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US 10,702,316 B2Granted
Handling instrument for a bone screw
AssigneeSilony Medical International AG
InventorFrank Heuer
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AssigneeSilony Medical International AG
InventorFrank Heuer
Estimating the term…
The invention relates to a handling instrument for a pedicle screw. The handling instrument is connectable to the pedicle screw in a rigid and rotationally fixed manner. The handling instrument includes a housing part which extends in an axial longitudinal direction and which is tubular or sleeve-shaped in some sections, and a rod part, which is arranged in the outer housing part and which can engage into a tool placement point of the pedicle screw. The housing part has a guide slot, and the rod part has a transverse opening, which extends in a radial direction, in particular in the region of the guide slot of the housing part. A coupling element can be arranged in the transverse opening of the rod part arranged in the housing part, and the coupling element protrudes into the guide slot of the housing part and can be moved in the guide slot in the longitudinal direction in a sliding manner such that the rod part and the housing part can be moved relative to each other in the longitudinal direction while being rotationally fixed to each other by means of the coupling element.
Handling instrument for a bone screw, comprising a threaded shaft and a head, and it being possible to connect the handling instrument to the bone screw in a releasable yet rigid and rotationally fixed manner, such that the threaded shaft of the bone screw can be screwed into a bone by means of the handling instrument, said handling instrument comprising an outer housing part that extends in an axial longitudinal direction, is designed at least in portions in the shape of a tube and comprises a wall, and said handling instrument comprising an inner rod part that is arranged in the outer housing part, the inner rod part being able to engage in a torque-absorbing tool placement point of the bone screw, characterized in that the outer housing part comprises at least one guide slot that extends in the axial longitudinal direction and that passes through a wall of the housing part, in that the inner rod part, in the region of the guide slot of the outer housing part, comprises a transverse opening that extends in the radial direction, and in that a coupling element can be arranged in said transverse opening of the inner rod part arranged in the outer housing part, the coupling element projecting into at least one of the guide slot of the outer housing part or outwards through the guide slot and in both cases being slidable in the longitudinal direction in the guide slot such that the inner rod part and the outer housing part are arranged so as to be shiftable in the axial longitudinal direction relative to one another, but in a rotationally fixed manner on account of the coupling element and such that the rod part can be loaded in the axial longitudinal direction by means of the coupling element, said handling instrument further comprising a locking sleeve comprising an insertion opening for the coupling element can be arranged concentrically between the outer housing part and the inner rod part, and in that the transverse opening in the rod part is an elongate opening that extends in the longitudinal direction, such that the locking sleeve can be shifted in the axial longitudinal direction relative to the rod part and/or housing part by means of the coupling element.
Handling instrument for a bone screw, comprising a threaded shaft and a head, and it being possible to connect the handling instrument to the bone screw in a releasable yet rigid and rotationally fixed manner, such that the threaded shaft of the bone screw can be screwed into a bone by means of the handling instrument, said handling instrument comprising an outer housing part that extends in an axial longitudinal direction, is designed at least in portions in the shape of a tube and comprises a wall, and said handling instrument comprising an inne rod part that is arranged in the outer housing part, the inner rod part being able to engage in a torque-absorbing tool placement point of the bone screw, characterized in that the outer housing part comprises at least one guide slot that extends in the axial longitudinal direction and that passes through a wall of the housing part, in that the inner rod part, in the region of the guide slot of the outer housing part, comprises a transverse opening that extends in the radial direction, and in that a coupling element can be arranged in said transverse opening of the inner rod part arranged in the outer housing part, the coupling element projecting into at least one of the guide slot of the outer housing part or outwards through the guide slot and in both cases being slidable in the longitudinal direction in the guide slot such that the inner rod part and the outer housing part are arranged so as to be shiftable in the axial longitudinal direction relative to one another, but in a rotationally fixed manner on account of the coupling element and such that the rod part can be loaded in the axial longitudinal direction by means of the coupling element, said handling instrument further comprising a toggle lever mechanism is provided on the outer housing part, the toggle lever mechanism comprising a first and a second lever element and the first lever element being connected in an articulated manner to the second lever element via a toggle joint and the first lever element being pivotally supported on the outer housing part and the second lever element being supported on the coupling element, and the toggle joint mechanism being movable from a bent state into a stretched state and vice versa by actuating an operating element, such that by actuating the toggle lever mechanism, the coupling element can be moved in the longitudinal direction distally and proximally relative to the outer housing part.
Dependencies are inferred from the claim text.