ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,429, issued on March 18, was assigned to TRIS INC (Matsusaka, Japan).
"Carbon grounding brush" was invented by Taisuke Hattori (Matsusaka, Japan) and Yuma Fukuta (Matsusaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A carbon grounding brush has a sliding surface that slides on and grounds a driving shaft transmitting driving force and exposed to an insulating liquid. A slit is provided on the sliding surface, and at least one end of the slit is located on one side of the sliding surface. The slit introduces into the slit the insulating liquid pressed towards the sliding surface by the rotation of the driving shaft and discharges the insu...