Sweeper with electromagnetic filter cleaning
First Claim
1. A sweeping machine including a housing, wheels for moving the housing, a sweeping brush mounted on the housing, a hopper positioned adjacent the brush to receive dust and debris therefrom, a dust collection chamber on the housing, a vacuum fan mounted on the housing and creating an air flow path from the brush through the hopper and to the dust collection chamber, a filter element in said air flow path, said filter element including a plurality of generally parallel pleats extending in a direction transverse to the air flow path, a plurality of electric coils positioned adjacent said pleats, a plurality of metal elements associated with said pleats, and means for applying pulsed electric power to said electric coils, with the electromagnetic fields caused thereby moving said metal elements and the pleats associated therewith to impart a shaking cleaning movement to said pleats.
3 Assignments
0 Petitions
Accused Products
Abstract
A sweeping machine includes a housing, wheels for moving the housing and a sweeping brush mounted on the housing. There is a hopper positioned adjacent the brush to receive dust and debris from the rotating brush. A dust collection chamber is located on the housing and a vacuum fan mounted on the housing creates an air flow path from the brush through the hopper into the dust collection chamber. A filter element is positioned in the air flow path with the filter element including a plurality of generally parallel pleats extending in a direction transverse to the air flow path. There is a plurality of electric coils positioned adjacent the pleats. A plurality of metal elements are associated with the pleats. Pulsed electric power is applied to the coils with the electromagnetic fields caused thereby moving the metal elements reciprocally back and forth and the pleats associated therewith to impart a shaking, cleaning movement to the pleats.
51 Citations
35 Claims
- 1. A sweeping machine including a housing, wheels for moving the housing, a sweeping brush mounted on the housing, a hopper positioned adjacent the brush to receive dust and debris therefrom, a dust collection chamber on the housing, a vacuum fan mounted on the housing and creating an air flow path from the brush through the hopper and to the dust collection chamber, a filter element in said air flow path, said filter element including a plurality of generally parallel pleats extending in a direction transverse to the air flow path, a plurality of electric coils positioned adjacent said pleats, a plurality of metal elements associated with said pleats, and means for applying pulsed electric power to said electric coils, with the electromagnetic fields caused thereby moving said metal elements and the pleats associated therewith to impart a shaking cleaning movement to said pleats.
- 18. A pleated air filter and means for cleaning it, said filter including a frame, a plurality of generally parallel pleats mounted in said frame, said pleats each having spaced parallel upper and lower folds, an elongated metal element associated with certain of the pleat upper folds, at least one electric coil mounted on said frame above the pleat upper folds, means for applying pulsed electric power to said at least one coil to create art electromagnetic field thereby, which pulsed electromagnetic field causes reciprocal movement of said metal element in a direction transverse to said generally parallel pleats to impart a shaking, cleaning movement to said pleats.
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35. A sweeping machine including a housing, wheels for moving the housing, a sweeping brush mounted on the housing, a hopper positioned adjacent the brush to receive dust and debris therefrom, a dust collection chamber on the housing, a vacuum fan mounted on the housing and creating an air flow path from the brush through the hopper and to the dust collection chamber, a filter element in said air flow path, said filter element including a plurality of generally parallel pleats extending in a direction transverse to the air flow path, at least one electric coil positioned adjacent said pleats, at least one metal element associated with said pleats, and means for applying electric power to said at least one coil, with the electromagnetic field caused thereby moving said at least one metal element and the pleats associated therewith to impart a shaking cleaning movement to said pleats.
Specification