ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,906, issued on Aug. 19, was assigned to MAKITA Corp. (Anjo, Japan).
"Screw-tightening tool" was invented by Hiroki Ikuta (Anjo, Japan) and Takumi Hayashi (Anjo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A screw-tightening tool includes a housing, a motor, a spindle, a first clutch and a second clutch. The first clutch is operably coupled to an output shaft and the spindle, and is configured to transmit power from the output shaft to the spindle only when the output shaft is rotationally driven in a first direction. The second clutch is operably coupled to the output shaft and the spindle, and is configured to transmit the power from the o...