Carrier plate holding an abrading element and abrading plate

1. A carrier plate detachably mounted on a rotatably mounted abrading plate driven during use to abrade stone or concrete floors, the carrier plate comprising:

a top surface having a first edge shorter than an opposing second edge;

at least one abrading element affixed to the top surface;

a first side arranged on a third edge of the top surface;

a second side arranged on a fourth edge of the top surface, the fourth edge opposing the third edge; and

two flanges, each flange arranged on a respective one of the first and second sides to surround a shoulder arranged on the abrading plate,

wherein the shoulder has side edges that are undercut to correspond to the two flanges so that the carrier plate can be fixed on the abrading plate with an engagement based only on form and friction,

wherein the third and fourth edges, as seen in a plane defined by the top surface, form an acute angle with each other, and

wherein transitions between the plane defined by the top surface and respective planes containing outwardly facing surfaces of the flanges are rounded so that the flanges are curved about a respective imaginary axis parallel to the respective side edge of the carrier.

2. The carrier plate according to claim 1 , wherein the carrier plate can be fixed on the abrading plate by movement in a direction away from an abrading plate center.

3. The carrier plate according to claim 1 , wherein the carrier plate includes a mounting face on which the abrading element is arranged, a surface area of the mounting face being greater than a cross-sectional area of a surface of the abrading element that is parallel to the mounting face.

4. The carrier plate according to claim 1 , wherein the carrier plate includes a mounting face on which the abrading element is arranged, said mounting face being at least partially exposed.

5. The carrier plate according to claim 1 , wherein the carrier plate carries at least two abrading elements spaced apart.

6. An abrading plate rotatably mounted and driven during use to abrade stone or concrete floors, the abrading plate having at least one carrier plate detachably mounted thereon, the carrier plate having at least one abrading element, the abrading plate comprising:

at least one undercut shoulder, each undercut shoulder including a first side arranged to form an acute angle with respect to a second side, the acute angle being bisected by a line from the center of the abrading plate to the edge of the abrading plate, each undercut shoulder being provided to engage with flanges arranged on the carrier plate so that the carrier plate, by surrounding engagement, can be fixed on the abrading plate based on form and friction without fasteners.

7. The abrading plate according to claim 6 , wherein the shoulder is formed by a radial groove produced in the abrading plate.

8. The abrading plate according to claim 6 , wherein the shoulder forms a protrusion projecting from a surface of the abrading plate parallel to a plane of rotation.

9. An abrading device rotatably mounted and driven during use to abrade stone or concrete floors, comprising:

a carrier plate to hold at least one abrading element for abrading stone or concrete floors, the carrier plate including,

a top surface having a first edge shorter than an opposing second edge,

at least one abrading element affixed to the top surface,

a first side arranged on a third edge of the top surface,

a second side arranged on a fourth edge of the top surface, the fourth edge opposing the third edge, and

two flanges, each flange arranged on a respective one of the first and second sides, to surround a shoulder arranged on the abrading plate; and

an abrading plate having an undercut shoulder including two sides, one side forming an acute angle with respect to the other side, the acute angle being bisected by a line from a center of the abrading plate to an edge of the abrading plate,

wherein the undercut shoulder is provided to engage the flanges of the carrier plate so that the carrier plate, by surrounding engagement, can be detachably mounted on the abrading plate with an engagement based only on form and friction.

10. A system for abrading stone or concrete floors comprising:

a carrier plate to hold at least one abrading element for abrading the stone or concrete floors, the carrier plate including,

a top surface having a first edge shorter than an opposing second edge,

at least one abrading element affixed to the top surface,

a first side arranged on a third edge of the top surface,

a second side arranged on a fourth edge of the top surface, the fourth edge opposing the third edge, and

two flanges, each flange arranged on a respective one of the first and second sides, to surround a shoulder arranged on the abrading plate;

an abrading plate having an undercut shoulder including two sides, one side forming an acute angle with respect to the other side, the acute angle being bisected by a line from a center of the abrading plate to an edge of the abrading plate, the undercut shoulder engaging the flanges of the carrier plate so that the carrier plate, by surrounding engagement, can be detachably mounted on the abrading plate with an engagement based only on form and friction; and

a machine having the abrading plate mounted thereon, the machine including a motor to rotate the abrading plate to abrade the stone or concrete floor.

11. A method of abrading a stone or concrete floor, comprising:

providing a carrier plate to hold at least one abrading element for abrading the stone or concrete floors, the carrier plate including,

a top surface having a first edge shorter than an opposing second edge,

at least one abrading element affixed to the top surface,

a first side arranged on a third edge of the top surface,

a second side arranged on a fourth edge of the top surface, the fourth edge opposing the third edge, and

two flanges, each flange arranged on a respective one of the first and second sides, to surround a shoulder arranged on the abrading plate;

detachably mounting the carrier plate on an abrading plate having an undercut shoulder including two sides, one side forming an acute angle with respect to the other side, the acute angle being bisected by a line from a center of the abrading plate to an edge of the abrading plate, the undercut shoulder engaging the flanges of the carrier plate an engagement based only on form and friction;

rotating the abrading plate with the carrier plate mounted thereon over the stone or concrete floor; and

driving the abrading plate across the stone or concrete floor while rotating to abrade the stone or concrete floor.

12. The carrier plate according to claim 1 , wherein the top surface extends beyond the at least one abrading element in a radial direction with respect to the abrading plate.

13. The carrier plate according to claim 12 , wherein the top surface extends beyond the at least one abrading element in an inward radial direction relative to the abrading plate.

14. The carrier plate according to claim 13 , wherein the top surface extends beyond the at least one abrading element in an outward radial direction relative to the abrading plate.

15. The carrier plate according to claim 1 , wherein the at least one abrading element is spaced at a predetermined distance from both the first and second edges.