Floor cleaning apparatus with squeegee mounting system

• US 5,628,086 A
• Filed: 05/31/1995
• Issued: 05/13/1997
• Est. Priority Date: 04/25/1994
• Status: Expired due to Term

• Current Assignee: Karcher North America Incorporated (Alfred Kärcher SE & Co. KG)
• Original Assignee: Windsor Industries Incorporated (Alfred Kärcher SE & Co. KG)
• Inventors: O'Hara, Robert J., Knowlton, Christopher M.
• Primary Examiner(s): Alexander, Reginald
• Application Number:
  US08/455,308
• Time in Patent Office: 713 Days
• Field of Search: 15/245, 15/401, 15/320, 15/340.1, 15/340.2, 15/340.3, 15/340.4
• US Class Current: 15/340.1
• 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 11/4044 Vacuuming or pick-up tools; Squeegees
• 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 pre-squeegee 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 squeegee mount that has a first squeegee mount end, a second squeegee mount end, a squeegee mount top edge, a squeegee mount bottom edge, a squeegee mount side surface that extends from said first squeegee mount end to said second squeegee mount end and from said squeegee mount top edge to said squeegee mount bottom edge;

a squeegee rubber that includes a first squeegee rubber end, a second squeegee rubber end, a squeegee rubber top edge, a squeegee rubber bottom edge, a first squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge, and a second squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge;

wherein one of said squeegee mount side surface and said first squeegee rubber side surface includes a crown and the other of said squeegee mount side surface and said first squeegee rubber side surface includes a first longitudinally extending slot dimensioned to fit over said crown and thereby prevent vertical displacement between said squeegee mount and said squeegee rubber

wherein said first longitudinally extending slot is capable of being entirely placed into contact with said squeegee mount at the same time.

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

when said squeegee mount side surface includes said crown and said first squeegee rubber side surface includes said first longitudinally extending slot, said second squeegee rubber side surface includes a second longitudinally extending slot that permits said squeegee rubber to be mounted to said squeegee mount side surface so that different portions of at least one of said squeegee rubber top edge and said squeegee rubber bottom edge can be positioned adjacent to the surface to be cleaned.

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

when said first squeegee rubber side surface includes said crown and said squeegee mount side surface includes said first longitudinally extending slot, said second squeegee rubber side surface includes a second longitudinally extending crown that permits portions of at least one of said squeegee rubber top edge and said squeegee rubber bottom edge to be positioned adjacent to the surface to be cleaned.

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

said squeegee mount includes a first buttonhead located on said squeegee mount side surface and adjacent to said first squeegee mount end and a second buttonhead located on said first squeegee mount side surface and adjacent to said second squeegee mount end;

said squeegee rubber includes a first squeegee rubber slot for engaging said first buttonhead and a second squeegee rubber slot for engaging said second buttonhead.

5. An apparatus, as claimed in claim 4, further comprising:

a fastening device for holding said squeegee rubber against said squeegee mount, said squeegee fastening device includes a first squeegee strap with a first squeegee strap slot for engaging said first buttonhead, a second squeegee strap with a second squeegee strap slot for engaging said second buttonhead, and means for clamping said first squeegee strap to said second squeegee strap to hold said squeegee rubber between said first and second squeegee straps and said squeegee mount.

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

said squeegee rubber has a squeegee rubber length that extends from said first squeegee rubber end to said second squeegee rubber end and is greater than a squeegee mount length that extends from said first squeegee mount end to said squeegee mount end.

7. An apparatus, as claimed in claim 1 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 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.

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

said longitudinally extending slot has a longitudinally extending opening that is capable of receiving said crown.

17. An apparatus, as claimed in claim 1, further comprising:

fastening means for holding said squeegee rubber against said squeegee mount, wherein said squeegee rubber is located between said squeegee mount and said fastening means.

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

said fastening means includes a first strap, a second strap, and means for connecting said first strap to said second strap.

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 squeegee mount that has a first squeegee mount end, a second squeegee mount end, a squeegee mount top edge, a squeegee mount bottom edge, a squeegee mount side surface that extends from said first squeegee mount end to said second squeegee mount end and from said squeegee mount top edge to said squeegee mount bottom edge;

a squeegee rubber that includes a first squeegee rubber end, a second squeegee rubber end, a squeegee rubber top edge, a squeegee rubber bottom edge, a first squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge, and a second squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge;

wherein said squeegee mount includes a first buttonhead located on said squeegee mount side surface and adjacent to said first squeegee mount end and a second buttonhead located on said first squeegee mount side surface and adjacent to said second squeegee mount end;

said squeegee rubber includes a first squeegee rubber slot for engaging said first buttonhead and a second squeegee rubber slot for engaging said second buttonhead;

a fastening device for holding said squeegee rubber against said squeegee mount, said squeegee fastening device includes a first squeegee strap with a first squeegee strap slot for engaging first buttonhead, a second squeegee strap with a second squeegee strap slot for engaging said second buttonhead, and means for clamping said first squeegee strap to said second squeegee strap to hold said squeegee rubber between said first and second squeegee straps and said squeegee mount.

