Dirt deflector for cleaning heads
First Claim
1. In apparatus for cleaning surfaces with recirculating air flow including a cleaning head defining an open-faced chamber for facing the surface to be cleaned;
- air recirculating conduit means for drawing air from said chamber through a first port in said chamber adjacent one end thereof, and for blowing air through a second port into said chamber, said air recirculating conduit means including impeller means for circulating air through said conduit means and dirt collector means in said conduit means; and
baffle means positioned in said cleaning head substantially between said one end and said first port to reduce the flow of dirt-laden air to said one end, the improvement comprising, in combination;
aperture means providing communication at a central portion of said baffle means substantially between said first port and that volume within said chamber which extends between said baffle means and said one end.
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Accused Products
Abstract
A cleaning head for an air flow type cleaner defines an open-faced chamber for facing the surface to be cleaned. An air recirculating conduit draws air from the chamber through a first port in the chamber adjacent one end thereof. A baffle in the cleaning head is positioned substantially between the one end and the first port to reduce the flow of dirt-laden air to the one end. By this invention, one or more apertures provide communication at a central portion of the baffle substantially between the first port and that volume within the chamber which extends between the baffle and the one end, to provide air suction to prevent dirt accumulation in that volume.
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Citations
20 Claims
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1. In apparatus for cleaning surfaces with recirculating air flow including a cleaning head defining an open-faced chamber for facing the surface to be cleaned;
- air recirculating conduit means for drawing air from said chamber through a first port in said chamber adjacent one end thereof, and for blowing air through a second port into said chamber, said air recirculating conduit means including impeller means for circulating air through said conduit means and dirt collector means in said conduit means; and
baffle means positioned in said cleaning head substantially between said one end and said first port to reduce the flow of dirt-laden air to said one end, the improvement comprising, in combination;aperture means providing communication at a central portion of said baffle means substantially between said first port and that volume within said chamber which extends between said baffle means and said one end. - View Dependent Claims (2, 3, 4, 5, 6)
- air recirculating conduit means for drawing air from said chamber through a first port in said chamber adjacent one end thereof, and for blowing air through a second port into said chamber, said air recirculating conduit means including impeller means for circulating air through said conduit means and dirt collector means in said conduit means; and
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7. In a street sweeping apparatus with recirculating air flow including a cleaning head defining an open-faced chamber for facing the street;
- air recirculating conduit means for drawing air from the chamber from a first port in the chamber adjacent one end thereof and for blowing air through a second port into said chamber, said air recirculating conduit means including impeller means and dirt collector means; and
baffle means positioned in said cleaning head substantially between said one end and the first port to reduce the flow of dirt-laden air to said one end, said open-faced chamber carrying resilient flap means extending about said open face into effective engagement with the surface to be cleaned, to provide at least a partial seal of said chamber and air recirculating conduit means, the improvement comprising, in combination;aperture means providing communication at a central portion of said baffle means substantially between said first port and that volume within said chamber which extends between said baffle means and said one end. - View Dependent Claims (8, 9, 10, 11)
- air recirculating conduit means for drawing air from the chamber from a first port in the chamber adjacent one end thereof and for blowing air through a second port into said chamber, said air recirculating conduit means including impeller means and dirt collector means; and
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12. A cleaning head for air flow type cleaning apparatus, which cleaning head defines an open-faced chamber for facing the surface to be cleaned, a first port in said chamber adjacent one end thereof and a second port positioned in said chamber for respectively withdrawing and inserting recirculating air through said chamber, and baffle means positioned in said cleaning head substantially between said one end and said first port to reduce the flow of dirt-laden air to said one end, the improvement comprising, in combination:
aperture means providing communication at a central portion of said baffle means substantially between said first port and that volume within said chamber which extends between said baffle means and said one end. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification