Locking pin or screw device for an osteosynthesis plate or for the coaptation of bone fragments
AssigneesDepuy France, Pied Innovation
InventorsChristian Augagneur, Marc Augoyard, Michel Benichou
Life of this patent
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Abstract
A one piece pin, adapted to be driven by a motor, includes a threaded rod having a self drilling end at one end of the threads of the rod. The self drilling end includes a transversely positioned flat portion integral with the rod having a drilling edge with a point. A flat head is formed on the rod at the opposite end of the threads, the head having a pair of diametrically opposite notches which permit the head to be grasped by a tool. A divisible shank is attached to the heads by a zone of reduced resistance to rupture torque.
Claims13
A one piece pin for surgical use adapted to be driven by a motor unit, said pin comprising:
- a threaded rod with a self-drilling end spaced from one end of the threads of said rod, said self-drilling end including a transversely positioned flat portion integral with said rod, said flat portion having a drilling edge with a point separating two faces which form an obtuse angle, said faces being arranged symmetrically with respect to said rod;
- a flat head on said rod spaced from an opposite end of said threads, said head having a pair of peripheral, axial, and diametrically opposite notches which constitute a structure which permits the grasping of said head of said pin by a tool having a corresponding shape;
- and
- a shank which is divisibly attached to said head by a zone of reduced resistance to rupture torque, said shank being adapted for engagement in a chuck.
Dependencies are inferred from the claim text.