US 12,304,032 B2
Impact tool
Ding Zhao, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Jul. 3, 2023, as Appl. No. 18/217,859.
Claims priority of application No. 2022-128129 (JP), filed on Aug. 10, 2022.
Prior Publication US 2024/0051094 A1, Feb. 15, 2024
Int. Cl. B25B 21/02 (2006.01); B25D 16/00 (2006.01); B25D 17/26 (2006.01); B25F 5/02 (2006.01)
CPC B25B 21/02 (2013.01) [B25D 16/00 (2013.01); B25D 17/26 (2013.01); B25F 5/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An impact tool, comprising:
a motor;
a spindle at least partially located frontward from the motor and rotatable by the motor, the spindle including an internal space extending frontward from an opening in a rear end face of the spindle, the internal space including
a first space having a first inner diameter, having a cylindrical shape and connected to the opening,
a second space located frontward from the first space, having a second inner diameter smaller than the first inner diameter and having a cylindrical shape, and
a third space connected to a front end of the second space, having a third inner diameter larger than the second inner diameter and having a cylindrical shape, the third space containing a lubricant oil,
a central axis of the first space, a central axis of the second space, and a central axis of the third space are parallel to a rotation axis of the spindle;
a hammer surrounding the spindle; and
an anvil at least partially located frontward from the spindle, the anvil being strikable by the hammer in a rotation direction.