Method of using polishing or grinding pad assembly

Patent metadata

Field	Value
Publication number	US-11084140-B2
Application number	US-201916718641-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Sep 24, 2015
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A floor polishing or grinding pad assembly is provided. In one aspect, a polishing or grinding pad assembly employs a fibrous pad, a reinforcement layer or ring, and multiple floor-contacting disks. In another aspect, the reinforcement layer includes a central hole through which the fibrous pad is accessible and the fibrous pad at the hole has a linear dimension greater than a linear dimension of one side of the adjacent reinforcement layer. In yet another aspect, at least one of the floor-contacting disks has an angle offset from that of a base surface of the disk, the fibrous pad and/or the reinforcement layer. A further aspect employs a smaller set of disks alternating between and/or offset from a larger set of the disks. In another aspect, the reinforcement layer includes a wavy or undulating internal edge shape.

First claim

The invention claimed is:

1. A pad assembly comprising:
a fibrous pad comprising an upper surface, a floor-facing lower surface, and a peripheral surface;
a reinforcement layer; and
abrasive tools,
wherein the reinforcement layer is attached to the floor-facing lower surface of the fibrous pad, the reinforcement layer including an internal edge defining a hole therethrough;
wherein the abrasive tools are attached to a floor-facing surface of the reinforcement layer;
wherein a central area of the fibrous pad is exposed through the hole of the reinforcement layer;
wherein the abrasive tools are disks; and
wherein each of the disks has a floor-contacting nominal surface which is angularly offset by at least two degrees relative to the floor-facing surface of the reinforcement layer.

2. The pad assembly according to claim 1 , wherein the fibrous pad is flexible.

3. The pad assembly according to claim 1 , wherein the reinforcement layer is elastomeric or polymeric.

4. The pad assembly according to claim 1 , wherein the reinforcement layer has a thickness up to 0.125 inches.

5. The pad assembly according to claim 1 , wherein the fibrous pad includes diamond abrasive particles and has thickness of about 1 inch.

6. The pad assembly according to claim 1 , wherein a thickness of the reinforcement layer is less than a thickness of the fibrous pad.

7. The pad assembly according to claim 1 , wherein the reinforcement layer has a wavy or undulating inner edge relative to a circular outer peripheral edge of the reinforcement layer.

8. The pad assembly according to claim 1 , wherein the inner edge of the reinforcement layer has peaks with less radial distance from a center of the floor-facing surface of the fibrous pad than valleys formed between adjacent peaks.

9. The pad assembly according to claim 1 , wherein the inner edge of the reinforcement layer is circular.

10. The pad assembly according to claim 1 , wherein a periphery of the reinforcement layer is circular.

11. The pad assembly according to claim 1 , wherein the abrasive tools are adhesively bonded to the reinforcement layer and substantially equally spaced away from a centerline of the fibrous pad.

12. The pad assembly according to claim 1 , wherein the abrasive tools are disks having a peripheral diameter of about 0.5-2.5 inches.

13. The pad assembly according to claim 1 , wherein the abrasive tools are disks, the disks comprising a first set of disks and a second set of disks coupled to the fibrous pad, each disk of the first set of disks including a floor-contacting nominal surface; and wherein each disk of the second set of disks includes a floor-contacting nominal surface; and wherein a characteristic of the second set of disks are different from that of the first set of disks.

Assignees

• Husqvarna Ab

Inventors

• Tchakarov Tchavdar V

Classifications

• B24D13/14 Primary

  acting by the front face · CPC title

• B24B7/18

  for grinding floorings, walls, ceilings or the like (machines or devices for cleaning floorings A47L11/00, A47L13/00) · CPC title

• B24D11/00

  Constructional features of flexible abrasive materials; Special features in the manufacture of such materials · CPC title

• B24B41/047

  Grinding heads for working on plane surfaces · CPC title

• A47L11/4038

  Disk shaped surface treating tools · CPC title