Abrasive disc

Patent metadata

Field	Value
Publication number	US-9914199-B2
Application number	US-201414565201-A
Country	US
Kind code	B2
Filing date	Dec 9, 2014
Priority date	Dec 9, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An abrasive article including a disc including a central axis; a primary outer edge substantially coaxial with the central axis and having a circumferential length, L 1 ; a secondary outer edge substantially coaxial with the central axis and coplanar with the primary outer edge, the secondary outer edge having a circumferential length, L 2 , wherein L 2 is less than L 1 ; and a structurally weakened portion extending substantially adjacent to the secondary outer edge. In an embodiment, the abrasive article further includes a shedable portion configured to rupture the structurally weakened portion when the shedable portion is removed from the abrasive disc. In another aspect, an abrasive article having an initial outer circumferential length, L I , and a length of deliberately exposable circumferential edge surface, L OE , wherein L OE is greater than L I .

First claim

The invention claimed is:

1. An abrasive article comprising:
a disc including:
a central axis;
a primary outer edge substantially coaxial with the central axis and having a circumferential length, L 1 ;
a secondary outer edge substantially coaxial with the central axis and coplanar with the primary outer edge, the secondary outer edge having a circumferential length, L 2 , wherein L 2 is less than L 1 ;
a structurally weakened portion extending substantially adjacent to the secondary outer edge, wherein the structurally weakened portion comprises a plurality of perforations extending fully through the disc in a direction generally parallel to the central axis; and
a shedable portion configured to rupture the structurally weakened portion when the shedable portion is removed from the abrasive disc.

2. The abrasive article according to claim 1 , wherein the disc comprises a non-woven abrasive.

3. The abrasive article according to claim 1 , wherein the structurally weakened portion is coaxial with the central axis of the disc.

4. The abrasive article according to claim 1 , wherein the disc further comprises a tertiary outer edge substantially coaxial with the central axis and coplanar with the second outer edge, the tertiary outer edge having a circumferential length, L 3 , wherein L 3 is less than L 2 .

5. The abrasive article according to claim 4 , wherein the disc further comprises a second structurally weakened portion extending substantially adjacent to the tertiary outer edge.

6. The abrasive article according to claim 5 , wherein the second structurally weakened portion is coaxial with the central axis of the disc.

7. The abrasive article according to claim 5 , wherein the second structurally weakened portion comprises a plurality of perforations extending at least partially through the disc in a direction generally parallel to the central axis.

8. The abrasive article according to claim 5 , further comprising:
a shedable portion configured to rupture the second structurally weakened portion when the shedable portion is removed from the second structurally weakened portion.

9. The abrasive article according to claim 5 , wherein the second structurally weakened portion is configured to remain intact upon application of a torque around the central axis of no less than about 5 Nm.

10. The abrasive article according to claim 1 , wherein the disc further comprises an engagement component disposed at least partially on a surface of the disc.

11. The abrasive article according to claim 1 , wherein the abrasive article comprises a non-woven abrasive.

12. An abrasive article comprising:
a disc including:
a central axis;
a primary outer edge substantially coaxial with the central axis and having a circumferential length, L 1 ;
a secondary outer edge substantially coaxial with the central axis and coplanar with the primary outer edge, the secondary outer edge having a circumferential length, L 2 , wherein L 2 is less than L 1 ;
a tertiary outer edge substantially coaxial with the central axis and coplanar with the second outer edge, the tertiary outer edge having a circumferential length, L 3 , wherein L 3 is less than L 2 , and
a structurally weakened portion extending substantially adjacent to the secondary outer edge, wherein the structurally weakened portion comprises a plurality of perforations extending fully through the disc in a direction generally parallel to the central axis, and
a second structurally weakened portion extending substantially adjacent to the tertiary outer edge.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Vela Godofredo
• Wahl Brian J

Classifications

• B24D7/18

  Wheels of special form · CPC title

• B24D13/142

  Wheels of special form · CPC title

• B24D2203/00

  Tool surfaces formed with a pattern · CPC title

• B24D13/08 Primary

  comprising annular or circular sheets packed side by side · CPC title

• B24D99/005

  Segments of abrasive wheels · CPC title