US 12,185,982 B2
External adjustment device for distraction device
Shanbao Cheng, San Diego, CA (US); Michael Moeller, San Diego, CA (US); and Jeffrey Schwardt, San Diego, CA (US)
Assigned to Globus Medical Inc., Audubon, PA (US)
Filed by NuVasive Specialized Orthopedics, Inc., San Diego, CA (US)
Filed on Oct. 18, 2022, as Appl. No. 18/047,449.
Application 18/047,449 is a continuation of application No. 17/066,338, filed on Oct. 8, 2020, granted, now 11,504,162.
Application 17/066,338 is a continuation of application No. 16/004,099, filed on Jun. 8, 2018, granted, now 10,835,290, issued on Nov. 17, 2020.
Application 16/004,099 is a continuation of application No. PCT/US2016/066179, filed on Dec. 12, 2016.
Claims priority of provisional application 62/276,196, filed on Jan. 7, 2016.
Claims priority of provisional application 62/265,430, filed on Dec. 10, 2015.
Prior Publication US 2023/0059518 A1, Feb. 23, 2023
Int. Cl. A61B 17/70 (2006.01); A61B 17/72 (2006.01); H01F 7/02 (2006.01); H01F 7/06 (2006.01); A61B 17/00 (2006.01); A61B 90/00 (2016.01); A61B 90/92 (2016.01); A61B 90/98 (2016.01)
CPC A61B 17/7016 (2013.01) [A61B 17/70 (2013.01); A61B 17/7216 (2013.01); H01F 7/0205 (2013.01); H01F 7/064 (2013.01); A61B 2017/00039 (2013.01); A61B 2017/00057 (2013.01); A61B 2017/00199 (2013.01); A61B 2017/00393 (2013.01); A61B 2017/00398 (2013.01); A61B 90/08 (2016.02); A61B 2090/0811 (2016.02); A61B 90/92 (2016.02); A61B 90/98 (2016.02)] 13 Claims
OG exemplary drawing
 
1. A system comprising:
an implantable actuation device comprising a magnetic element configured to rotate in response to an external magnetic field; and
a controller generating an external magnetic field and rotate the magnetic element of the implantable actuation device, the controller comprising:
a first driver magnet defining a first rotational axis and a first central magnetic axis transverse to the first rotational axis, the first driver magnet having a first north pole at a first end of the first central magnetic axis and a first south pole at a second end of the first central magnetic axis;
a second driver magnet defining a second rotational axis and a second central magnetic axis transverse to the second rotational axis, the second driver magnet having a second north pole at a second end of the second central magnetic axis and a second south pole at a second end of the second central magnetic axis, wherein at least one of the first and second central magnetic axes is oriented at a rotational offset relative to a flux reference point that is equidistant from the first driver magnet and the second driver magnet; and
a drive system configured to generate synchronous rotation of the first and second driver magnets about the first and second rotational axes,
wherein the controller is disposed sufficiently close to the distraction device that the magnetic element of the distraction device is affected by the external magnetic field.