surface of the filter, and said dust and debris accumulating on a bottom surface of the filter box.