Patent ID: 11872674
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. An impact tool comprising:
a housing;
a motor supported within the housing; and
a driving end portion extending from the housing along a longitudinal axis and configured to receive a tool element over a distal end thereof, the tool element being rotatable with the driving end portion in response to operation of the motor, the driving end portion including
a plurality of sides defining an outer perimeter having a first width,
a head defining an inner perimeter having a second width less than the first width, the head offset relative to the plurality of sides along the longitudinal axis, and
a groove shaped to receive a friction ring configured to engage the tool element, the groove including a linear portion adjacent a first side of the plurality of sides and a curved portion adjacent a second side of the plurality of sides,
wherein one of the linear portion and the curved portion is delimited by a surface of the head between the distal end and the plurality of sides along the longitudinal axis, and the other of the linear portion and the curved portion is open to the distal end.