US 11,850,710 B2
Impact wrench
Yuya Sano, Anjo (JP); Yuki Murai, Anjo (JP); and Nobuaki Shikata, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Sep. 2, 2021, as Appl. No. 17/464,958.
Claims priority of application No. 2020-172769 (JP), filed on Oct. 13, 2020.
Prior Publication US 2022/0111497 A1, Apr. 14, 2022
Int. Cl. B25B 21/02 (2006.01); B25B 23/00 (2006.01)
CPC B25B 21/02 (2013.01) [B25B 23/0035 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An impact wrench, comprising:
a motor;
a hammer disposed frontward of the motor and configured to be rotated in response to the motor being energized;
a hammer case, which houses the hammer; and
an anvil comprising: an arm portion disposed frontward of the hammer and configured to be impacted in a rotational direction by the hammer; a cylindrical portion connected to the arm portion and supported by the hammer case; a socket-mating portion disposed frontward of the cylindrical portion; and an enlarged portion comprising a plurality of radially outwardly flared tongues each having a front surface and a rear surface disposed between the cylindrical portion and the socket-mating portion;
wherein an outer dimension of the enlarged portion enlarges in a direction extending rearward from the socket-mating portion;
the anvil has a continuous ring-shaped channel disposed between the cylindrical portion and the socket-mating portion of the anvil; and
the rear surface of each of the flared tongues defines a front portion of the continuous ring-shaped channel.