Patent ID: 6983807

Claim:
An electrical, rotary-percussion hand-held tool, comprising a spindle ( 4 ) having a chuck ( 5 ) for receiving a working tool; an electric motor ( 1 ) for driving the spindle ( 4 ) at different rotational speeds corresponding to different operational modes; a percussion mechanism ( 2 ) and a gear mechanism ( 3 ) arranged between the electric motor ( 1 ) and the spindle ( 4 ) for transmitting a drive torque from the electric motor ( 1 ) to the spindle ( 4 ); a mode selection switch ( 8 ) for selecting an operational mode and having a plurality of stable, self-locked switching positions corresponding to the different operational modes; signal means ( 6 , 6 1 ) operatively connected with the mode selection switch ( 8 ) in a switch position (A) thereof corresponding to an activated chisel positioning mode in which the mode selection switch ( 8 ) is in an unstable position; and rotation shifting means ( 7 ) operatively connected with signal means ( 6 , 6 1 ) and electrically connected with the electric motor ( 1 ) for changing a rotational speed of the electric motor for driving the spindle ( 4 ) with a rotational speed corresponding to the selected operational mode.