ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,884, issued on Feb. 10, was assigned to MAKITA Corp. (Anjo, Japan).
"Impact tool" was invented by Tomoya Hattori (Anjo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact tool includes: a motor; a hammer, which is rotated by the motor; an anvil, which is impacted by the hammer in a rotational direction; two or more springs, which bias the hammer forward toward the anvil and are disposed parallel to each other; a cam mechanism, which alternately retracts the hammer while compressing the springs in response to application of the driving force of the motor and permits the hammer to be advanced by the elastic force of the compressed springs;...