Patent ID: 7316056

Claim:
Method for anchoring to a concrete base a floor attachment assembly that comprises a floor attachment member having top and bottom sides, at least two compressible pads attached to the bottom side of said floor attachment member, and two holes extending through said attachment member, said method comprising the following steps: (1) providing a fastener and sleeve assembly that includes a fastener having a shank with a leading end and a trailing end and a radially-projecting head at said trailing end, and a sleeve having a bottom end and a top end, a radially projecting flange at said top end, an axial bore, and a counterbore for said axial bore at said top end, with said leading end of said shank intruding into said axial bore via said counterbore; (2) inserting said fastener and sleeve assembly into one of said holes with said bottom end of said sleeve projecting below the bottom side of said attachment member and with the head of said fastener disposed above and spaced from the top side of said attachment member; (3) providing a pneumatically powered tool having a nozzle, a hammer bore in said nozzle, and a hammer mounted for reciprocal movement in said hammer bore; (4) inserting said nozzle in said counterbore so that the head of said fastener intrudes into said hammer bore; and (5) operating said tool so that said hammer impacts said fastener head with sufficient force to drive said fastener into said concrete base far enough to cause the head of said fastener to (a) force said flange into tight engagement with said attachment member and (b) anchor said attachment member to said base without compressing said pads.