Patent ID: 7073606

Claim:
A power tool comprising a toolholder ( 12 , 102 ) driveable in at least rotary fashion via a driven shaft ( 10 , 98 , 100 ), which comprises a workholding fixture ( 14 ) for attaching tools ( 16 , 104 ) actuatable in the direction of rotation of the driven shaft ( 10 , 98 , 100 ), and comprising a locking device ( 18 , 86 , 90 ), via which the driven shaft ( 10 , 98 , 100 ) is coupleable to and from a housing part ( 20 , 106 ) in torsion-resistant fashion for locking and releasing the working fixture ( 14 ), and which opens automatically when torque is transferred from the drive motor to the toolholder ( 12 , 102 ) and locks automatically when torque is transferred from the toolholder to the drive motor, wherein the locking device ( 18 , 86 , 90 ) is located on the driven shaft ( 10 , 98 , 100 ), wherein the locking device ( 18 , 90 ) comprises a washer ( 42 ) that comprises at least one driving element ( 32 , 34 ) for transferring torque, wherein the washer ( 42 ) is located on a first bearing seat ( 36 ) of the driven shaft ( 10 , 100 ) in torsion-resistant fashion, and the toothed gear ( 22 , 110 ) is located on a second bearing seat ( 38 ) of the driven shaft ( 10 , 100 ) in rotatable fashion.