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AssigneeNovastep
InventorsAdrien Bousquet, Loïc Girod, Rémi Le Besque
Estimating the term…
The present invention relates to a clamping screw (6) for osteosynthesis, comprising at least one screw thread (7, 10) along a main axis (X) and, at its end referred to as the apex end (11), having a socket (12) which, about said main axis (A), has evenly angularly distributed shapes designed to accept complementing shapes of a screwdriver (19) engaged in said socket (12), notable in that the socket (12) of the screw (6) comprises at least three regular shapes (13) of which the vertices are inscribed inside a circle referred to as circumscribed circle (30) and at least two adjacent vertices of the socket (21) are connected to form a convex lobe referred to as indexing lobe (16) of which the radius of curvature is equal to the radius of the circumscribed circle (30).
A tightening screw for osteosynthesis including at least one thread along a main axis of the tightening screw and at an apical end of the tightening screw a recess having about the main axis angularly distributed regular shapes, which are adapted to receive complementary shapes of a screwdriver engaging in the recess, wherein the recess of the tightening screw includes at least three regular shapes whose vertices are inscribed in a circumscribed circle and at least two adjacent vertices of the recess are connected to form an indexing lobe, the indexing lobe having a radius of curvature that is equal to a radius of the circumscribed circle,
A screwdriver for tightening screws for osteosynthesis, each tightening screw of the tightening screws including at least one thread along a main axis and at an apical end of each tightening screw of the tightening screws a recess having about the main axis angularly distributed regular shapes, which are adapted to receive complementary shapes of the screwdriver engaging in the recess, wherein the recess has a hexalobular shape comprising 6 convex lobes separated by 6 intermediate spaces, the convex lobes having vertices which are inscribed in a circumscribed circle and at least two adjacent vertices of the recess are connected to form an indexing lobe, the indexing lobe having a radius of curvature that is equal to a radius of the circumscribed circle, the screwdriver including a handle secured to a blade and, at a distal end of the blade, a tip having shapes complementary to those of the recess.
Dependencies are inferred from the claim text.