ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,812, issued on March 18, was assigned to Milwaukee Electric Tool Corp. (Brookfield, Wis.).
"Multi-speed automatic transmission for a power tool" was invented by David B. Marolla (Menomonee Falls, Wis.) and Kevin Puls (Milwaukee).
According to the abstract* released by the U.S. Patent & Trademark Office: "Multi-speed automatic transmissions for power tools are provided. A multi-speed automatic transmission includes an output shaft configured to be coupled to a chain sprocket to rotatably drive the chain sprocket, wherein the automatic transmission is configured to automatically shift between a plurality of gear ratios in response to a rotational speed of the output shaft reaching...