9. An apparatus, as claimed in claim 8, wherein:

said squeegee rubber has a squeegee rubber length that extends from said first squeegee rubber end to said second squeegee rubber end and is greater than a squeegee mount length that extends from said first squeegee mount end to said squeegee mount end.

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 squeegee mount that has a first squeegee mount end, a second squeegee mount end, a squeegee mount top edge, a squeegee mount bottom edge, a squeegee mount side surface that extends from said first squeegee mount end to said second squeegee mount end and from said squeegee mount top edge to said squeegee mount bottom edge;

a squeegee rubber that includes a first squeegee rubber end, a second squeegee rubber end, a squeegee rubber top edge, a squeegee rubber bottom edge, a first squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge, and a second squeegee rubber side surface that extends from said first squeegee rubber end to said second squeegee rubber end and from said squeegee rubber top edge to said squeegee rubber bottom edge;

wherein one of said squeegee mount side surface and said first squeegee rubber side surface includes a crown and the other of said squeegee mount side surface and said first squeegee rubber side surface includes a first longitudinally extending slot dimensioned to fit over said crown and thereby prevent vertical displacement between said squeegee mount and said squeegee rubber; and

wherein said squeegee mount includes a first buttonhead located on said squeegee mount side surface and adjacent to said first squeegee mount end and a second buttonhead located on said first squeegee mount side surface and adjacent to said second squeegee mount end;

said squeegee rubber includes a first squeegee rubber slot for engaging said first buttonhead and a second squeegee rubber slot for engaging said second buttonhead.

11. A squeegee for use with a squeegee mount, the squeegee comprising:

a vertical member having a first lateral side, a second lateral side, a lower end with a first corner edge and a second corner edge; and

means for engaging the squeegee mount;

wherein said means for engaging includes a first engaging portion that laterally extends from said first lateral side and is capable of being entirely placed into contact with the squeegee mount at the same time;

wherein said first engaging portion includes a first arm extending from said first lateral side of said vertical member to a first arm terminal end and a second arm extending from said first lateral side of said vertical member to a second arm terminal end;

wherein said first arm terminal end and said second arm terminal and define a first opening for a first recess that is capable of receiving the squeegee mount;

wherein said first opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount;

wherein, when said first recess is disposed over squeegee mount, said first corner edge is operatively positioned for squeegeeing a surface.

12. A squeegee as claimed in claim 11, wherein said vertical member comprises:

an upper end with a third corner edge and a fourth corner edge;

wherein, when said first recess is disposed over the squeegee mount to operatively position said first corner edge for squeegeeing a surface and said first corner edge wears out, said first engaging portion can be disengaged from the squeegee mount, the squeegee then inverted relative to the squeegee mount, and said first engaging portion reengaged to the squeegee mount so that said third corner edge is operatively positioned for squeegeeing a surface.

13. A squeegee as claimed in claim 11, wherein:

said means for engaging includes a second engaging portion that laterally extends from said second lateral side and is capable of being entirely placed into contact with the squeegee mount at the same time;

wherein said second engaging portion includes a third arm extending from said second lateral side of said vertical member to a third arm terminal end and a fourth arm extending from said second lateral side of said first vertical member to a forth arm terminal end;

wherein said third arm terminal end and said fourth arm terminal end define a second opening for a second recess that is capable of receiving the squeegee mount;

wherein said second opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount surface;

said vertical member includes an upper end with a third corner edge and a fourth corner edge;

wherein, when said first recess is disposed over the squeege mount to operatively position said first corner edge for squeegeeing a surface and said first corner edge wears out, said first engaging portion can be disengaged from the squeegee mount and said second engaging portion can then be engaged to the squeegee mount to operatively position said second corner edge for squeegeeing a surface;

wherein, when either said first recess is disposed over the squeegee mount to operatively position said first corner edge for squeegeeing a surface and said first corner edge wears out or said second recess is disposed over the squeegee mount to operatively position said second corner edge for squeegeeing a surface and said second corner edge wears out, either said first engaging portion or second engaging portion can be disengaged from the squeegee mount, the squeegee then inverted relative to the squeegee mount, and either said first engaging portion or said second engaging portion reengaged to the squeegee mount so that either said third corner edge or said fourth corner edge is operatively positioned for squeegeeing a surface.

