B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
15/71, 183/94
B01D 46/02 (2006.01) A47L 11/24 (2006.01) B01D 46/24 (2006.01) B01D 46/52 (2006.01) E01H 1/08 (2006.01)
Patent
CA 1211382
ABSTRACT OF THE DISCLOSURE A high capacity filter and filtering system for a floor cleaning machine and the like is provided. The floor cleaning machine comprises a frame, wheels supporting the frame on the surface to be cleaned, a rotatable sweeping brush carried by the frame, and a hopper carried by the frame near the sweeping brush. The hopper has a dirt- and debris-receiving opening at a lower rear portion thereof through which dirt and debris are received from the brush. A dividing wall extends between side walls of the hopper and divides it into a lower dirt- and debris- receiving chamber and an upper exhaust chamber with an inlet opening communicating between the chambers. A manifold is removably supported by the hopper in the exhaust chamber and a plurality of filters extend downwardly from the manifold into the exhaust chamber. Each of the filters has a filter medium with pleats, the outer extremities of which define an outer surface and the inner extremities of which define a central, inner chamber which communicates with the interior of the mani- fold. An exhaust blower has an outlet communicating with the exterior of the hopper and an inlet communicating with the interior of the manifold. Air-borne dirt is collected on the exterior of the filters when the air is drawn through the hopper and the exhaust chamber. The filtered air then flows through the manifold to the exhaust blower and to the exterior of the hopper. A shaker motor is carried by the manifold to periodically shake dirt from the filters when it is operated. Air passages are also provided to supply air under pressure from the exterior of the hopper into the central chambers in the filters to expel collected dirt therefrom periodically.
442683
Mcgraw-Edison Company
Shapiro Cohen
LandOfFree
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