Patent ID: 8157619

Claim:
A dynamic tool having a laminar structure, the tool comprising: first and second oppositely disposed layers, wherein each of the first and second layers includes structural surfaces for being supported on a drive assembly, and wherein each of the first and second layers includes working surfaces for supporting at least one working element when the at least one working element is applied to a work piece; an intermediate structure between the first and second layers; a structural insert between the first and second oppositely disposed layers and between first and second ones of the plurality of components, wherein the first and second oppositely disposed layers are substantially circular and planar, and wherein the intermediate structure includes an inner support adjacent the structural surfaces of the first and second layers; wherein the plurality of components includes a plurality of linear elements extending from the inner support away from structural surfaces; wherein the plurality of linear elements include respective arcuate elements adjacent the working surfaces of the first and second layers; and wherein the arcuate elements form a continuous ring adjacent the working surfaces.