ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,501, issued on March 17, was assigned to Black & Decker Inc. (New Britain, Conn.).
"Impact power tool" was invented by David Tomayko (Ellicott City, Md.) and Tyler Petrus (Baltimore).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact power tool includes one or more of the following features including a housing, a motor, an output spindle, a rotary impact assembly, and a planetary transmission having a fixed ring gear and rotatable planet gear carrier. In an aspect, the planetary transmission is configured to transmit rotational motion from a motor output shaft to a cam shaft at a single overall speed reduction ratio. The planetary transmission...