Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Thu Van Nguyen0
Date of Patent
February 12, 2008
Patent Application Number
11307353
Date Filed
February 2, 2006
Patent Primary Examiner
Patent abstract
A process for manufacturing a hollow metal ball bat includes forming a shell into a tubular shape using a pilger mill. The wall thickness of the tube shell is reduced by drawing the tube shell with the draw bench. A handle section and a taper section are created using the pilger mill. The handle is drawn through a draw bench, and the handle and taper sections are swaged.
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