Patent ID: 11963881
Assignee: WARSAW ORTHOPEDIC, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An expandable spinal implant deployable between a contracted position and an expanded position, comprising:
a superior endplate, the superior endplate including: a first outside surface and a first inside surface opposite the first outside surface, the first outside surface including at least one bone screw relief and the first inside surface including a first plurality of guide walls, a first proximal end and a first distal end opposite the first proximal end, first proximal ramps and first distal ramps disposed opposite the first proximal ramps, and a first lateral surface and a second lateral surface opposite the first lateral surface, the first and second lateral surfaces extending between the first proximal end and the first distal end;
an inferior endplate, the inferior endplate including: a second outside surface and a second inside surface opposite the second outside surface, the second outside surface including at least one bone screw relief and the second inside surface including a second plurality of guide walls, a second proximal end and a second distal end opposite the second proximal end, second proximal ramps and second distal ramps disposed opposite the second proximal ramps, and a third lateral surface and a fourth lateral surface opposite the third lateral surface, the third and fourth lateral surfaces extending between the second proximal end and the second distal end;
an anterior endplate including a plurality of bone screw apertures and a central aperture;
a moving mechanism operably coupled to the anterior endplate, the superior endplate and the inferior endplate, the moving mechanism including: a buttress block and a first trolley and a second trolley disposed on opposite sides of the buttress block, a rotatable first set screw and a rotatable second set screw opposite the first set screw, the first set screw and second set screw being configured to rotate in a first rotation direction and a second rotation direction about a rotation axis projecting in a longitudinal direction of the moving mechanism,
wherein the first trolley is operably coupled to the first set screw and movable toward and away the buttress block in the longitudinal direction of the moving mechanism by rotation of the first set screw along the rotation axis, the second trolley is operably coupled to the second set screw and movable toward and away the buttress block in the longitudinal direction of the moving mechanism by rotation of the second set screw along the rotation axis,
wherein the first trolley includes a first side surface and a second side surface opposite the first side surface and has a first plurality of projections projecting from the first and second side surfaces, the second trolley includes a third side surface and a fourth side surface opposite the third side surface and has a second plurality of projections projecting from the third and fourth side surfaces,
wherein the first and second plurality of projections correspond to a cross sectional shape of the first and second plurality of guide walls and are operably coupled thereto, respectively, such that the first and second plurality of projections move along the first and second plurality of guide walls, respectively,
wherein the moving mechanism is configured to operably adjust a spacing between the superior and inferior endplates upon simultaneous rotation of the first and second set screws along the rotation axis, and
wherein the moving mechanism is configured to operably adjust an angle of inclination between the superior and inferior endplates upon rotating either one of the first set screw and the second set screw along the rotation axis.