Back to results
US 10,206,716 B2Granted
Bone anchor closure flange form guide and advancement structure with controlled splay
AssigneeRoger P. Jackson
InventorsRoger P. Jackson, James L. Surber
Life of this patent
Estimating the term…
Abstract
Open implant closure structures include a helically wound guide and advancement flange form having pivot-splay accommodating and splay control surfaces with opposing load flanks in initial non-parallel relation.
Claims10
A spinal fixation assembly comprising:
- a closure having a body;
- a closure flange form extending helically about a central axis of the body of the closure;
- a receiver having a first upright arm and a second upright arm;
- a channel formed between the first upright arm and the second upright arm;
- a receiver flange form extending discontinuously along inner surfaces of the first upright arm and the second upright arm of the receiver;
- a closure splay control ramp included in the closure flange form;
- and
- a receiver splay control ramp included in the receiver flange form and configured to engage the closure splay control ramp, engagement of the closure flange form and the receiver flange form generating a controlled splay during a rotational mating of the closure within the receiver, the controlled splay generating an outward splay of the first upright arm and the second upright arm and reducing torque of the closure during loading of the closure into the receiver, the controlled splay arresting the outward splay of the first upright arm and the second upright arm when the closure is in a locking engagement with the receiver.
5 more elements
A spinal fixation assembly comprising:
- a closure having a body;
- a closure flange form extending helically about a central axis of the body of the closure;
- a receiver having a first upright arm and a second upright arm;
- a channel formed between the first upright arm and the second upright arm;
- a receiver flange form extending discontinuously along inner surfaces of the first upright arm and the second upright arm of the receiver;
- a closure splay control ramp included in the closure flange form;
- and
- a receiver splay control ramp included in the receiver flange form and configured to engage the closure splay control ramp, a spacing between the closure splay control ramp and the receiver splay control ramp generating a controlled splay allowance during a rotational mating of the closure within the receiver, the controlled splay allowance generating an outward splay of the first upright arm and the second upright arm, reducing torque, and increasing thrust of the closure during loading of the closure into the receiver, the controlled splay allowance arresting the outward splay of the first upright arm and the second upright arm when a locking thrust is generated within the receiver.
5 more elements
Dependencies are inferred from the claim text.