US Patent 11851894 Mounting adapter for concrete surface processing tools

A mounting adapter for rotatably mounting a tool holding body having first and second surfaces on at least one spider arm of a motor driven rotatable spider assembly of a surface processing apparatus. The mounting adapter includes a disc with a flex pad dimensioned to rest on a portion of the disc upper surface between a disc aperture and a disc rib. A drive ring has an inner periphery which mechanically engages an outer periphery of the disc.