Patent ID: 7891084
Filing Date: 2011-02-22
Classification: B28D,E02F,E21C,Y10T

Abstract:
1. A device for extracting a quick-change tool holder from locking engagement with a base block mounting of a machine wherein said quick-change tool holder has a forward surface, a rearwardly extending generally cylindrical shank, a rearward end, and an axial bore extending into said forward surface and through said generally cylindrical shank to said rearward end, and said base block mounting has a body with an outer surface, a forward surface, a rearward surface and a central opening extending from said forward surface to said rearward surface, said shank of said quick change tool holder being tightly fitted within said central opening of said base block mounting, said device comprising a front plate, a first arm and a second arm extending rearwardly from opposing ends of said front plate, contact surfaces on rearward ends of said first and second arms for engaging opposing portions of said outer surface of said base block mounting, said front plate having a transverse hole therein, a threaded stud having a forward end, a rearward end and a length an extraction nut having a first threaded hole therein and a second threaded hole parallel to said first threaded hole said forward end of said threaded stud threadedly received in said first threaded hole, said length of said threaded stud rearward of said extraction nut extending through said transverse hole and through said axial bore, a retaining nut threaded on said rearward end of said threaded stud, a jack screw having a head, a threaded portion and a distal end, said jack screw threaded through said second threaded hole with said distal end against said front plate wherein rotation of said head of said jack screws will draw said generally cylindrical shank out of said base block mounting.