High efficiency squeegee

• US 6,108,859 A
• Filed: 07/29/1998
• Issued: 08/29/2000
• Est. Priority Date: 07/29/1998
• Status: Expired due to Term

• Current Assignee: Nilfisk A/S (Nilfisk Holding A/S)
• Original Assignee: ALTO US Incorporated (ALTO U.S.)
• Inventors: Burgoon, Jack L.
• Primary Examiner(s): Till, Terrence R.
• Assistant Examiner(s): Snider, Theresa T.
• Application Number:
  US09/124,324
• Time in Patent Office: 762 Days
• Field of Search: 15/320, 15/340.4, 15/401
• US Class Current: 15/320
• CPC Class Codes: A47L 11/30 by suction
• CPC Class Codes: A47L 11/4038 Disk shaped surface treating 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
• CPC Class Codes: A47L 11/4072 Arrangement of castors or wheels
• CPC Class Codes: A47L 11/408 Means for supplying cleaning or surface treating agents

Abstract

A squeegee for use with a mobile surface scrubber to collect used liquid on a surface after being cleaned by the scrubber. The scrubber includes a mobile frame, a cleaning solution dispensing system mounted on the frame for wetting the surface with liquid, and at least one scrub brush attached to the frame for scrubbing the surface when wetted with liquid. In addition, the scrubber includes a vacuum system connected to the frame for removing liquid from the surface. The squeegee includes an elongate squeegee blade of flexible material having a lower edge engageable with the surface to collect the liquid on the surface for removal by the vacuum system. The squeegee also includes a series of openings through the squeegee blade extending up from the lower edge at intervals along the blade. Each opening tapers when the lower edge engages the surface to provide a relatively wide gap at the lower edge of the blade thereby permitting liquid to pass readily therethrough, and a narrower gap at an upper end of the opening having substantially no width thereby limiting passage of ambient air through the opening.

Claims

1. A squeegee for use with a mobile surface scrubber to collect liquid on a surface after being cleaned by the scrubber, said scrubber comprising a mobile frame, a cleaning solution dispensing system mounted on the frame for wetting the surface with liquid, at least one scrub brush attached to the frame for scrubbing the surface when wetted with liquid, and a vacuum system connected to the frame for removing used liquid from the surface, said squeegee comprising:

an elongate squeegee blade of flexible material having a lower edge engageable with said surface to collect liquid on the surface for removal by the vacuum system; and

a series of openings through the squeegee blade extending up from its lower edge at intervals along the blade, each opening tapering when the lower edge engages the surface to provide a relatively wide gap at the lower edge of the blade thereby permitting liquid to pass readily therethrough, and a narrower gap at an upper end of the opening having substantially no width thereby limiting passage of ambient air through the opening.

2. A squeegee as set forth in claim 1 wherein the openings in said squeegee blade are formed by slits in the blade, and wherein the blade is adapted to deflect as it engages the surface to open the slits thereby forming said relatively wide gaps at the lower edge of the blade.

3. A squeegee as set forth in claim 2 wherein each opening tapers substantially uniformly from said lower edge of the blade up to said upper end of the opening.

4. A squeegee as set forth in claim 3 wherein each slit is defined by a cut having a kerf of substantially no width.

5. A squeegee as set forth in claim 4 wherein the blade has an upper edge opposite said lower edge and the squeegee further comprises a series of slits through the squeegee blade extending down from the upper edge at intervals along the blade so the blade is invertible.

6. A squeegee assembly for use with a mobile surface scrubber to collect liquid on a surface after being cleaned by the scrubber, said scrubber comprising a mobile frame, a cleaning solution dispensing system mounted on the frame for wetting the surface with liquid, at least one scrub brush attached to the frame for scrubbing the surface when wetted with liquid, and a vacuum system connected to the frame for removing liquid from the surface, said squeegee assembly comprising:

leading and trailing elongate squeegee blades of flexible material, each blade having a lower edge engageable with said surface to collect liquid on the surface for removal by the vacuum system;

a mount for mounting the leading and trailing squeegee blades to the scrubber frame in spaced apart relation to define a chamber therebetween for accumulating liquid collected by the squeegee blades, the chamber communicating with the vacuum system for removing accumulated liquid from the chamber; and

a series of openings through the leading squeegee blade extending up from its lower edge at intervals along the blade, each opening tapering when the lower edge engages the surface to provide a relatively wide gap at the lower edge of the blade thereby permitting liquid to pass readily therethrough into said chamber, and a narrower gap at an upper end of the opening having substantially no width thereby limiting passage of ambient air into said chamber.

7. A squeegee assembly as set forth in claim 6 wherein the openings in said leading squeegee blade are formed by slits in the blade, and wherein the leading blade is mounted so as to permit the blade to deflect as it engages the surface to open the slits thereby forming said relatively wide gaps at the lower edge of the blade.

8. A squeegee assembly as set forth in claim 7 wherein each opening tapers substantially uniformly from said lower edge of the leading blade up to said upper end of the opening.

9. A squeegee assembly as set forth in claim 8 wherein each slit is defined by a cut having a kerf of substantially no width.

10. A squeegee assembly as set forth in claim 9 wherein said mount comprises an arcuate blade support extending generally transversely with respect to the scrubber, the support holding the blade so as to permit the blade to deflect to conform to the surface.

11. A mobile surface scrubber for cleaning a surface with liquid, said scrubber comprising:

a mobile frame;

a cleaning solution dispensing system mounted on the frame for wetting the surface with liquid;

at least one scrub brush attached to the frame for scrubbing the surface when wetted with liquid;

a vacuum system connected to the frame for removing liquid from the surface;

leading and trailing elongate squeegee blades of flexible material mounted on the frame, each blade having a lower edge engageable with said surface to collect liquid on the surface for removal by the vacuum system, the leading and trailing squeegee blades being mounted on the frame in spaced apart relation to define a chamber therebetween for accumulating liquid collected by the squeegee blades, the chamber communicating with the vacuum system for removing accumulated liquid from the chamber; and

a series of openings through the leading squeegee blade extending up from the lower edge at intervals along the blade, each opening tapering when the lower edge engages the surface to provide a relatively wide gap at the lower edge of the blade thereby permitting liquid to pass readily therethrough into said chamber, and a narrower gap at an upper end of the opening having substantially no width thereby limiting passage of ambient air into said chamber.

12. A scrubber as set forth in claim 11 further comprising a mount for mounting the leading and trailing squeegee blades to the scrubber frame.

13. A scrubber as set forth in claim 12 wherein said mount comprises an arcuate blade support extending generally transversely with respect to the scrubber, the support holding the blade so as to permit the blade to deflect to conform to the surface.