External Filter Chamber
First Claim
Patent Images
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; and
a filter box containing at least one filter and being externally provided relative to 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.
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Accused Products
Abstract
An external filter box for a surface maintenance machine having a hopper with selective communication being provided between the filter box and the hopper to permit dusty air to flow from the hopper to the filter box and to permit dust and debris captured by the filter box to flow into the hopper. In one example, the hopper includes a prefilter assembly which is coupled to an inlet of the filter box during a sweeping operation and which is removed away from the filter box during a hopper dump procedure.
12 Citations
31 Claims
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1. A filter system for a mobile surface maintenance machine comprising:
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a hopper adapted to receive debris thrown from a sweeping brush, said hopper capable of being lifted during a dumping procedure; and a filter box containing at least one filter and being externally provided relative to 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A filtration system for a mobile surface maintenance machine comprising:
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a hopper receiving debris from a sweeping brush and being lifted upward away from the brush during a hopper dumping procedure; a filter box housing a filter; a vacuum fan drawing air from the hopper through the filter; and an air conduit connecting the hopper to the filter box during machine operation so that dusty air from inside the hopper can flow into said filter box, said conduit being broken during a hopper dumping procedure and reestablished when the hopper dumping procedure is complete. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A surface maintenance machine comprising:
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a hopper connected to a wheeled chassis, said hopper being lifted away from a ground surface during a dumping procedure; a filter box connected to the chassis and being in selective air communication with the hopper; and a vacuum fan connected to the chassis, said fan drawing air through the hopper and filter box during a surface cleaning operation, and said air communication being broken upon the hopper being lifted. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A surface maintenance machine comprising:
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a hopper receiving debris thrown from a sweeping brush; a filter box having a filter therein and including an inlet port and an outlet port; a vacuum source adapted to draw air through the hopper and filter box; and a first conduit between the filter box and the hopper, said conduit being broken when the hopper is moved away from the sweeping brush and being reestablished when the hopper is moved back. - View Dependent Claims (21, 22)
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23. A filtration system for a mobile surface maintenance machine comprising:
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a hopper carried by the surface maintenance machine and receiving debris from a sweeping brush; a filter box in communication with the hopper; a vacuum impeller attached to the filter box and drawing air from the hopper through the filter box, and a cylindrical filter housed within the filter box. - View Dependent Claims (24, 25, 26, 27, 28)
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30. A filtration system for a mobile surface maintenance machine comprising:
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a hopper receiving debris from a sweeping brush of the machine; a filter box disposed away from the hopper and carrying at least one cylindrical filter; vacuum means for drawing air through the hopper and filter box; and means for providing fluid communication between the filter box and the hopper during a sweeping operation. - View Dependent Claims (31)
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Specification