Patent ID: 7096972
Filing Date: 2006-08-29
Classification: B25D

Abstract:
1. A hammer drill attachment comprising: a hammer drill, a tool element, and a chuck; a cylindrical body having a first opening extending to a second opening forming an inner portion; a rim positioned at said second opening of said body and extending substantially within said inner portion; said tool element having a shank and a working end, wherein said shank is positioned within said first opening of said body and extending substantially within said inner portion; a cylindrical drill member with a base end and a shaft, wherein said base end has a substantially larger cylindrical diameter than said shaft; said base end is positioned within said second opening of said body and extending substantially within said inner portion, said shaft is positioned within said chuck of said hammer drill; said drill member longitudinally oscillates along a rotational axis through said inner portion from a first position and a second position, wherein said base end of said drill member momentarily and directly abuts said shank of said tool element at said second position and said base end of said drill member momentarily abuts said rim at said first position, wherein said rim retains said base end within said inner portion for preventing rotation of said tool element with respect to said body when said hammer drill is operating in a rotation-hammer mode.