Patents Assigned to Daiichi Dentsu, K.K.
  • Nut runner using induction motor
    Patent number: 4554980
    Abstract: A nut runner for tightening screwed objects comprising: a driving motor, a driving shaft to be coupled to the screwed objects for driving the same, a reduction gear mechanism provided for transferring the revolution power of the driving motor to the driving shaft, a torque for detecting a torque applied to the driving shaft, and a control circuit for controlling the driving motor by the use of the detected output of the torque detector. In accordance with the present invention, a two-phase induction motor is employed as the driving motor.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: November 26, 1985
    Assignee: Daiichi Dentsu, K.K.
    Inventor: Tabito Doniwa