Patent ID: 7721819

Claim:
A rotary hammer comprising: a housing; a tool holder mounted on a front portion of the housing; a motor mounted in the housing and including an armature shaft arranged substantially perpendicular to an axis of rotation of the tool holder, the armature shaft including toothing; a hammer mechanism driven by the motor to generate impacts on a tool being held by the tool holder, the hammer mechanism including a first intermediate shaft adjacent and substantially parallel to the armature shaft facing away from the tool holder; and a rotation drive mechanism driven by the motor to rotatingly drive a tool being held by the tool holder, the rotation drive mechanism including a second intermediate shaft adjacent and substantially parallel to the armature shaft facing the tool holder, wherein the toothing of the armature shaft meshes with corresponding toothing on at least one of the first intermediate shaft and the second intermediate shaft, and further comprising a chain drive coupling the first intermediate shaft to the second intermediate shaft so that the first and second intermediate shafts are driven together by the armature shaft.