Patent ID: 8303374

Claim:
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.