Patent ID: 9649116
Date: 2017-05-16
CPC Classifications: A61B

Claim:
1. A medical device for treating a vertebral body by mechanically displacing cancellous bone, the medical device comprising: a handle including an actuator mechanism; a shaft coupled to the handle, the shaft having an axis and comprising a plurality of concentric sleeves with distal portions, each sleeve configured with a respective series of substantially radially-oriented openings and substantially axially-oriented openings to permit actuation of the working end between a linear configuration and an articulated configuration; and wherein each of the respective substantially radially-oriented openings and substantially axially-oriented openings form a mating key receiving portion that receives a key portion, and where each radially-oriented opening is located adjacent an end surface of the key portion, wherein when the working end of the shaft is actuated to the articulated configuration the radially-oriented and axially-oriented openings close together, such that the key portion and mating key receiving portion interlock together to increase resistance to torsion of at least an outermost sleeve of the plurality of concentric sleeves.