Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jui-Hsiao Wang0
Date of Patent
October 21, 2008
0Patent Application Number
118531450
Date Filed
September 11, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A screwdriver bit includes a shank for coupling with a tool for rotating the shank. An engaging portion extends from one of two ends of the shank and includes an insertion section for coupling with a fastener. A reduced, threaded section is formed between one of the ends of the shank and the insertion section of the engaging portion. The reduced, threaded section includes an outer diameter smaller than that of the ends of the shank and an outer threading. The outer threading of the reduced, threaded section provides uniform stress distribution during torque transmission.
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