Spiral U-blade lag screw
AssigneeStryker European Operations Limited
InventorBernd Simon
Life of this patent
Estimating the term…
Abstract
A lag screw assembly includes a lag screw and a blade. The lag screw includes a shank extending from a proximal end to a distal end along a longitudinal axis, the shank having an outer surface, and the shank having a threaded portion at the distal end. The lag screw further includes a groove formed in the shank and open to the outer surface, the groove extending along the shank between the proximal and distal ends. At least a portion of the groove defines a path that extends around and along the longitudinal axis on the outer surface. The blade has a head and a leg extending therefrom for slidably engaging the groove.
Claims20
A lag screw assembly comprising:
- a lag screw including:
- a shank extending from a proximal end to a distal end along a longitudinal axis, the shank having an outer surface, and the shank having a threaded portion at the distal end;
- a groove formed in the shank and open to the outer surface, the groove extending along the shank between the proximal and distal ends,
- wherein at least a portion of the groove defines a path that extends around and along the longitudinal axis on the outer surface;
- and
- a blade having a head and a leg extending therefrom for slidably engaging the groove, at least a portion of the leg protruding farther in a radial direction than an outer diameter of the threaded portion,
- wherein an outer surface of the leg defines an indentation.
A lag screw assembly comprising:
- a lag screw including:
- a shank extending from a proximal end to a distal end along a longitudinal axis, the shank having an outer surface, and the shank having a threaded portion at the distal end;
- a groove formed in the shank and open to the outer surface, the groove extending along the shank between the proximal and distal ends,
- wherein at least a portion of the groove defines a helical path on the outer surface;
- and
- a blade having a head and a leg extending therefrom for slidably engaging the groove,
- wherein at least a portion of the leg positioned within a portion of the groove defined in the threaded portion protrudes radially beyond an outer diameter of the threaded portion,
- wherein an outer surface of the leg defines an indentation.
A kit for fixation of a bone, comprising:
- a lag screw including:
- a shank extending from a proximal end to a distal end along a longitudinal axis, the shank having an outer surface, and the shank having a threaded portion at the distal end;
- a groove formed in the shank and open to the outer surface, the groove extending along the shank between the proximal and distal ends,
- wherein at least a portion of the groove defines a helical path on the outer surface;
- and
- a blade having a head and a leg extending therefrom for slidably engaging the groove,
- wherein at least a portion of the blade corresponding to the threaded portion of the shank protrudes radially beyond an outer diameter of the threaded portion, and
- wherein an outer surface of the leg defines an indentation.
Dependencies are inferred from the claim text.