US Patent 9194462 Handheld power tool having a planetary gear set

In a handheld power tool having a planetary gear set which is at least switchable between a first and a second gear and which is assigned a switching annulus gear which is at least shiftable between a first and a second switching position and which has the first switching position in the first gear and the second switching position in the second gear, the switching annulus gear is assigned a synchronization unit which is designed to enable a synchronization of the switching annulus gear with a planet carrier or with a blocking element of the planetary gear set when the switching annulus gear is shifted between the first and the second switching position to switch over the planetary gear set.