Patent ID: 9370372
Filing Date: 2016-06-21
CPC Classification: A61B

Claim Text:
1. A drill bit assembly for use with a drill having a displacement sensor for outputting a signal representative of a displacement of the drill with respect to a reference point, comprising: a drill bit having a leading edge disposed at a distal end of the drill bit and a shank disposed adjacent a proximal end of the drill bit, the drill bit having a cylindrical member extending between the distal end and the shank, wherein the shank is adapted for engagement with a chuck of a drill, and wherein the cylindrical member extends along an axis of rotation about which the cylindrical member rotates during drilling; a bushing having an aperture sized to receive at least a portion of the cylindrical member through the aperture, wherein the bushing is constrainedly moveable relative to the cylindrical member in a direction along the axis of rotation; and an engagement member comprising a cylindrical post extending from the bushing perpendicularly to the axis of rotation for engagement with a bore formed in a displacement sensing arm of the displacement sensor to provide a cylindrical interface therebetween such that the bushing and the drill bit are rotatable relative to the displacement sensing arm perpendicularly to the axis of rotation when the post is engaged with the displacement sensing arm prior to engagement of the shank of the drill bit with the chuck of the drill to facilitate alignment of the drill bit with the chuck of the drill, wherein the engagement member is engageable with the displacement sensing arm for corresponding movement between the bushing and the displacement sensing arm to facilitate sensing of the corresponding movement by the displacement sensor.