ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,021, issued on April 14, was assigned to Black & Decker Inc. (New Britain, Conn.).
"Impact power tool" was invented by Tyler Petrus (Baltimore) and Robert J. Opsitos (Felton, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact power tool includes a transmission output shaft, a rotary impact assembly with a cam shaft, hammer, and anvil, and a tool output shaft rotatable with the anvil. A coupler removably couples the cam shaft to the transmission output shaft. When torque on the tool output shaft is less than or equal to a first threshold, the transmission output shaft, cam shaft, hammer, and anvil rotate together to transmit torque to the ...