US 11,986,398 B2
Expandable implant assembly
Michael S. Butler, St. Charles, IL (US); Madeline Wolters, St. Charles, IL (US); Daniel Predick, West Lafayette, IN (US); and Eugene Shoshtaev, Del Mar, CA (US)
Assigned to Life Spine, Inc., Huntley, IL (US)
Filed by Life Spine, Inc., Huntley, IL (US)
Filed on Jul. 26, 2021, as Appl. No. 17/385,558.
Application 17/385,558 is a continuation of application No. 16/548,134, filed on Aug. 22, 2019, granted, now 11,103,362.
Application 16/548,134 is a continuation of application No. 15/497,044, filed on Apr. 25, 2017, granted, now 10,426,632.
Application 15/497,044 is a continuation in part of application No. 14/714,821, filed on May 18, 2015, granted, now 9,801,733.
Application 14/714,821 is a continuation in part of application No. 13/802,110, filed on Mar. 13, 2013, granted, now 9,034,041.
Prior Publication US 2021/0353427 A1, Nov. 18, 2021
Int. Cl. A61F 2/44 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/447 (2013.01) [A61F 2/446 (2013.01); A61F 2002/3037 (2013.01); A61F 2002/30387 (2013.01); A61F 2002/30405 (2013.01); A61F 2002/30428 (2013.01); A61F 2002/30433 (2013.01); A61F 2002/30471 (2013.01); A61F 2002/30507 (2013.01); A61F 2002/30515 (2013.01); A61F 2002/30538 (2013.01); A61F 2002/30556 (2013.01); A61F 2002/30579 (2013.01); A61F 2002/30784 (2013.01); A61F 2002/30841 (2013.01); A61F 2002/30904 (2013.01); A61F 2310/00017 (2013.01); A61F 2310/00023 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An expandable implant, comprising:
an upper support comprising a top surface configured to engage a first portion of bone;
a lower support comprising a bottom surface configured to engage a second portion of bone;
a control assembly coupled to the upper support and the lower support and configured to control relative movement between the upper support and the lower support, wherein the control assembly comprises:
a control shaft comprising a head, wherein the head of the control shaft comprises a recess in communication with an access port extending from a side of the control shaft to enable delivery of bone growth material via the recess and the access port to an interior of the implant;
a front portion configured to translate along the control shaft and comprising a first ramped surface and a second ramped surface, the first ramped surface configured to slide relative to and provide a first force to the upper support, the second ramped surface configured to slide relative to and provide a second force to the lower support; and
a rear portion longitudinally fixed relative to the control shaft and comprising a third ramped surface and a fourth ramped surface, the third ramped surface configured to slide relative to and provide a third force to the upper support, the fourth ramped surface configured to slide relative to and provide a fourth force to the lower support; and
first and second retaining members extending through the rear portion and engaging a circumferential groove in the head of the control shaft;
wherein rotation of the control shaft causes the front portion to translate along the control shaft and causes the upper support to move relative to the lower support.