US 11,737,892 B1
Intervertebral spacer with ramped integral expansion mechanism and stepped locking mechanism
Murali Kadaba, Austin, TX (US); Damien Shulock, San Francisco, CA (US); and Dennis Crandall, Mesa, AZ (US)
Assigned to Ingeniumspine, LLC, Phoenix, AZ (US)
Filed by IngeniumSpine, LLC, Phoenix, AZ (US)
Filed on Jan. 18, 2023, as Appl. No. 18/98,567.
Int. Cl. A61F 2/44 (2006.01); A61F 2/46 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/447 (2013.01) [A61F 2/30771 (2013.01); A61F 2/4611 (2013.01); A61F 2002/30176 (2013.01); A61F 2002/30471 (2013.01); A61F 2002/30476 (2013.01); A61F 2002/30518 (2013.01); A61F 2002/30904 (2013.01); A61F 2002/30937 (2013.01); A61F 2002/4615 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An expandable intervertebral spacer system, the spacer system comprising:
a) a top plate and a bottom plate forming a cage that has a proximal end, a distal end, a top, a bottom, and four sides;
b) a first ramp extending into the cage from the top or bottom of the cage;
c) a hinge connecting the top plate and bottom plate at the proximal end;
d) a stanchion at the distal end, the stanchion comprising a movable post having saw teeth and a stationary post having saw teeth; and
e) a torsion spring configured to bias the movable post against the stationary post, such that the movable post and stationary post cooperate to lock the top plate and bottom plate apart a desired distance.