Fastening devices, systems, and methods
AssigneeRTG Scientific, LLC
InventorsRichard Justin Hyer, Jonathan Bitter
Life of this patent
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Abstract
A process of forming a fastener with improved threading to resist multi-axial forces and off-axis loading scenarios is provided. The process may include placing first and second mill tools adjacent a shaft of the fastener having a proximal end and a distal end, rotating the shaft and the first and second mill tools, and translating the first and second mill tools along at least part of a length of the shaft to form: a first concave undercut surface oriented toward the proximal end, a first convex undercut surface oriented toward the distal end, a second concave undercut surface oriented toward the distal end, and a second convex undercut surface oriented toward the proximal end.
Claims20
A process for forming a fastener comprising:
- placing a first cutting head of a first mill tool at a first position along a substantially cylindrical substrate having a proximal end and a distal end;
- placing a second cutting head of a second mill tool at a second position along the substantially cylindrical substrate;
- rotating the first cutting head about a first longitudinal axis of the first mill tool;
- rotating the second cutting head about a second longitudinal axis of the second mill tool;
- rotating the substantially cylindrical substrate about a third longitudinal axis of the substantially cylindrical substrate;
- translating the first and second cutting heads along at least part of a length of the substantially cylindrical substrate to form:
- a first concave undercut surface oriented toward the proximal end;
- a first convex undercut surface oriented toward the distal end;
- a second concave undercut surface oriented toward the distal end;
- and
- a second convex undercut surface oriented toward the proximal end.
A fastener formed by a process comprising:
- placing a first cutting head of a first mill tool at a first position along a shaft of the fastener having a proximal end and a distal end;
- placing a second cutting head of a second mill tool at a second position along the shaft;
- rotating the first cutting head about a first longitudinal axis of the first mill tool;
- rotating the second cutting head about a second longitudinal axis of the second mill tool;
- rotating the shaft about a third longitudinal axis of the shaft;
- translating the first and second cutting heads along at least a part of a length of the shaft to form:
- a first concave undercut surface oriented toward the proximal end;
- a first convex undercut surface oriented toward the distal end;
- a second concave undercut surface oriented toward the distal end;
- and
- a second convex undercut surface oriented toward the proximal end.
An implantable bone anchor formed by a process comprising:
- placing a first cutting head of a first mill tool at a first position along a shaft of the implantable bone anchor having a proximal end and a distal end;
- placing a second cutting head of a second mill tool at a second position along the shaft;
- rotating the first cutting head about a first longitudinal axis of the first mill tool;
- rotating the second cutting head about a second longitudinal axis of the second mill tool;
- rotating the shaft about a third longitudinal axis of the shaft;
- translating the first and second cutting heads along at least a part of a length of the shaft to form:
- a first proximally-oriented surface facing toward a proximal end of the shaft;
- a first distally-oriented surface facing toward a distal end of the shaft;
- a second proximally-oriented surface facing toward the proximal end of the shaft;
- and
- a second distally-oriented surface facing toward the distal end of the shaft.
Dependencies are inferred from the claim text.