US Patent 7077736 Angle attachment for power tool

An angle attachment for a rotary power tool includes a first assembly including a first shaft and a first gear and a second assembly including a second shaft and a second gear. The second gear engages the first gear and the central longitudinal axis of the second shaft is not collinear or parallel to the central longitudinal axis of the first shaft. The angle attachment further includes a member configured for removable coupling to a motor shaft of a rotary power tool and for removable coupling with the first assembly. At least a portion of the member is configured for insertion into a component of the first assembly.