Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
November 17, 2015
Patent Application Number
13392707
Date Filed
August 19, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A screw-fastening tool having a continuously-variable transmission traction drive includes a continuously-variable transmission, a thrust cam mechanism of the continuously-variable transmission and a clutch plate of a fastening torque setting mechanism arranged in series between an electric motor and a spindle. A traction grease having a high traction coefficient is used as a lubricant for a traction drive. A grease reservoir or felt members in sliding contact with oppressing parts are disposed in a transmission case.
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