Patent ID: 7955349

Claim:
A body piercing instrument, comprising: a post carrier supporting a post, the post carrier disposed to translate in a first channel within the body piercing instrument; a nut carrier supporting a nut, the nut carrier disposed to translate in a second channel within the body piercing instrument in opposition to translation of the post carrier; a synchronizing mechanism between the post carrier and the nut carrier to coordinate opposing motion of both the post carrier and the nut carrier simultaneously; a handle for manual manipulation and support of the piercing instrument, where the first channel and second channel are disposed within the handle; and a pull lever attached directly to the nut carrier; wherein only the synchronizing mechanism drives the post carrier with opposing motion to the nut carrier and wherein the pull lever is drawn by hand such that the synchronizing mechanism is driven by pressure applied to the pull lever attached directly to the nut carrier and thereby causing the nut carrier to translate and the synchronizing mechanism to drive the post carrier in opposition to the nut carrier.