Bone screw locking receiver and bone screw system
AssigneeMiRus LLC
InventorDaniel Jobe
Life of this patent
Estimating the term…
Abstract
Various implementations described herein include a screw locking receiver. The screw locking receiver includes a receiver frame which has 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. The receiver frame defines a cylindrical inner channel having a central axis. The receiver includes a counterbore which extends along a first portion of the inner surface. The receiver includes a plurality of threads extending helically about a second portion of the inner surface. The counterbore has a diameter that is sufficient to accept a screw head having a non-parallel central axis with respect to a central axis of the inner channel when in a fastened position.
Claims30
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.
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;
- a first counterbore that extends downwardly from said first surface of said receiver frame to a top portion of said inner surface;
- a second counterbore that extends upwardly from said second surface of said received frame to a second portion of said inner surface;
- and,
- a threaded portion that is positioned between said first and second counter bores;
- said threaded portion includes first and second threads;
- each of said first and second threads extending helically about an intermediate portion of said inner surface each of said first and second threads includes a lead;
- each of said lead of said first and second thread is located at a top of said threaded portion;
- said first and second threads are spaced from one another;
- said lead on said first and second threads are spaced from one another;
- said lead on said first and second threads are positioned diametrically apart from one another about said inner surface.
Dependencies are inferred from the claim text.