Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chengzhong Chen0
Gianni Borinato0
Hongfeng Zhong0
Kelvin Wong0
Paolo Andriolo0
Shisong Zhang0
Warren Brown0
Fangshi Liu0
Date of Patent
February 8, 2011
0Patent Application Number
121987120
Date Filed
August 26, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A power tool includes a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The power tool includes a signal generator and a control system electrically coupled to the signal generator and operatively engaged with the gear transmission mechanism such that when the signal generator is manually activated, an electric signal is generated and transmitted to the control system to cause the gear transmission mechanism to vary the gear reduction ratio.
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