Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 29, 2009
0Patent Application Number
117337980
Date Filed
April 11, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An abrupt fall in a current value immediately after an abrupt rise at the time when an starting switch is turned ON is detected, when the current value rises due to starting of nut fastening and then the current value abruptly falls, it is determined that an inward flange of a washer is sheared, and when the current value reaches a value corresponding to a primary fastening torque, the motor is stopped.
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