US Patent 6912934 Ratchet screwdriver
Patent 6912934 was granted and assigned to LG on July, 2005 by the United States Patent and Trademark Office.
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Patent abstract
A ratchet screwdriver has a body and a driving portion. The body has a handle, a shank integrally formed on the handle, a post with a non-circular periphery pivoted with the shank and a head formed on the post. The driving portion has a spring mounted on the post, a cylinder with a non-circular inner periphery mounted on the post, and a chuck mounted on the head and used for holding the tool head. Because the driving portion of the ratchet screwdriver is longitudinally set on the body, it can reduce whole volume of the ratchet screwdriver to enable the screwdriver to be used in a small place.
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Patent Inventor Names
Hui-Chen Liao0
Date of Patent
July 5, 2005
0Patent Application Number
107034770
Date Filed
November 10, 2003
0Patent Primary Examiner
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US Patent 6912934 Ratchet screwdriver
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