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US 2013/0085532 A1Published application
Spinal plate assembly
AssigneeBeacon Biomedical, LLC
InventorsChris Goodman, Dale Mitchell, Tawney Schwarz
Life of this patent
Estimating the term…
Abstract
The present invention is directed to implantable devices for stabilizing or fusing bone structures within the spine. More specifically, the present invention is a spinal plate assembly that includes an automatic mechanism for blocking the pathway of a bone fastener once inserted to prevent unwanted backwards migration of the bone screw.
Claims19
A spinal plate assembly comprising:
- a spinal plate, said spinal plate including a bottom surface, a top surface, a pair of side surfaces and a pair of end surfaces, at least two bores extending through said top and said bottom surfaces, each of said bores sized for passage of a bone screw, each of said bores including a counterbore extending downwardly from said top surface, said counterbore sized and shaped to substantially contain a head portion of said bone screw, a segmented T-slot extending between said pair of end surfaces and substantially parallel to said top surface, said T-slot extending through said top surface and into each said counterbore along first and second side surfaces thereof, at least one anchor pocket extending downward from said top surface, said anchor pocket having a pair of anchor pocket side walls,
- a locking member constructed and arranged to fit substantially within said T-slot, said locking member including a central base portion, at least one leaf spring extending outwardly therefrom in a first direction, a blade portion secured to a distal end of said leaf spring to contact said first side wall of said T-slot whereby said blade portion extends into at least one said counterbore, at least one anchor portion extending outwardly from said base portion in a direction different from said leaf spring, said at least one anchor portion terminating in an anchor foot, said anchor foot being constructed and arranged to fit into said at least one anchor pocket and cooperate with said pair of anchor pocket side walls to prevent movement of said locking member during movement of said blade portion away from said first side wall of said T-slot.
A spinal plate kit comprising:
- a spinal plate, said spinal plate including a bottom surface, a top surface, a pair of side surfaces and a pair of end surfaces, at least two bores extending through said top and said bottom surfaces, each of said bores sized for passage of a bone screw, each of said bores including a counterbore extending downwardly from said top surface, said counterbore sized and shaped to substantially contain a head portion of said bone screw, a T-slot extending between said pair of end surfaces and substantially parallel to said top surface, said T-slot extending through said top surface and into each said counterbore along first and second side surfaces thereof, at least one anchor pocket extending downward from said top surface, said anchor pocket having a pair of anchor pocket side walls,
- a locking member constructed and arranged to fit substantially within said T-slot, said locking member including a central base portion, at least one leaf spring extending outwardly therefrom in a first direction, a blade portion secured to a distal end of said leaf spring to contact said first side wall of said T-slot whereby said blade portion extends into at least one said counterbore, at least one anchor portion extending outwardly from said base portion in a direction different from said leaf spring, said at least one anchor portion terminating in an anchor foot, said anchor foot being constructed and arranged to fit into said at least one anchor pocket and cooperate with said pair of anchor pocket side walls to prevent movement of said locking member during movement of said blade portion away from said first side wall of said T-slot;
- a pair of bone screws, each said bone screw including a shank portion and a head portion, said shank portion including helical threads constructed and arranged to cooperate with a bone structure, said head portion being larger in diameter that said shank portion, said head portion sized to fit into said counterbore.
Dependencies are inferred from the claim text.