US 12,115,626 B2
Impact tool
Kihiro Kusumoto, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Mar. 1, 2023, as Appl. No. 18/176,892.
Claims priority of application No. 2022-080195 (JP), filed on May 16, 2022.
Prior Publication US 2023/0364749 A1, Nov. 16, 2023
Int. Cl. B25B 21/02 (2006.01)
CPC B25B 21/02 (2013.01) 18 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 at a rear of the spindle shaft;
an anvil including
an anvil shaft located frontward from the spindle to receive a tip tool, and
an anvil projection protruding radially outward from the anvil shaft;
a hammer supported by the spindle shaft, the hammer including
a hammer projection to strike the anvil projection in a rotation direction,
a recess at a rear of the hammer, and
a support groove inside the recess;
a first coil spring and a second coil spring surrounding the spindle shaft;
a cup washer located in the recess and supporting a front end of the first coil spring and a front end of the second coil spring; and
a support ball located in the support groove and supporting the cup washer.