Bone plate and bone screw guide mechanism
OwnerRobert S. Brayinventor
Life of this patent
Estimating the term…
Abstract
A bone plate comprises a base plate having at least two screw holes and at least two bone screws capable of securing the bone plate to a bone by insertion through the screw holes into the bone. The bone screws have heads shaped to toggle within the screw holes. A retaining plate is provided that is fixedly attachable to the base plate. The retaining plate covers at least a portion of each of the bone screws. The retaining plate and base plate each contain set screw apertures. A set screw is provided to retain the retaining plate in place over the base plate by screwing the set screw through the set screw apertures in the retaining plate and base plate. This design prevents the bone screw from backing out from the bone once screwed in through the base plate.
Claims31
A bone plate comprising:
- a base plate having at least two screw holes;
- at least two bone screws capable of securing the bone plate to a bone by insertion through the screw holes into the bone, wherein the bone screws have heads shaped to toggle within the screw holes;
- and
- a bone screw locking means capable of securedly covering the bone screws so that the bone screws cannot back out from the bone once screwed in through the base plate;
- wherein the bone screws and bone screw locking means are designed such that when the bone screw locking means covers the bone screws and is fixedly attached to said base plate, the top of each bone screw mates with the bone screw locking means and each bone screw can toggle within its corresponding screw hole.
A bone plate comprising
- a base plate having two screw holes and a set screw hole between the screw holes;
- two bone screws capable of securing the bone plate to a bone by insertion through the screw holes into the bone;
- a retaining plate fixedly attachable to the base plate, wherein the retaining plate has a size sufficient to cover the bone screws and a set screw aperture extending therethrough so that the set screw aperture is aligned with the set screw hole in the base plate when the retaining plate is placed on the base plate;
- and
- a set screw for fixedly attaching the retaining plate to the base plate by extending through the set screw aperture in the retaining plate and into the set screw hole in the base plate;
- wherein the bone screws and retaining plate are designed such that, when the retaining plate covers the bone screws the top of each bone screw mates with the retaining plate and the covered bone screws can toggle within the screw holes.
A bone plate comprising
- a base plate having two screw holes, a set screw hole between the screw holes and at least two raised edges;
- two bone screws capable of securing the base plate to a bone by insertion through the screw holes into the bone wherein each bone screw is adapted to toggle within each screw hole;
- a retaining plate fixedly attachable to the base plate, wherein the retaining plate has a size sufficient to cover the bone screws and fit within the at least two raised edges, and wherein the retaining plate includes a set screw aperture extending therethrough so that the set screw aperture is aligned with the set screw hole in the base plate when the retaining plate is placed on the base plate;
- and
- a set screw for fixedly attaching the retaining plate to the base plate by extending through the set screw aperture in the retaining plate and into the set screw hole in the base plate.
Dependencies are inferred from the claim text.