Patent ID: 6523214
Filing Date: 2003-02-25
Classification: B24B,B24D

Abstract:
An assembly for demountably attaching a rotary finishing tool to the rotary drive spindle of a power tool, said assembly comprising: a backing disc having a rear face and a generally planar front face to which is attached the rotary finishing tool; a drive hub attached to the drive spindle for rotation therewith, said hub having an annular backing plate defining a front mounting face; and, a connector subassembly including a first connector piece on the rear face of the backing disc and a second connector piece on the front face of the backing plate, said connector pieces having complementary positive locking surfaces and complementary driving surfaces which respectively interengage in response to linear coaxial movement along their rotational axes of the backing disc into engagement with the backing plate;wherein said first connector piece comprises a sleeve forming an integral unitary extension of said backing disc and having its center axis coaxial with said backing disc and a plurality of oppositely disposed locking openings in said sleeve, and wherein said second connector piece comprises a plurality of oppositely disposed locking projections resiliently biased into said locking openings and manually retractable against said resilient bias from said locking openings; and, wherein said sleeve is annular in shape and further comprising a pair of diametrically opposite driving slots in said sleeve positioned circumferentially spaced from said locking openings, said second connector piece comprising a pair of diametrically opposite driving projections circumferentially positioned to lie in and engage said driving slots when said locking projections are aligned with said locking openings.