ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,865, issued on April 29.
"Drill speeder and drilling device" was invented by Ruiqi Wang (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drill speeder. The drill speeder is used for increasing the rotating speed of a drill bit in drilling operation and comprises: an upper joint (1) connected to a drill tool (200) in the drilling operation; a lower joint connected to the drill bit (300); and three wing plates (9) arranged on the outer surface of a gear sleeve (10) of the drill speeder in an equal division mode, and closely attached to pistons embedded on the gear sleeve (10). When the drill bit (300) conducts a speed increasing operati...