Two piece punch with pilot hole locator
Patent 6981327 Issued on January 3, 2006. Estimated Expiration Date: 
January 10, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 10, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 10340121 filed on 01/10/2003US Classes:30/360, With portion positioned in work aperture30/361, Work-mounted30/366, Pointed83/685, Tool pair83/686, Shear-type male tool83/689Progressive cuttingExaminersPrimary: Dexter, Clark F.Attorney, Agent or FirmForeign Patent References
International ClassB26F 1/02AbstractA two piece punch is provided for use in a punch assembly. The punch includes a generally disc shaped cutter and a cylindrically shaped nut. The punch is assembled by passing a portion of the nut through an aperture in the cutter. The punch is mounted to the remainder of the punch assembly by fastening the nut to the draw stud. As the punch becomes worn, use of the nut continues while the cutter is removed and replaced.Other References
Field of SearchPERFORATING OR INDENTING IMPLEMENTSCombined with other type cutter With portion positioned in work aperture Work-mounted Hand-guided, motor-driven Pointed With impact drive With stripper, sheath or gauge Form cutter Punching plus nonpunching tool Punching tool Tool pair Shear-type male tool Plural spaced successively operative shearing portions Progressive cutting Tubular or tube segment forms work-engager Screw threaded work-engager APPARATUS FOR MAKING WASHER | |
