Wrench-based tap and die holders

Abstract

A threading tool, such as a tap or die holder, is configured to be driven by a generic wrench. The tool is provided with a wrench-engageable surface, such as a faceted cylindrical surface, or a cylinder with a polyhedral cross-section perpendicular to its axis. A outwardly extending peripheral flange, downward from the wrench-engageable surface, contacts and allows an open-backed wrench to exert downward force on the tool. A inwardly extending peripheral groove, downward from the wrench-engageable surface, allows a wrench to insert a holding device into the profile of the tool to hold the wrench and tool together. The holder may have a collet that activates the holding function by moving along the axis of the holder, but the collet is prevented from rotating about the axis of the holder. The collet may have a wrench-engageable surface. A collar, threaded to the holder, moves the collet.

Dependencies are inferred from the claim text.