US 12,246,428 B2
Striking tool
Kiyonobu Yoshikane, Anjo (JP); and Mizuki Yamamoto, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/701,074.
Claims priority of application No. 2021-064335 (JP), filed on Apr. 5, 2021.
Prior Publication US 2022/0314414 A1, Oct. 6, 2022
Int. Cl. B25D 17/08 (2006.01)
CPC B25D 17/088 (2013.01) [B25D 2217/0042 (2013.01); Y10T 279/17076 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A striking tool, comprising:
a tool holder being cylindrical and configured to receive a rear end of a tip tool at a front of the tool holder, the tool holder having a pair of reception holes extending radially;
two balls movable backward and forward in the pair of reception holes in an axial direction of the tool holder, the two balls being movable into and out of an area adjacent to an axis of the tool holder;
an abutting member being a ring, the abutting member being externally mounted on the tool holder in a manner movable backward and forward;
an urging member between the tool holder and the abutting member, the urging member urging the two balls forward in the reception holes with the abutting member;
a pressure ring externally mounted on the tool holder, the pressure ring being movable backward and forward, the pressure ring adjacent to a front of the abutting member, the pressure ring being urged forward by the urging member;
an operation sleeve externally mounted on the tool holder, the operation sleeve being movable backward and forward between a locked position being forward and an unlocked position being backward,
at the locked position, the operation sleeve having an inner circumference of the operation sleeve in contact with the pressure ring, the pressure ring being located outside the two balls in front portions of the reception holes to cause the two balls to protrude toward the axis of the tool holder, and
at the unlocked position, the operation sleeve allowing the pressure ring to move backward from a position outside the two balls to permit the two balls to retract from a protruding position at which the two balls protrude into the tool holder;
wherein the abutting member includes a projection facing the pressure ring, the projection being configured to cause, with the pressure ring at the locked position, the abutting member to be in an inclined posture with respect to the axis of the tool holder to allow a first ball of the two balls to move more backward than a second ball of the two balls.