Patent ID: 8216243

Claim:
A device for manipulating bone fragments, comprising: a bone screw having a front end having a first threaded portion, a rear end having a second threaded portion, an unthreaded middle portion, and a longitudinal axis; an installation instrument having a distal portion with an inner threaded portion configured to threadedly engage the second threaded portion of the bone screw; and a driving tool substantially coaxial with the distal portion and rigidly attached to a locking collar, the driving tool including an engaging portion at a distal end thereof structured to engage a corresponding receiving portion of the bone screw to rotate the bone screw; wherein the installation instrument further comprises a locking component movable from a first configuration in which the locking component is non-rotatably engaged with the locking collar to prevent rotation of the driving tool relative to the installation instrument and a second configuration in which the locking component and locking collar are disengaged from one another to permit rotation of the driving tool relative to the installation instrument to disengage the bone screw from the inner threaded portion of the distal portion of the installation instrument.