Patent ID: 9168076
Filing Date: 2015-10-27
Classification: A61B,Y10T

Abstract:
1. A system comprising: a first portion and a second portion proximal to the first portion; wherein the first portion comprises a first shaft extending between a first proximal portion and a first distal portion; wherein the first proximal portion comprises a first base that slides freely over the first shaft and a first head fixed to the first shaft proximal to the first base, wherein first spring is between the first base and the first head, wherein the first base and the first head each have a spring engaging surface; wherein the first base and the first head each have a larger outside diameter than the first shaft; wherein the first base comprises a threaded bone engaging surface opposite the first base spring engaging surface; wherein the second portion comprises a second shaft extending between a second proximal portion and a second distal portion; wherein the second proximal portion comprises a second base fixed to the second shaft, an intermediate component that slides freely over the second shaft proximal to the second base, and a second head fixed to the second shaft proximal to the intermediate component, wherein a second spring is between the second base and the intermediate component, wherein the second base and the intermediate component each comprise a spring engaging surface.