Patent ID: 9532789
Date: 2017-01-03
CPC Classifications: A61B,B23B,F16D

Claim:
1. A cannulated hammer drill attachment for a cannulated rotary drill having an output member rotatable in a first direction and in a second direction opposite the first direction, wherein the hammer drill attachment comprises: an input shaft configured to receive rotary motion from an output member of the rotary drill in each of the first direction and the second direction; an output shaft configured to output rotary motion or pulsed axial percussions; and a transmission connecting the input shaft with the output shaft, the transmission comprising: a first transmission member disposed in conjunction with the input shaft to receive corresponding rotary motion from the input shaft during rotation of the input shaft in each of the first direction of rotation and the second direction of rotation; and a second transmission member disposed in conjunction with the first transmission member and the output shaft, the second transmission member being configured to: during rotation of the input shaft in the first direction of rotation, transfer the rotary motion of the first transmission member to the output shaft, and during rotation of the input shaft in the second direction of rotation, convert the rotary motion of the first transmission member to pulsed axial percussions and transfer the pulsed axial percussions to the output shaft.