Floor cleaning apparatus with contouring broom

• US 5,881,417 A
• Filed: 09/29/1995
• Issued: 03/16/1999
• 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: Knowlton, Christopher M.
• Primary Examiner(s): Graham, Gary K.
• Application Number:
  US08/537,272
• Time in Patent Office: 1,264 Days
• Field of Search: 015/340.1, 015/340.2, 015/340.3, 015/340.4, 015/320, 015/322, 015/401, 015/98, 015/49.1, 015/50.1, 015/50.2, 015/50.3, 015/82, 015/87, 015/83, 015/84, 015/85 , 015/86, 015/52.1
• US Class Current: 15/52.1
• 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 11/4041 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

A contouring broom assembly is provided for following contours of a surface. The assembly includes an angling contour mechanism (600) for allowing a cylindrical side broom (140) to angle relative to horizontal and an elevating contour mechanism (610) for allowing the cylindrical side broom to rise and fall in a substantially linear fashion. The mechanisms (600 and 610) operate separately to allow for independent elevating and angling and each of the mechanisms can be operated without active user involvement, for example, responsive to pressure exerted on the cylindrical side broom by the surface due to traversing a contour. A scrubber squeegee assembly (620) formed from discrete units (622, 624 and 626) is also disclosed. The assembly (620) allows for independent selection of the materials or characteristics of each unit (622, 624 or 626).

Claims

1. An assembly for use in connection with a cleaning device for cleaning an irregular surface, the assembly comprising:

a frame;

at least three wheels coupled with said frame for moving said frame, wherein said at least three wheels define a plane;

a body coupled with said frame having a front surface, a rear surface, a first side surface and a second side surface;

means, operatively attached to said frame, for cleaning the irregular surface;

wherein said means for cleaning includes first means for sweeping a portion of the irregular surface that is located within a first area bounded by said front, rear, first side and second side surfaces of said body;

wherein said means for cleaning includes second means for sweeping at least a portion of the irregular surface located in a second area that is outside of said first area,

wherein said means for cleaning includes means for storing at least a portion of the sweepings of at least one of said first and second means for sweeping;

wherein said second means for sweeping includes a cylindrical broom that is rotatable about a longitudinal axis;

wherein said second means for sweeping includes means for selectively positioning said cylindrical broom between (1) an operative position in which said longitudinal axis is substantially parallel to said plane and (2) an inoperative position in which said longitudinal axis is not substantially parallel to said plane; and

wherein said second means for sweeping includes means for automatically adapting to topographic changes in said irregular surface when said cylindrical broom is in said operative position by allowing said cylindrical broom to follow said surface, wherein said cylindrical broom follows said surface without operator intervention.

2. The assembly of claim 1, wherein said means for automatically adapting comprises means for allowing substantially linear movement of said cylindrical broom in response to said topographic changes in the surface so that said longitudinal axis of said cylindrical broom is vertically displaced relative to said plane.

3. The assembly of claim 1, wherein said means for automatically adapting comprises means for allowing arcuate movement of said cylindrical broom in response to said topographic changes in the surface so that a first portion of said longitudinal axis is vertically displaced relative to said plane a first distance and a second portion of said longitudinal axis is vertically displaced relative to said plane a second distance that is different from said first distance.

4. The assembly of claim 1, wherein:

said means for selectively positioning includes an arm that is movable between said operative and inoperative positions; and

said means for automatically adapting includes a linkage that operatively connects said arm and said cylindrical broom, wherein said linkage includes means for allowing linear movement of said cylindrical broom when said broom is in said operative position so that said longitudinal axis of said broom is vertically displaced relative to said plane.

5. The assembly of claim 4, wherein:

said means for allowing linear movement of said cylindrical broom operates without requiring movement of said arm.

6. The assembly of claim 1, wherein:

said cylindrical broom having a first end and a second end;

wherein, when said cylindrical broom is in said inoperative position, said first end of said cylindrical broom is closer to the surface than said second end of said cylindrical broom;

wherein, when said cylindrical broom is in said operative position, said means for automatically adapting allows arcuate movement of said cylindrical broom such that said first end of said cylindrical broom is closer to the surface than said second end of said cylindrical broom.

7. The assembly of claim 1, wherein:

said second means includes means for absorbing horizontal shocks received by said cylindrical broom.

8. The assembly of claim 7, wherein:

said means for absorbing horizontal shocks includes means for allowing said cylindrical broom to rotate about an axis that is substantially perpendicular to said plane.

9. The assembly of claim 8, wherein:

said cylindrical broom includes a first end and a second end; and

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

10. The assembly of claim 8, wherein:

said cylindrical broom includes a first end and a second end;

said axis is located outside of the area between said first and second ends of said cylindrical broom.

11. An assembly for use in connection with a device for cleaning an irregular surface, said surface having a first plane and a second plane that is different from said first plane, said device including a body with an external surface, said assembly including:

a cylindrical broom having a longitudinal axis;

first means, adapted for connection to the body, for supporting said cylindrical broom outside the external surface of the body;

second means, interconnected to said first means, for allowing angular movement of said cylindrical broom relative to said first plane so that said cylindrical broom can sweep said second plane when said second plane is at an angle to said first plane, wherein said broom is movable between a first position wherein said longitudinal axis of the broom is substantially parallel with said first plane and a second position where said longitudinal axis of said broom is substantially parallel with said second plane; and

third means, interconnected to said first means, for allowing vertical movement of said cylindrical broom relative to said first plane so that said cylindrical broom can sweep said second plane when said second plane is substantially parallel to said first plane;

wherein said second means and third means being separately operable such that said broom can be raised or lowered using said third means separate from angling of said broom using said second means.

12. The assembly of claim 11, wherein one of said second and third means comprises means for allowing movement of said broom in response to pressure exerted on said broom by said surface, wherein said broom can respond to topographic variation of said surface free from involvement of an operator.

13. The assembly of claim 11, wherein one of said second and third means comprises actuator means for allowing user-directed movement of said broom and contouring means for allowing movement of said sweeper free from operation of said actuator.