Bone anchor housing limiter
AssigneeHighridge Medical, LLC
InventorsTerry Ziemek, David W. Castleman
Life of this patent
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Abstract
A bone anchor system can comprise a fastener, a rod housing and a first directional component configured for connection to the fastener. The fastener can comprise a shaft having a shaft diameter, an anchoring projection on the shaft, and a head at an end of the shaft. The rod housing can be connected to the head of the fastener. The first directional component can comprise a first body portion having a first outer diameter larger than the shaft diameter, a first bore extending through the first body portion, the first bore sized to receive the shaft diameter, and a first locking component extending from the first body portion configured to engage the rod housing to limit movement of the housing.
Claims22
A sleeve of a bone anchor system, the sleeve comprising:
- a sleeve portion;
- a cup portion extending proximally from the sleeve portion, wherein the cup portion has a greater exterior diameter than the sleeve portion, and wherein the cup portion defines an unthreaded cavity that is operable to receive at least a portion of a housing of the bone anchor system;
- and
- a bore extending through the sleeve portion and the cup portion, wherein the bore is sized to receive a shaft of a fastener of the bone anchor system;
- wherein at least a portion of the bore of the sleeve includes threading that is complementary to exterior threading on the shaft of the fastener.
A sleeve of a bone anchor system, the sleeve comprising:
- a sleeve portion;
- a cup portion extending proximally from the sleeve portion, wherein the cup portion has a greater exterior diameter than the sleeve portion, and wherein the cup portion defines an unthreaded cavity that is operable to receive at least a portion of a housing of the bone anchor system;
- and
- a bore extending through the sleeve portion and the cup portion, wherein the bore is sized to receive a shaft of a fastener of the bone anchor system;
- and
- wherein the sleeve portion includes exterior threading, and wherein the cup portion has an exterior surface that is unthreaded.
A bone anchor system, comprising:
- a fastener including a shaft with exterior threading and a head;
- a housing connected to the head of the fastener;
- and
- a sleeve able to receive at least the shaft of the fastener, the sleeve comprising:
- a sleeve portion;
- a cup portion extending from the sleeve portion, the cup portion being more proximal to the housing than the sleeve portion, wherein the cup portion is operable to receive at least a portion of the housing such that the housing is positionable within a cavity defined by non-threaded interior sidewalls of the cup portion;
- and
- a bore extending through the sleeve portion and the cup portion, wherein the bore is sized to receive the shaft of the fastener.
A bone anchor system, comprising:
- a fastener;
- a housing connected to the fastener, the housing having exterior sidewalls defining a first exterior width for the housing;
- and
- a sleeve able to receive the fastener, the sleeve comprising:
- a sleeve portion configured to be threadedly engaged with at least a portion of the fastener;
- a cup portion comprising a bowl portion extending proximally from the sleeve portion, wherein the bowl portion has an exterior rim that defines a second exterior width for the bowl portion that is greater than the first exterior width for the housing, wherein the bowl portion includes an interior surface that is able to engage a corresponding distal surface of the exterior sidewalls of the housing to inhibit pivoting of the housing relative to the fastener;
- and
- a bore extending through the sleeve portion and the bowl portion, wherein the bore is sized to receive the fastener.
Dependencies are inferred from the claim text.