Extractor Tool and Extractor Tool Kit
AssigneeLisle Corporation
InventorsMichael L. Whitehead, Brian C. Lambert
Life of this patent
Estimating the term…
Abstract
An extractor tool for Torx brand and other fluted fasteners comprising an end section for engaging a fastener opening comprising six equally spaced, uniformly sized, pitched flutes separated by uniform depth grooves located at the end of a shank with a cylindrical connecting section joined thereto, in turn, joined to an impact drive end of the shank. The fluted end section has a frusto-conical configuration with the narrow dimension of the fluted end section at the distal end of the tool and wherein the distal end has a flat surface transverse to the longitudinal axis of the shank.
Claims9
An extractor tool for effect removal of Torx brand and fluted drive opening fasteners comprising:
- an elongate shank having a longitudinal centerline axis, an impact end and a fastener engaging end;
- said fastener engaging end compatibly sized for engaging a Torx brand and a fluted drive end fastener and having a configuration characterized by a generally flat, planar, distal end surface transverse to the axis, a nose section extending to the distal end surface, said nose section including six equally sized and shaped uniformly pitched flutes, each pair of flutes separated by equally sized and shaped scalloped grooves, each groove intersecting a pair of flutes along first and second generally parallel, uniformly spaced edges, said nose section including a first portion immediately adjoining the distal end surface and a second, generally co-axial cylindrical portion adjoining the first portion and intermediate the first portion and the impact end;
- said first portion flutes having an arcuate outer surface with a radius generally transverse to the longitudinal axis, and are of about 3° to 10° and divergent tangents from the end relative to the longitudinal axis in the range of about 10° to 20°;
- said flutes having a pitch in the range about 20° to 40° in a clockwise or counter clockwise direction, said grooves including a generally uniform and equal depth.
Dependencies are inferred from the claim text.