Patent ID: 8448547

Claim:
An extractor tool for effecting removal of Torx brand and fluted drive opening fasteners comprising: an elongate shank having a longitudinal centerline axis, a peripheral surface, an impact end section and a fastener engaging end section; said fastener engaging end section compatibly sized for engaging a Torx brand fastener opening, said fastener engaging end section having a configuration characterized by a generally flat, planar, distal end surface transverse to the shank centerline axis, a nose section extending axially toward the impact end section from the distal end surface, said nose section including six equally sized and shaped, uniformly pitched flutes, each flute having a first edge and a generally parallel second edge, each pair of flutes separated by an equally sized and shaped scalloped groove extending through and into the peripheral surface, each of said grooves intersecting a pair of adjacent flutes along said first and second generally parallel, uniformly spaced edges of said adjacent flutes, said nose section including a first portion immediately adjoining the distal end surface and extending axially therefrom toward the impact end section and a second, generally co-axial cylindrical portion extending from and adjoining the first portion and intermediate the first portion and the impact end section; each of said first portion flutes of said nose section having an arcuate outer surface defining a smooth arc with a radius of curvature centered on the longitudinal axis, said arc extending about 3° to 10° and said fastener engaging end having a generally frusto-conical configuration diverging from the longitudinal axis outwardly from fastener engaging end to a tangent from the end surface relative to the longitudinal axis in the range of about 10° to 20° ; all of said flutes having an equal pitch in the range about 20° to 40° in either a clockwise or counter clockwise direction, all of said grooves including a generally uniform and equal depth.