Patent ID: 11858094
Assignee: MAKITA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 1:
2. The impact tool according to claim 1, further comprising:
a ball between the shaft and the hammer; and
a coil spring externally mounted on the shaft, wherein
the shaft extends frontward and has a cam groove on an outer circumferential surface,
the hammer is held with the ball,
the hammer is movable back and forth between a forward position at which the hammer is engaged with the anvil in the rotation direction and a rearward position at which the hammer is disengaged from the anvil in the rotation direction by the ball rolling in the cam groove,
the hammer is urged to the forward position by the coil spring, and
the hammer, the ball and the shaft are configured such that, when the load on the carrier is above the threshold load, the ball is at a rearmost end of the cam groove.