Stone polishing apparatus and method

• US 5,605,493 A
• Filed: 04/19/1994
• Issued: 02/25/1997
• Est. Priority Date: 04/19/1994
• Status: Expired due to Term

• Current Assignee: Nilfisk, Inc. (Japan) (Nilfisk Holding A/S)
• Original Assignee: Clarke's Industries, Inc.
• Inventors: Donatelli, Joseph M., Donatelli, Joseph, Castaldo, John A., Donatelli, Franklin P., Donatelli, Thomas P.
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US08/229,592
• Time in Patent Office: 1,043 Days
• Field of Search: 451/41, 451/57, 451/344, 451/350, 451/548, 451/352, 451/550, 451/353, 15/98, 15/49.1, 15/50.3, 15/320, 15/340.1
• US Class Current: 451/41
• CPC Class Codes: A47L 11/305 the tools being disc brushes
• CPC Class Codes: A47L 11/4013 Contaminants collecting devices, i.e. hoppers, tanks or the like
• 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 11/4066 Propulsion of the whole machine
• CPC Class Codes: A47L 11/4069 Driving or transmission means for the cleaning tools
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits
• CPC Class Codes: B24B 7/186 with disc-type tools
• CPC Class Codes: B24D 7/06 with inserted abrasive blocks, e.g. segmental

Abstract

A self-propelled battery operated stone floor polishing machine having dual rotating heads with detachable stone grinding, honing, and polishing pads. The polishing machine includes an integral solution tank for applying a liquid lubrication to the floor through the heads, a recovery tank for collecting the slurry generated by the grinding, honing, and polishing action, and an integral squeegee system that removes the liquid and particle slurry and thereafter transfers the slurry to the recovery tank. The grinding pads are integrated with metallic alloys, bonding industrial diamond abrasives for grinding marble, granite, poured terrazzo, precast terrazzo, cement, concrete, porcelain tile, ceramic tile, teracotta tile, but are not limited to these stone surfaces. A single operator may grind, hone, and polish up to 1,500 square feet of stone floors in a normal work day.

Claims

1. A method of polishing a stone floor with a self-propelled stone polishing machine having a solution tank with a liquid lubricant therein, a recovery tank, a vacuum assembly for removing material from the floor and delivering it to the recovery tank, and a disc pad driver assembly having a rotatable shaft, the method comprising the steps of:

attaching a disc pad having a stone abrading surface on one side to the rotatable shaft of the pad driver assembly such that the stone abrading surface is adjacent the floor, the disc pad being rotatable with the rotatable shaft;

applying the liquid lubricant from the solution tank to the area between the stone abrading surface of the disc pad and the stone floor;

rotating the disc pad to abrade a portion of the stone floor so as to create a slurry from the liquid lubricant and the stone floor; and

moving the machine so that the vacuum assembly contacts the slurry to deposit the slurry in the recovery tank, and the rotating disc pad contacts another portion of the stone floor.

2. The method of polishing a stone floor of claim 1, wherein said attaching step comprises removably attaching said disc pad to said rotatable shaft.

3. The method of polishing a stone floor of claim 2, wherein said attaching step comprises attaching a grinding disc pad to said rotatable shaft, followed by said applying, rotating and moving steps, said method further comprising

attaching a honing disc pad to the rotatable shaft,

repeating said applying, rotating and moving steps,

attaching a polishing disc pad to the rotatable shaft, and

repeating said applying, rotating and moving steps.

4. A machine for wet polishing stone floors comprising:

a frame;

a solution tank carried by said frame, for holding a liquid lubricant;

a head assembly carried by said frame, said head assembly including a disc motor having a rotatable shaft;

a disc pad detachably carried by said head assembly and coupled to said shaft for rotation therewith, said disc pad having a stone abrading surface on one side adapted to be in contact with the floor for rotating thereon and effecting abrading thereof, said solution tank being in fluid communication with said disc pad and being adapted to supply the liquid lubricant between said floor and said disc pad to create a slurry when said disc pad is effecting abrading of the floor;

a squeegee assembly carried by said frame for wiping the slurry from the floor;

a recovery tank in fluid communication with said squeegee assembly; and

a pump in communication with said recovery tank and said squeegee assembly for transferring the slurry from said squeegee assembly to said recovery tank.

5. The stone floor polishing machine of claim 4, further comprising:

a storage battery supplying electrical power to drive said disc motor and said pump;

a drive motor coupled to said battery; and

a drive wheel disposed underneath said frame and coupled thereto, said drive wheel drivingly coupled to said drive motor such that the polishing machine is propelled thereby.

6. The stone floor polishing machine of claim 4, wherein said head assembly is pivotably attached to said frame.

7. The stone floor polishing machine of claim 4, wherein said stone abrading surface is comprised of a plurality of abrading discs.

8. The stone floor polishing machine of claim 7, wherein said plurality of abrading discs are detachably connected to said disc pad.

9. The stone floor polishing machine of claim 7, wherein said plurality of abrading discs have industrial diamonds embedded therein.

10. A self-propelled stone polishing machine comprising:

a frame;

a housing carried by said frame, said housing defining a first tank, a second tank, and an interior chamber;

a battery disposed within said interior chamber;

a drive assembly including a motor and a wheel drivingly coupled to said motor, said drive assembly coupled to said battery for obtaining electrical energy therefrom and adapted to propel said frame;

a pad driver assembly carried by said frame, said pad driver assembly including a disc pad rotatably coupled to a driver motor, said disc pad having a stone abrading surface on one side thereof adapted to rotatably contact the floor, said driver motor coupled to said battery for obtaining electrical energy therefrom;

a conduit in communication with said first tank and said disc pad, said first tank containing a liquid lubricant and said conduit adapted to deliver the liquid lubricant between the disc pad and the floor such that the rotating contact action of said stone abrading surface of said disc pad with the floor creates a slurry with the liquid lubricant; and

a vacuum assembly in fluid communication with said second tank, said vacuum assembly including a squeegee carried by said frame and adapted to abut for wiping said slurry from the floor, and a vacuum pump in communication with said second tank and said squeegee for vacuuming the slurry contacted by said squeegee on the floor and depositing the slurry into said second tank for later disposal.

11. The self-propelled stone polishing machine of claim 10, wherein said pad driver assembly is pivotably coupled to said frame.

12. The self-propelled stone polishing machine of claim 10, wherein said disc pad is detachably coupled to said drive motor.

13. The stone floor polishing machine of claim 10, wherein said stone abrading surface is comprised of a plurality of abrading discs.

14. The stone floor polishing machine of claim 13, wherein said plurality of abrading discs are detachably connected to said disc pad.

15. The stone floor polishing machine of claim 13, wherein said plurality of abrading discs have industrial diamonds embedded therein.