US 12,138,752 B2
Impact tool
Kazuma Aoki, Anjo (JP); and Tomoro Aoyama, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Apr. 26, 2023, as Appl. No. 18/139,763.
Claims priority of application No. 2022-094812 (JP), filed on Jun. 13, 2022.
Prior Publication US 2023/0398662 A1, Dec. 14, 2023
Int. Cl. B25B 21/02 (2006.01)
CPC B25B 21/02 (2013.01) 14 Claims
OG exemplary drawing
 
1. An impact tool, comprising:
a motor;
a spindle rotatable with a rotational force from the motor, the spindle including
a spindle shaft, and
a flange on a rear portion of the spindle shaft;
an anvil located frontward from the spindle, the anvil including
an anvil shaft to receive a tip tool, and
an anvil projection protruding radially outward from the anvil shaft; and
a hammer including
a base surrounding the spindle shaft, the base including a thinner portion and a thicker portion,
a front ring protruding frontward from an outer circumference of the base, and
a hammer projection protruding radially inward from an inner circumferential surface of the front ring to strike the anvil projection in a rotation direction, the hammer projection having a front surface located frontward from a front surface of the base,
wherein the thinner portion has a groove at a boundary with the hammer projection,
wherein the thinner portion has a first front surface, the thicker portion has a second front surface, and the second front surface is at a position different from the first front surface in a circumferential direction and frontward from the first front surface.