Slug-splitting punch
Patent 4543722 Issued on October 1, 1985. Estimated Expiration Date: 
January 27, 2003. 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 27, 2003. 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 References 1817223 2214701 2221904 3728927 InventorsAssigneeApplicationNo. 06/461406 filed on 01/27/1983US Classes:30/360, With portion positioned in work aperture83/688Plural spaced successively operative shearing portionsExaminersPrimary: Watts, Douglas D.Attorney, Agent or FirmInternational ClassesB21D 28/34 (20060101)B26F 1/38 (20060101) B26F 1/14 (20060101) B26F 1/02 (20060101) AbstractA male punch member is disclosed for use with a female die member to remove a slug in two pieces from a sheet metal workpiece. The working end of the punch member is specially configured to enable punching and splitting of a slug into two pieces from a wide range of materials such as 10-gauge, type 304 stainless steel while providing acceptable punch life. | |
