Floor cleaning apparatus with two brooms

• US 5,802,665 A
• Filed: 06/06/1995
• Issued: 09/08/1998
• Est. Priority Date: 04/25/1994
• Status: Expired due to Term

• Current Assignee: Karcher North America Incorporated (Alfred Kärcher SE & Co. KG)
• Original Assignee: Widsor Industries Incorporated
• Inventors: Strickland, Timothy A., O'Hara, Robert J., Knowlton, Christopher M.
• Primary Examiner(s): TILL, TERRENCE R
• Application Number:
  US08/479,710
• Time in Patent Office: 1,190 Days
• Field of Search: 15/320, 15/340.1, 15/340.3, 15/340.4
• US Class Current: 15/340.4
• CPC Class Codes: A47L 11/24 Floor-sweeping machines, motor-driven
• CPC Class Codes: A47L 11/29 Floor-scrubbing machines characterised by means for taking-up dirty liquid
• CPC Class Codes: A47L 11/293 the tools being disc brushes
• CPC Class Codes: A47L 11/30 by suction
• CPC Class Codes: A47L 11/302 having rotary tools
• CPC Class Codes: A47L 11/4041 Roll shaped surface treating tools
• CPC Class Codes: A47L 11/4044 Vacuuming or pick-up tools; Squeegees
• CPC Class Codes: A47L 11/4055 for lifting the tools to a non-working position
• CPC Class Codes: A47L 11/4061 Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated

Abstract

The present invention provides an apparatus for cleaning floors. In one embodiment, the apparatus includes four wheels, two of which are steerable wheels, and a steering mechanism that permits the two steerable wheels to turn to a degree that allows very tight turns to be made by the sweeper. In another embodiment, the apparatus is a sweeper with a cylindrical side broom. Yet a further embodiment of the sweeper includes flaps or seals that form a skirt about the broom and a mounting mechanism for slidably receiving the flap or seal. In a further embodiment, the apparatus is a sweeper that employs flaps with wear indicators that tell an operator when to adjust or replace the flap. In another embodiment, the apparatus is a sweeper that utilizes a pre-filter to remove debris that remains in the vacuum airstream after having passed through the hopper and that is of a size that can require frequent cleaning of a subsequent filtering device. In yet a further embodiment, the apparatus is a scrubber with two counter rotating disk brushes, a primary squeegee, and a second or presqueegee for relieving the primary squeegee from processing the heavier concentration of wastewater produced in the area between the brushes. In yet another embodiment, the apparatus is a scrubber that includes a squeegee mounting systems that is relatively easy to use and permits the squeegee rubber to extend beyond the end of the mounting structure.

Claims

1. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

wherein said means for cleaning includes a second broom that, when in use, rotates about an axis that is substantially parallel to a surface and that is located in a second area that is outside of said first area; and

wherein said means for cleaning includes means for selectively positioning said second broom between (1) an operative position in which said axis is substantially parallel to a surface and (2) an inoperative position in which said axis is not substantially parallel to the surface;

wherein said means for cleaning includes means for adjusting the distance of said axis of said second broom relative to the surface when said second broom is in said operative position.

2. An apparatus, as claimed in claim 1, wherein:

said cleaning means include a hood, and

said hood includes a recirculating flap for reintroducing debris that has become entrained in and subsequently expelled from said second broom back into said second broom.

3. An apparatus, as claimed in claim 1, wherein:

said cleaning means a hood, and

said hood includes a vacuum attachment for use in removing debris that has become entrained in and subsequently expelled from said second broom.

6. An apparatus, as claimed in claim 1, wherein:

said means for cleaning includes means for pivotally positioning said second broom when said second broom is in said operative position.

14. An apparatus, as claimed in claim 1, wherein:

said means for selectively positioning includes a screw.

15. An apparatus, as claimed in claim 1, wherein:

said means for selectively positioning includes an electric motor.

16. An apparatus, as claimed in claim 1, wherein:

said means for selectively positioning includes an electric motor, a screw, and a gear box for engaging said electric motor and said screw so that said screw can be selectively rotated in a clockwise direction and a counter clockwise direction.

17. An apparatus, as claimed in claim 1, wherein:

said means for adjusting includes a first arm that is rotatable about a first pivot point, a second arm that is rotatable about a second pivot point, a screw mechanism that is operatively connected to said second arm, and a pin that operatively engages said first arm and said second arm;

wherein, upon activation of said screw, said first and second arms rotate about said first and second pivot points, said first and second arms remain substantially parallel to one another and said pin is vertically displaced to adjust the distance of said axis of said second broom from the surface when said second broom is in said operative position.

18. An apparatus, as claimed in claim 1, wherein:

said second broom, when in operation, is located in front of said first broom when the apparatus is moving in a forward direction.

4. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said hood includes a first hood section and a second hood section for covering an end of said second broom and means for detaching said second hood section from said first hood section so that said second broom can be positioned and operated adjacent to walls and the like.

5. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said means for cleaning includes means for positioning said second broom to a first lateral side of said frame and to a second lateral side of said frame.

7. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area, and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said means for cleaning includes means for permitting said second broom to rotate about a vertical axis relative to said surface.

8. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said means for cleaning includes means for absorbing shocks imparted to said second broom by external objects.

9. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said first broom, when in use, rotates about an axis that is substantially parallel to said surface.

10. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said means for cleaning includes a flap and means for mounting said flap to said frame;

wherein said flap includes an upper edge having a first thickness and a lower edge having a second thickness that is less than said first thickness;

wherein said means for mounting includes a first longitudinal extending slot for holding said flap, said slot having an upper portion for holding said upper edge of said flap and a lower portion for holding at least a portion of said lower edge but incapable of accommodating said upper edge of said flap;

wherein said flap can be slidably inserted into and slidably removed from said slot.

11. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

wherein said means for cleaning includes a flexible, substantially planar member that includes a first terminal edge and a second terminal edge, wherein when said flexible, substantially planar member is in use, said first terminal edge contacts said surface and said second terminal edge is operatively connected to said frame and separated from said surface;

wherein said flexible, substantially planar member includes a wear indicator located between said first and second terminal edges and, prior to any wear of said first terminal edge, separated from said first terminal edge.

12. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to said surface and that is located in a second area that is outside of said first area; and

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

said means for cleaning includes a hopper for receiving a debris laden airstream, precipitating first heavier debris from said debris laden airstream, collecting said first heavier debris, and providing a first exit airstream that may contain lighter debris;

a pre-filter for receiving said first exit airstream, precipitating out second heavier debris that is generally lighter than said first heavier debris from said first exit airstream, collecting said second heavier debris, and providing a second exit airstream that may contain lighter debris; and

a filter for receiving said second exit airstream, precipitating out third heavier debris that is generally lighter than said first and second heavier debris from said airstream, collecting third heavier debris and providing a third exit airstream that is substantially free of debris;

wherein said pre-filter includes vanes for creating a vortex.

13. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

wherein said means for cleaning includes;

a first broom that is substantially located within a first area bounded by an exterior body of the apparatus;

a second broom that, when in use, rotates about an axis that is substantially parallel to a surface and that is located in a second area that is outside of said first area;

means for selectively positioning said second broom between (1) an operative position in which said axis is substantially parallel to a surface and (2) an inoperative position in which said axis is not substantially parallel to the surface;

means for adjusting the distance of said axis of said second broom relative to the surface when said second broom is in said operative position;

means for positioning said second broom to either of a first lateral side of said frame and to a second lateral side of said frame;

means for absorbing shocks imparted to said second broom by external objects that permits said second broom to rotate about an axis that is substantially perpendicular to the surface;

a hood that covers said second broom to constrain debris that has become entrained in said second broom;

a recirculating flap, operatively attached to said hood, for reintroducing debris that has become entrained in and subsequently expelled from said second broom back into said second broom; and

a vacuum attachment, operatively attached to said hood, for use in removing debris that has become entrained in and subsequently expelled from said second broom.

19. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

a front extent, rear extent, first lateral extent, and second lateral extent defining a first area in which said frame, said at least three wheels, and said means for steering are located;

wherein said means for cleaning includes a first broom that is substantially located within said first area;

wherein said means for cleaning includes a second broom that, when in use, rotates about a first axis that is substantially parallel to a surface and that is located in a second area that is outside of said first area; and

wherein said means for cleaning includes means for selectively positioning said second broom in a first lateral position that is beyond said first lateral extent and a second lateral position that is beyond said second lateral extent so that said second broom can sweep adjacent to walls and the that cannot be swept by said first broom due to said first and second lateral extents.

20. An apparatus, as claimed in claim 19, wherein:

said means for positioning includes two springs.

21. An apparatus, as claimed in claim 20, wherein:

said means for positioning includes means for causing said second broom to move to one of said first lateral position and said second lateral position if said second broom is in a position other than said first lateral position and said second lateral position.

22. An apparatus for cleaning a surface comprising:

a frame;

means, operatively attached to said frame, for cleaning a surface;

at least three wheels for moving said frame and said means for cleaning over a surface; and

means for steering at least one of said at least three wheels;

a front extent, a rear extent, a first lateral side extent, and a second lateral side extent defining a first area in which said frame, said at least three wheels, and said means for steering are located;

wherein said means for cleaning includes a first broom that is substantially located within said first area;

wherein said means for cleaning includes a second broom with a first end and a second end and that, when in use, rotates about a first axis that is substantially parallel to said surface and is located in a second area that is outside of said first area; and

wherein said means for cleaning includes means for absorbing shocks imparted to said second broom by external objects by permitting said second broom to rotate about an axis that is substantially perpendicular to the surface.

23. An apparatus, as claimed in claim 22, wherein:

said axis is located between said first and second ends of said second broom.

24. An apparatus, as claimed in claim 23, wherein:

said means for absorbing includes a pair of springs.

25. An apparatus, as claimed in claim 22, wherein:

said axis is located outside the area occupied by said second broom.

26. An apparatus, as claimed in claim 22, wherein:

said means for absorbing includes a pair of springs.

27. An apparatus, as claimed in claim 22, wherein:

said means for absorbing includes means for urging said second broom towards a position occupied by said second broom prior to receiving a shock.

28. An apparatus, as claimed in claim 22, wherein:

said means for absorbing includes a first shock absorber and a second shock absorber.

29. An apparatus, as claimed in claim 28, wherein:

said first shock absorber includes a pair of springs.

30. An apparatus, as claimed in claim 28, wherein:

said first shock absorber includes a first pair of springs; and

said second shock absorber includes a second pair of springs.