Patent ID: 6796475
Filing Date: 2004-09-28
Classification: B25C,H02P

Abstract:
A controller for a hand tool having an inertial member accelerated by a motive device and selectively coupled by a clutch to driver to impart kinetic energy to a fastener for driving the fastener into a workpiece, the speed controller comprising:a sensor operable to sense a parameter of the inertial member indicative of kinetic energy therein; and a circuit arrangement operably configured to command the clutch to impart the kinetic energy of the inertial member in response to both a user input and to the sensed parameter reaching a target value; wherein the circuit arrangement is further operably configured to monitor the parameter of the flywheel after commanding actuation of the clutch assembly, and to command deactuation of the clutch assembly in response to the monitored parameter reaching a threshold.