Patent ID: 7234536
Filing Date: 2007-06-26
Classification: B23P,B25B

Abstract:
1. A power screwdriver comprising: a drive; a tool drive shaft for driving a tool; a clutch, releasing when a certain preset torque is reached, having an input side being coupled to said drive and having an output side being coupled to said tool drive shaft; a sensor being coupled to said clutch for sensing a release of said clutch; an angle sensor for sensing a rotation angle of said tool drive shaft; brake means for braking said drive after release of said clutch; and an electronic control for controlling said drive, said electronic control being coupled to said sensor for deactivating said drive when said clutch releases, and wherein said electronic control is coupled to said angle sensor for switching on said drive again upon reaching a first rotation angle after release of said clutch and for switching off said drive again upon reaching a second rotation angle after release of said clutch.