Patent ID: 9636130
Date: 2017-05-02
CPC Classifications: A61B

Claim:
1. A surgical instrument, comprising: a cutting member including a cutting edge configured to cut tissue, the cutting member configured to rotate about a longitudinal axis and move along the longitudinal axis between a proximal position and a distal position; an outer tubular member, the cutting member received within the outer tubular member, the outer tubular member including a cutting window, wherein, in the proximal position of the cutting member, the cutting edge is disposed proximally of the cutting window, and wherein, in the distal position of the cutting member, the cutting edge is disposed distally of the cutting window; and a drive member coupled to the cutting member, the drive member configured to rotate the cutting member and move the cutting member between the proximal and distal positions in response to a rotational force being applied to the drive member in a single direction, the drive member including a helical groove having a left-hand threaded helical channel and a right-hand threaded helical channel, the left-hand threaded helical channel and the right-hand threaded helical channel blended together at their ends to form a continuous groove such that there is a smooth transition from the left-hand threaded helical channel to the right-hand threaded helical channel.