Patent ID: 9480502
Filing Date: 2016-11-01
CPC Classification: A61B

Claim Text:
1. An expandable interspinous fixation device, the device comprising: a first expandable plate, including: a second expandable plate, including: a mechanical actuator linked to at least said first and second inner expansion portions to move said first inner expansion portion relative to said second inner expansion portion when operated; said mechanical actuator including a first gear engaged with teeth on said first and second inner expansion portions, wherein rotation of said first gear moves said first and second inner expansion portions relative to one another; said first gear and the teeth on said first and second inner expansion portions forming a worm drive mechanism; said mechanical actuator further including: wherein the third gear is a worm gear and the third and second gears form a worm drive, wherein rotation of said worm gear results in a linear sliding movement of at least said first and second inner portions.