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US 12,746,130 B2Granted
Auto-locking expandable corpectomy column
AssigneeAstura Medical Inc.
InventorsRoss Dusterhoft, Thomas Purcell
Life of this patent
Estimating the term…
Abstract
A vertebral body replacement system that includes an auto-locking system that is easy to use without additional instrumentation.
Claims21
An expandable column with an auto-locking feature comprising:
- a body having a central opening with a body axial translation feature;
- multiple springs coupled to the body within the central opening;
- a threaded column configured to slidingly fit into the central opening of the body, the threaded column having a column axial translation feature configured to engage the body axial translation feature to allow axial translation of the threaded column;
- and
- a drive gear threaded onto the threaded column and coupled to the body, the drive gear having a spring engagement feature configured to engage with the multiple springs;
- wherein the spring engagement feature is a drive gear track with a plurality of radial cut outs or pockets having a gradual ramped wall and steep angled wall, and the multiple springs are cantilevered springs configure to engage the drive gear track during rotation;
- wherein the multiple springs are used to regulate directional rotation of the drive gear, allowing rotation in a first direction and resisting rotation in a second direction to lock the threaded column.
4 more elements
An expandable column with an auto-locking feature comprising:
- a body having a central opening with a body axial translation feature;
- multiple springs coupled to the body within the central opening;
- a threaded column configured to slidingly fit into the central opening of the body, the threaded column having a column axial translation feature configured to engage the body axial translation feature to allow axial translation of the threaded column;
- and
- a drive gear threaded onto the threaded column and coupled to the body, the drive gear having a spring engagement feature configured to engage with the multiple springs;
- wherein the spring engagement feature is a drive gear track with flat surfaces and the multiple springs are mounted horizontally in the body with a flexible center portion, the flexible central portion flexing outward at a high point between the flat surfaces and then flex inward at the flat surface;
- wherein the multiple springs are used to regulate directional rotation of the drive gear, allowing rotation in a first direction and resisting rotation in a second direction to lock the threaded column.
4 more elements
An expandable column with an auto-locking feature comprising:
- a body having a central opening with a body axial translation feature;
- multiple springs coupled to the body within the central opening;
- a threaded column configured to slidingly fit into the central opening of the body, the threaded column having a column axial translation feature configured to engage the body axial translation feature to allow axial translation of the threaded column;
- and
- a drive gear threaded onto the threaded column and coupled to the body, the drive gear having a drive gear track configured to engage with the multiple springs;
- wherein the drive gear track includes a plurality of radial cut outs or pockets having a gradual ramped wall and steep angled wall, and the multiple springs are cantilevered springs configured to engage the drive gear track during rotation.
3 more elements
An expandable column with an auto-locking feature comprising:
- a body having a central opening;
- multiple springs having a lower portion pressed into spring holes in the body with a cantilevered upper portion;
- a threaded column axially coupled to the body;
- and
- a drive gear having a drive gear track rotatingly coupled to the body and the threaded column, the drive gear being configured to rotate and translate the threaded column axially up or down, the drive gear track having a plurality of radial cut outs or pockets with a gradual ramped wall and steep angled wall;
- wherein the cantilevered upper portion of the springs are configured to engage the drive gear track, wherein rotation in a first direction translates the cantilevered upper portion along the gradual ramped wall, and rotation in a second direction translate s the cantilevered upper portion into the steep angled wall locking the cantilevered upper portion and preventing further rotation.
3 more elements
Dependencies are inferred from the claim text.