US 12,303,401 B2
Tritanium AL implants and instrumentation
Christian Karl Schultz, Hoboken, NJ (US); Bryan D. Milz, Florida, NY (US); and Zinoviy Sosnov, Fair Lawn, NJ (US)
Assigned to K2M, Inc., Leesburg, VA (US)
Filed by K2M, Inc., Leesburg, VA (US)
Filed on Mar. 18, 2024, as Appl. No. 18/608,046.
Application 18/608,046 is a continuation of application No. 17/885,773, filed on Aug. 11, 2022, granted, now 11,969,357.
Application 17/885,773 is a continuation of application No. 17/688,176, filed on Mar. 7, 2022, granted, now 11,918,487, issued on Mar. 5, 2024.
Application 17/688,176 is a continuation of application No. 16/775,672, filed on Jan. 29, 2020, granted, now 11,298,244, issued on Apr. 12, 2022.
Claims priority of provisional application 62/799,360, filed on Jan. 31, 2019.
Prior Publication US 2024/0216148 A1, Jul. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/44 (2006.01); A61B 17/17 (2006.01); A61F 2/30 (2006.01); A61F 2/46 (2006.01); B60R 19/02 (2006.01)
CPC A61F 2/447 (2013.01) [A61B 17/1757 (2013.01); A61F 2/30749 (2013.01); A61F 2/442 (2013.01); A61F 2/4611 (2013.01); B60R 19/023 (2013.01); A61F 2002/3049 (2013.01); A61F 2002/30593 (2013.01); A61F 2002/30784 (2013.01); A61F 2310/00023 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An intervertebral spacer assembly comprising:
an intervertebral spacer having a superior surface configured to engage a superior vertebral body, an inferior surface configured to engage an inferior vertebral body, and a proximal surface comprising a first fastener channel oriented to pass through the proximal and superior surfaces of the intervertebral spacer at a first angle, a second fastener channel oriented to pass through the proximal and inferior surfaces of the intervertebral spacer at a second angle; and a locking member channel intermediate the first and second fastener channels, the locking member channel including an inner wall, an annular ridge formed in the inner wall, a first pair of recesses formed in the inner wall, and a second pair of recesses formed in the inner wall and angularly offset from the first pair of recesses; and
a locking member comprising:
a first anti-backout member;
a second anti-backout member; and
a collet having an annular flange configured to be retained by the annular ridge of the locking member channel in order to rotatably couple the locking member to the intervertebral spacer; a first stop protrusion projecting outwardly from a first side of a peripheral wall, and a second stop protrusion projecting from a second side of the peripheral wall so that the locking member is rotatable within the locking member channel between two stable positions comprising an unlocked position and a locked position, such that in the unlocked position, the first and second stop protrusions protrude into the first pair of recesses in order to retain the locking member in the unlocked position, and the first and second anti-backout members do not obstruct the first and second fastener channels; and in the locked position, the first and second stop protrusions protrude into the second pair of recesses in order to retain the locking member in the locked position, and the first and second anti-backout members obstruct the first and second fastener channels in order to prevent the first and second fasteners from backing out of the first and second fastener channels.