Patent ID: 11957393
Assignee: GLOBUS MEDICAL INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 4:
5. A variable length headless compression screw insertion system comprising:
a compression screw having a bone screw and a compression sleeve coupled to the bone screw, wherein:
the bone screw includes a distal end having a series of bone engaging threads and shaped to be self-drilling and self-tapping, and a proximal end having an external threading threadably received in the compression sleeve, and
the compression sleeve includes a distal end threadably receiving the bone screw and a proximal end having a predefined drive feature and an external threading;

a driver assembly for driving the compression screw into a bone and including:
a sleeve coupler adapted to threadably receive the external threading of the compression sleeve;
a ram driver adapted to be coupled to the sleeve coupler and having a predetermined length such that its distal end is shaped to contact the proximal end of the bone screw to prevent translation of the bone screw relative to the compression sleeve; and
a sleeve driver adapted to be coupled to the sleeve coupler and having a predetermined length such that its distal end has a complementary drive feature that mates with the predefined drive feature of the compression sleeve, the sleeve driver adapted to rotate the compression sleeve relative to the sleeve coupler.