Patent ID: 8668557

Claim:
An optical grade surfacing tool, comprising: a rigid support having a transverse end surface; an elastically compressible interface attached to the rigid support, the elastically compressible interface including a central part which is in line with the end surface of the rigid support, and a peripheral part that is disposed transversely beyond the end surface of the rigid support; a flexible pad configured to be pressed against a surface to be worked, attached to the interface on the opposite side to the rigid support, the flexible pad including a central part that is in line with the end surface of the rigid support, and a peripheral part that is disposed transversely beyond the end surface of the rigid support; and return spring means disposed between the rigid support and the peripheral part of the interface, the return spring means including a plurality of pairs of superposed elastically flexible blades that project transversely from the rigid support, a first of the blades having a distal portion cooperating in bearing engagement, through a first face, exclusively with the peripheral part of the interface, and a second of the blades cooperating in bearing engagement with the first blade exclusively via a second face of the distal portion on the opposite side to the first face, wherein the combination of the peripheral part of the pad, the peripheral part of the interface, and the return spring means forming means for stabilizing the tool during surfacing, the tool being configured to perform surfacing essentially in the central part of the pad.