Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Youn Chyuan Liao0
Date of Patent
December 25, 2007
0Patent Application Number
112045260
Date Filed
August 16, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A ratchet tool includes a barrel rotatably engaged into a cartridge and having a gear, two pawls slidably received in the cartridge and each having a base plane and a side plane and two or more teeth biased to engage with the gear of the barrel, and a control ferrule may control the engagement of the pawls with the gear of the barrel. The teeth of the pawls each includes two tooth surfaces having different included angles relative to the base plane of the pawl and relative to the side plane of the pawl, and having different included angles relative to each other, for allowing the barrel to be suitably rotated or driven by the cartridge with an increased driving torque.
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