US 12,256,968 B2
Variable pitch tapered compressing screw for dynamic compression
Terrence Chadwick Smith, Portland, OR (US)
Assigned to Acumed LLC, Hillsboro, OR (US)
Filed by Acumed LLC, Hillsboro, OR (US)
Filed on Nov. 9, 2021, as Appl. No. 17/522,289.
Claims priority of provisional application 63/112,425, filed on Nov. 11, 2020.
Prior Publication US 2022/0142691 A1, May 12, 2022
Int. Cl. A61B 17/86 (2006.01); A61B 17/68 (2006.01)
CPC A61B 17/8685 (2013.01) [A61B 17/863 (2013.01); A61B 2017/681 (2013.01); A61B 2017/8655 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bone screw comprising:
a leading component including a first exteriorly threaded region and a second exteriorly threaded region;
a trailing component including a third exteriorly threaded region; and
a resilient component positioned around a portion of the leading component and within the trailing component,
wherein a first end of the resilient component is fixedly attached to one of the leading component or the trailing component when the resilient component is in each of a compressed state and a non-compressed state so that the resilient component rotates with the one of the leading component or the trailing component when only the one of the leading component or the trailing component is rotated relative to the other of the leading component or the trailing component, but does not rotate with the other of the leading component or the trailing component when only the other of the leading component or the trailing component is rotated relative to the one of the leading component or the trailing component, and wherein the other of the leading component or the trailing component comprises a ridge in contact with, but not fixedly attached to a second end of the resilient component when the resilient component is in the compressed state, which allows each of the leading component and the trailing component to rotate relative to one another without twisting the resilient component,
wherein the ridge is configured to prevent axial movement in at least one direction of the second end of the resilient component relative to the other of the leading component or the trailing component,
wherein the resilient component is configured to be longitudinally compressed between the leading component and the trailing component and between the first end and the second end.