US 12,440,253 B2
Bone screw locking receiver and bone screw system
Daniel Jobe, Marietta, GA (US)
Assigned to MiRus LLC, Marietta, GA (US)
Filed by MIRUS LLC, Marietta, GA (US)
Filed on Dec. 29, 2021, as Appl. No. 17/564,692.
Claims priority of provisional application 63/132,714, filed on Dec. 31, 2020.
Prior Publication US 2022/0202455 A1, Jun. 30, 2022
Int. Cl. A61B 17/80 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/8057 (2013.01) [A61B 17/8605 (2013.01); A61B 17/8033 (2013.01); A61B 17/8038 (2013.01); A61B 17/8042 (2013.01); A61B 17/8047 (2013.01); A61B 17/8052 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A screw locking receiver comprising:
a receiver frame having a first surface, a second surface opposite and spaced apart from the first surface, and an inner surface which extends between the first surface and the second surface and defines a cylindrical inner channel having a central axis;
wherein a cylindrically shaped top counterbore extends along a first portion of the inner surface and has a uniform diameter along a majority of the longitudinal length of the top counterbore; the top counterbore has a top opening that extends to the first surface; a bottom surface of the top counterbore is spaced upwardly from the second surface;
wherein a threaded region that extends helically about at least a portion of a second portion of the inner surface; a top of the threaded region terminates at the bottom surface of the top counterbore;
wherein said diameter of the top counterbore is sufficient to accept a screw head having a non-parallel central axis with respect to the central axis of the inner channel when in a fastened position;
a maximum diameter of the threaded portion is less than the diameter of the top counterbore;
wherein a depth of the top counterbore is sufficient to a) provide a flush surface between the first surface and a top portion of the screw head that is positioned furthest from the second surface when the screw is in the fastened position and a longitudinal axis is parallel to a central axis of the top counterbore, or b) a top portion of the screw is spaced downwardly from the first surface when the screw is in the fastened position and a longitudinal axis is parallel to a central axis of the top counterbore;
wherein the threaded region includes first and second threads; the first and second threads are each helically shaped; the first and second threads are spaced from one another; a lead of each of the first and second threads starts at the top of the threaded region; the lead of the first and second threads are spaced from one another; and
wherein said lead on said first and second threads are positioned diametrically apart from one another about said inner surface.