Patent ID: 9155545
Filing Date: 2015-10-13
Classification: A61B,B23B

Abstract:
1. A tool assembly for use with a surgical drill handpiece having a socket for receiving the tool assembly, comprising: a) a tool holder body having a proximal portion with a proximal end, a distal portion with a distal end, and defining a longitudinal bore extending between said proximal and distal ends, said proximal portion adapted for engagement with the socket of the drill handpiece, and said bore having a threaded portion and defining a bore axis; b) a tool shaft having a proximal end and a distal end, said tool shaft extending within said bore and permanently retained relative to said tool holder body, and said tool shaft rotatable about a tool shaft axis, said proximal end of said tool shaft having structure by which said drill handpiece is adapted to apply a torque to said tool shaft to rotate said tool shaft about said tool shaft axis; c) a cutting tool coupled relative to said distal end of said tool shaft, such that rotation of said tool shaft results in rotation of said cutting tool, said cutting tool having a length; d) a tubular tool guard having a proximal end, a distal end and a central portion, said proximal end threadedly coupled related to said threaded portion of said bore, and said distal end having an opening sized to permit advancement of said cutting tool therethrough, said cutting tool freely rotatable relative to said tool guard, wherein rotation of said tool guard relative to said holder body longitudinally displaces said distal end of said tool guard relative to said holder body and sets of a defined working length of said length of said cutting tool extending beyond said distal end of said tool guard; and e) a bearing sleeve retained in said bore and extending within said tool guard, said shaft extending within and freely rotatable relative to said bearing sleeve,