TOOL POSITIONING SYSTEM

摘要

A tool positioning apparatus permitting tool adjustment in two planes, the apparatus generally including an articulating joint apparatus and a resistance thread mechanism for rotatably positioning a tool about a central axis. In one embodiment the joint includes two halves rotatable about a central axis. The two halves are positionable through use of a push-button release that disengages a gear member and permits movement of the two halves relative to each other. In one embodiment, a gear has teeth disposed on one surface, two opposing substantially straight sides, and two opposing substantially curved sides, with a triangular protrusion mounted on each of the gear's two straight portions. The thread resistance mechanism utilizes an elastomeric threading in a narrowing taper.