ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,901, issued on May 6, was assigned to Koki Holdings Co. Ltd. (Tokyo).
"Impact tool" was invented by Kengo Tamura (Ibaraki, Japan), Junichi Toukairin (Ibaraki, Japan) and Shota Takeuchi (Ibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact tool includes a hammer that is rotated by a motor and energized toward a front side from a spindle by a cam mechanism and a spring, and an anvil that is struck by the hammer. The hammer includes a main body part, and claw parts extending forward from the main body part, and tapered surfaces are formed such that an inner diameter side end of each of the claw parts of the main body part is located ...