Patent ID: 7334715

Claim:
An electric fastener driver comprising: a housing having a fastener driving position; a motor disposed in the housing; a magazine attached to the housing for supplying a fastener to the fastener driving position; a flywheel rotatably supported to the housing and driven by the motor; a driven rotor rotatably supported to the housing; a driver segment driven by the driven rotor; a coil spring capable of transmitting rotation of the flywheel to the driven rotor; a clutch mechanism selectively coupling the flywheel to the driven rotor through the coil spring, the clutch mechanism comprising a solenoid having a plunger movable between ON position and OFF position; and a ratchet mechanism having a forcible shut off arrangement that forcibly moves the plunger to the OFF position for forcibly shutting off power connection between the flywheel and the driven rotor when the driven rotor is rotated by a predetermined rotation angle after the flywheel and the driven rotor are connected to each other while the solenoid is turned ON.