Patent ID: 7815393

Claim:
A mounting assembly for rotatably mounting a tool holding means comprising a tool holder body having first and second surfaces on at least one motor driven rotatable arm of a surface processing apparatus, a surface processing tool mounted on said first surface and an aperture extending through said first and second surfaces, said surface processing tool having an axis substantially parallel to the axis of rotation of said motor driven arm, said tool axis passing through said aperture of said tool holder body, whereby said surface processing tool can spin freely about its axis as said arm is rotatably driven by said motor, said mounting assembly comprising: elongate unitary shank means including an elongate smooth surfaced, generally cylindrical shank portion intermediate the ends of said shank means, said shank means adapted for positioning within said aperture with one end projecting through said second surface of said tool holder body; bearing means supported by said second surface of said tool body, said bearing means having a bore surrounding, in closely adjacent relationship, said smooth surfaced portion of said shank means; said bearing means being rotatable relative to said shank means for rotatably mounting said surface processing tool, whereby said surface processing tool can spin freely about its axis, said bearing means comprising the only bearing means on which said surface processing tool rotates; and elongate mounting means adapted for attachment to said arm, said one end of said elongate shank means including means for non-rotatable attachment to said mounting means.