14. A squeegee, as claimed in claim 11, wherein;

said means for engaging includes a second engaging portion that laterally extends from said second lateral side and is capable of being entirely placed into contact with the squeegee mount at the same time;

wherein said second engaging portion includes a third arm extending from said second lateral side of said vertical member to a third arm terminal end and a fourth arm extending from said second lateral side of said vertical member to a fourth arm terminal end;

wherein said third arm terminal end and said fourth arm terminal end define a second opening for a second recess that is capable of receiving the squeegee mount;

wherein said second opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount surface;

wherein, when said second recess is disposed over the squeegee mount, said second corner edge is operatively positioned for squeegeeing a surface.

15. A squeegee for use with a squeegee mount that includes a crowned surface for receiving the squeegee, the crowned surface having a maximum vertical dimension, the squeegee comprising:

a vertical member having a first lateral side, a second lateral side, a lower end with a first corner edge and a second corner edge, and an upper end with a third corner edge and a fourth corner edge;

a first arm extending from said first lateral side of said vertical member to a first arm terminal end;

a second arm extending from said first lateral side of said vertical member to a second arm terminal end;

a third arm extending from said second lateral side of said vertical member to a third arm terminal end;

a fourth arm extending from said second lateral side of said vertical member to a fourth arm terminal end;

wherein said first arm terminal end and said second arm terminal end define a first opening for receiving the crowned surface of the squeegee mount;

wherein said first opening has a vertical dimension which is at least substantially equal to the maximum vertical dimension of the crowned surface;

wherein said third arm terminal end and said fourth arm terminal end define a second opening for receiving the crowned surface of the squeegee mount;

wherein said second opening has a vertical dimension which is at least substantially equal to the maximum vertical dimension of the crowned surface;

wherein said squeegee can be mounted on said crowned surface so that each of said first corner edge, said second corner edge, said third corner edge, and said fourth corner edge can be operatively positioned for squeegeeing a surface.

19. A squeegee for use with a squeegee mount, the squeegee comprising:

a vertical member having a first lateral side, a second lateral side, and a lower end with a first corner edge; and

means for engaging the squeegee mount; and

wherein said means for engaging includes a first engaging portion that laterally extends from said first lateral side;

wherein said first engaging portion includes a first arm extending from said first lateral side of said vertical member to a first arm terminal end and a second arm extending from said first lateral side of said vertical member to a second arm terminal end;

wherein said first arm terminal end and said second arm terminal end define a first opening for a first recess that is capable of receiving the squeegee mount;

wherein said first opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount;

wherein, said first recess can be disposed over the squeegee mount to operatively position said first corner edge for squeegeeing a surface.

20. A squeegee as claimed in claim 19, wherein:

said vertical member includes an upper end with a third corner edge;

wherein, said first recess can be disposed over the squeegee mount to operatively position said third corner edge for squeegeeing a surface.

21. A squeegee, as claimed in claim 19, wherein:

said lower end of said vertical member includes a second corner edge; and

said means for engaging includes a second engaging portion that laterally extends from said second lateral side;

wherein said second engaging portion includes a third arm extending from said second lateral side of said vertical member to a third arm terminal end and a fourth arm extending from said second lateral side of said vertical member to a fourth arm terminal end;

wherein said third arm terminal end and said fourth arm terminal end define a second opening for a second recess that is capable of receiving the squeegee mount;

wherein said second opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount surface;

wherein, said second recess can be disposed over the squeegee mount to operatively position said second corner edge for squeegeeing a surface.

22. A squeegee as claimed in claim 19, wherein:

said vertical member includes an upper end with a third corner edge and a fourth corner edge; and

said means for engaging includes a second engaging portion that laterally extends from said second lateral side;

wherein said second engaging portion includes a third arm extending from said second lateral side of said vertical member to a third arm terminal end and a fourth arm extending from said second lateral side of said vertical member to a fourth arm terminal end;

wherein said third arm terminal end and said fourth arm terminal end define a second opening for a second recess that is capable of receiving the squeegee mount;

wherein said second opening has a vertical dimension that is at least substantially equal to the maximum vertical dimension of the squeegee mount surface;

wherein, said first recess can be disposed over the squeegee mount to operatively position said third corner edge for squeegeeing a surface;

wherein, said second recess can be disposed over the squeegee mount to operatively position either said second corner edge or said fourth corner edge for squeegeeing a surface.