US 11,696,836 B2
Lordotic expandable interbody implant
Christopher Stein, Fallbrook, CA (US); and Seth Gustine, Encinitas, CA (US)
Assigned to NuVasive, Inc., San Diego, CA (US)
Filed by NuVasive, Inc., San Diego, CA (US)
Filed on Oct. 29, 2019, as Appl. No. 16/667,766.
Application 16/667,766 is a continuation of application No. 15/799,554, filed on Oct. 31, 2017, granted, now 10,492,924.
Application 15/799,554 is a continuation of application No. 14/456,640, filed on Aug. 11, 2014, granted, now 9,801,734, issued on Oct. 31, 2017.
Claims priority of provisional application 61/864,132, filed on Aug. 9, 2013.
Prior Publication US 2020/0100904 A1, Apr. 2, 2020
Int. Cl. A61F 2/44 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/447 (2013.01) [A61F 2002/30158 (2013.01); A61F 2002/30387 (2013.01); A61F 2002/30471 (2013.01); A61F 2002/30507 (2013.01); A61F 2002/30538 (2013.01); A61F 2002/30904 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An expandable spinal fusion implant, comprising:
a housing having a hollow interior defined by a proximal endwall, a distal endwall, an anterolateral sidewall, and a posterolateral sidewall;
an upper endplate moveably attached to the housing and having a first interior surface including a first ramp, and a lower endplate moveably coupled to the housing and having a second interior surface including a second ramp;
a wedge positioned within the housing between the first interior surface and second interior surface, the wedge including a first surface that engages the first ramp and a second surface that engages the second ramp; and
a drive mechanism configured to drive the wedge moving the upper endplate and the lower endplate from a collapsed configuration to an expanded configuration, with the upper endplate and the lower endplate forming a height which increases across the upper endplate and the lower endplate from a proximal end towards a distal end,
wherein the drive mechanism engages the wedge and the proximal wall of the housing, and wherein the distal wall of the housing is free of the drive mechanism.